Skip to main content

REVIEW article

Front. Psychiatry, 05 March 2024
Sec. Schizophrenia

Treatment of antipsychotic-induced hyperprolactinemia: an umbrella review of systematic reviews and meta-analyses

Qitong Jiang,Qitong Jiang1,2Tian Li,Tian Li1,2Lei Zhao,Lei Zhao1,2Yue Sun,Yue Sun1,2Zhen Mao,Zhen Mao1,2Yujie Xing,Yujie Xing1,2Chuanyue Wang,Chuanyue Wang1,2Qijing Bo,*Qijing Bo1,2*
  • 1The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders & Beijing Institute for Brain Disorders Center of Schizophrenia, Beijing Anding Hospital, Capital Medical University, Beijing, China
  • 2Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China

Background: Hyperprolactinemia is a common antipsychotic-induced adverse event in psychiatric patients, and the quality of clinical studies investigating the best treatments has varied. Thus, to better summarize the clinical evidence, we performed an umbrella review of overlapping systematic reviews and meta-analyses for the treatment of antipsychotic-induced hyperprolactinemia.

Methods: The PubMed, Cochrane Library, PsycINFO, Scopus and EMBASE were searched, and reviews and meta-analyses meeting our inclusion criteria were selected. Relevant data were extracted, and an umbrella review was conducted of all included meta-analyses. The quality of included meta-analyses was assessed by using PRISMA scores and AMSTAR 2 quality evaluation. Finally, the clinical evidence for appropriate treatments was summarized and discussed.

Results: Five meta-analyses published between 2013 and 2020 met the requirements for inclusion in this umbrella review. The PRISMA scores of the included meta-analyses ranged from 19.5–26. AMSTAR 2 quality evaluation showed that 2 of the 5 included meta-analyses were of low quality and 3 were of very low quality. The included meta-analyses provide clinical evidence that adding aripiprazole or a dopamine agonist can effectively and safely improve antipsychotic-induced hyperprolactinemia. Two meta-analyses also showed that adjunctive metformin can reduce serum prolactin level, but more clinical trials are needed to confirm this finding.

Conclusion: Adjunctive dopamine agonists have been proven to be effective and safe for the treatment of antipsychotic-induced hyperprolactinemia. Among the researched treatments, adding aripiprazole may be the most appropriate.

1 Introduction

Schizophrenia is a chronic and disabling disease (1) for which antipsychotics are currently the main first-line treatment (2). Chemical neurotransmitters associated with schizophrenia include serotonin, norepinephrine, acetylcholine, dopamine, gamma-aminobutyric acid (GABA), and others. Among them, the dopamine system is predominant (3). Dopamine mediates activity through five G protein-coupled receptors, which are divided in two subgroups, D1-like receptors (D1 and D5) and D2-like receptors (D2, D3, and D4) (4). The occurrence of psychotic symptoms is closely related to the dopamine D2 receptor (5). Long-term clinical application of antipsychotics has established that drugs acting on the D2 receptor can significantly improve the positive symptoms of schizophrenia (6). Antipsychotics block the mesolimbic dopaminergic pathway and mesocortical dopaminergic pathway, inhibit neuronal activity, and also affect the nodular-funnel pathway of the hypothalamus, thereby leading to an increase in prolactin (7). Prolactin is synthesized and secreted by prolactin cells in the anterior pituitary gland, and this process can be inhibited by dopamine. In fact, any factors that reduce the action of dopamine on D2 receptors can lead to an increase in prolactin (8).

A continuously elevated prolactin level beyond the normal range for any reason is known as hyperprolactinemia (9). Hyperprolactinemia is one of the most common antipsychotic-induced adverse events in psychiatric patients, and it can lead to menstrual disorders, gynecomastia, and galactorrhea (10). The reported incidence ranges for antipsychotic-induced hyperprolactinemia were 18%–72% in men and 42%–93% in women (1114). Previous studies have suggested that antipsychotic-induced hyperprolactinemia is associated with the long dissociation time-course of these drugs (15) and their relatively poor ability to cross the blood–brain barrier (BBB) (16). Improving antipsychotic-induced hyperprolactinemia can increase medication compliance among patients (17, 18). However, treatment of antipsychotic-induced hyperprolactinemia has been a challenge clinically (19). The commonly used methods to improve antipsychotic-induced hyperprolactinemia include reducing the doses of the antipsychotic, switching to another antipsychotic that has a lesser effect on prolactin, adding a dopamine agonist, adding aripiprazole, and adding metformin (20). Among these methods, research to date has mainly focused on the adjunctive use of aripiprazole.

Aripiprazole exhibits a unique receptor binding characteristic. It is a partial agonist for dopamine D2 and D3 receptors that inhibits dopamine activity when the dopamine level is high and stimulates dopamine activity when the dopamine level is low (21). As a result of this characteristic, aripiprazole can be a stabilizer of dopamine and serum prolactin levels. Dopamine receptor agonists, including bromocriptine, cabergoline, and others, are widely used to treat hyperprolactinemia due to any reason. Dopamine agonist therapy is indicated for all patients with menstrual disorders, osteoporosis, and other symptoms caused by hyperprolactinemia (8). Some studies have also reported the effectiveness of traditional Chinese medicine in treating hyperprolactinemia (2224), but the relevant clinical evidence remains insufficient.

In recent years, several meta-analyses have been conducted to explore the best treatment strategy for hyperprolactinemia. However, the quality of these meta-analyses has varied, and their conclusions have included some inconsistencies. Therefore, the present study aimed to provide an umbrella review of overlapping systematic reviews and meta-analyses of treatments for antipsychotic-induced hyperprolactinemia to identify the best clinical evidence for treatment selection.

2 Methods

2.1 Inclusion and exclusion criteria

Articles were selected for analysis according to the following inclusion criteria: (1) meta-analysis or systematic review based on randomized controlled trials (RCTs) or observational studies; (2) participants were adults or adolescents with diagnosed psychotic disorders (schizophrenia, bipolar disorder with psychotic features, schizoaffective disorder, psychotic disorder not otherwise specified, etc.), without restrictions of gender, race and length of disease duration; (3) reporting of at least one outcome (serum prolactin level, prolactin-related symptoms, adverse events, etc.); and (4) published in English. Articles that meet the following criteria were excluded: (1) nonhuman subjects; (2) lack of necessary information; (3) network meta-analysis; (4) inappropriate comparison, outcome, study type or population (for example, studies focused on general population or mixed population were excluded); and (5) full-text not accessible.

2.2 Search strategy

Two researchers independently searched the PubMed, Cochrane Library, PsycINFO, Scopus and EMBASE. The literature searches were conducted since the inception of the databases up to November 2023. The key search terms included “antipsychotic induced hyperprolactinemia”, “treatment”, “meta analysis”, “meta-analysis”, and “systematic review”. A more specific example of a PubMed search is as follows: “antipsychotic”[Title/Abstract] AND “hyperprolactinemia”[Title/Abstract] AND (“meta analysis”[Title/Abstract] OR “meta-analysis”[Title/Abstract] OR “systematic review”[Title/Abstract]) AND “treatment”[Title/Abstract]. After elimination of duplicates and screening of the titles and abstracts, articles that met the inclusion criteria were selected. The full texts of the retained articles were downloaded and evaluated in detail. Citations were also screened manually to identify other potentially eligible articles.

2.3 Data extraction

All useful information and data were extracted from the selected studies by two authors independently and entered into a standard, simple form with repeated checking. The following types of data were collected for each meta-analysis: first author, types and number of included studies, publication year, Information on antipsychotic, population, intervention measures, outcomes, quality assessment tool, results and main conclusion.

2.4 Quality evaluation

A quality assessment plan was developed in advance with the research questions. The PRISMA Statement consists of 27 items and is widely used to evaluate the quality of meta-analyses and systematic reviews (25). A PRISMA score of 21–27 points reflects a high-quality study; 15–21 points indicates medium quality; and <15 points is considered as low quality. It primarily assesses whether the report is transparent, complete and accurate, irrespective of the soundness of the methodology. Relying solely on the PRISMA score for evaluation accurately gauges the author’s writing comprehension ability but falls short in assessing the quality of the review’s planning and conducting.

To address this limitation, the present umbrella review also employed The Assessment of Multiple Systematic Reviews 2 (AMSTAR 2) (26) scoring standard to assess the quality of the methodology. It comprehensively evaluates systematic reviews and meta-analyses from multiple aspects, such as the literature search, statistical analysis, bias and conflict of interest. It is the most commonly used tool to evaluate the methodological quality of meta-analyses internationally. AMSTAR 2 is applied to meta-analyses or systematic reviews based on RCTs and/or nonrandomized studies of interventions (NRSIs), but does not include network meta-analyses. For this reason, to ensure the consistency of quality evaluation, network meta-analyses were excluded from the present umbrella review.

3 Results

3.1 Research selection and characteristics

From our searches of three databases, 62 articles were retrieved. After the removal of duplicates, 37 articles remained. Based on screening of titles and abstract, 17 articles were selected for full-text evaluation. The full texts of the 17 potentially relevant articles were downloaded and assessed completely. Finally, 5 meta-analyses (2731) that met the requirements were included in this systematic review. The search process and exclusion reasons are described in Figure 1.

Figure 1
www.frontiersin.org

Figure 1 Flow diagram of article selection.

The included articles were published between 2013 and 2020. The quality assessment tools used in these articles included the Cochrane Risk of Bias tool, GRADE, and Jadad. The basic details of the included studies are presented in Table 1.

Table 1
www.frontiersin.org

Table 1 Basic information of the included meta-analyses.

3.2 Search strategy assessment

The electronic bibliographic databases utilized in the five included meta-analyses included Pubmed, Embase, Cochrane, CKNI, Wanfang database, and others. The details of the search methodology applied in each meta-analyses are summarized in Table 2.

Table 2
www.frontiersin.org

Table 2 Databases searched by each of the included meta-analyses.

3.3 PRISMA quality of the included meta-analyses

The PRISMA scores for the included meta-analyses ranged from 19.5–26 (average score, 22.4). All included meta-analyses had scores higher than 15, indicating there were no serious defects. Two meta-analyses (29, 30) had scores in the range of 15 to <21, which reflects some defects. The other three meta-analyses (27, 28, 31) were relatively more complete and had scores higher than 21. The details of the PRISMA quality scores of the included meta-analyses are presented in Table 3.

Table 3
www.frontiersin.org

Table 3 PRISMA quality scores of included meta-analyses.

3.4 AMSTAR 2 assessment of the included meta-analyses

The AMSTAR 2 quality evaluation of the five included meta-analyses is presented in Table 4. Two meta-analyses (29, 31) were of low quality, and three (27, 28, 30) were of very low quality. The main reason for the low quality was that none of the meta-analyses provided a list of excluded articles and explained the reasons (item 7). Other reasons for the reduced quality were that three meta-analyses (27, 28, 30) did not register and publish their research protocol in advance (item 2) and two meta-analyses (27, 30) failed to assess the publication bias because of the limited number of RCTs (item 15).

Table 4
www.frontiersin.org

Table 4 AMSTAR 2 quality evaluation of included meta-analyses.

3.5 Clinical evidence for treatment of antipsychotic-induced hyperprolactinemia

The five meta-analyses included in this review suggested that adjunctive aripiprazole, dopamine agonists, and metformin can effectively reduce serum prolactin concentrations. Among the included meta-analyses, Labad et al. (31) had the highest quality scores, indicating this meta-analysis was of the highest clinical significance. Li et al. (27) and Meng et al. (28) had rather high PRISMA scores, indicating that they have certain value for clinical guidance. Due to the insufficient studies included, meta-analysis was not conducted in Bo et al. (29), which resulted in decreased quality scores. Zheng et al., 2017 (30) exhibited several article structural defects, resulting in lower scores during evaluation. The PRISMA scores for the included meta-analyses suggested that all the reports were relatively comprehensive and accurate. However, the AMSTAR 2 scores were generally low, indicating methodological deficiencies in the reports. These shortcomings encompassed a lack of an exclusion list, a failure to analyze publication bias, and so on. It implied that the included meta-analyses demonstrated a relatively objective process of secondary analysis. However, the methodological flaws contributed to a certain degree of reduction in the credibility of the conclusions.

3.5.1 Adjunct aripiprazole

Three of the meta-analyses (27, 28, 31) discussed the efficacy of adjunctive aripiprazole and came to a positive conclusion that aripiprazole can effectively reduce the serum prolactin level in patients with antipsychotic-induced hyperprolactinemia. All of the three meta-analyses also assessed the safety of adjunctive aripiprazole and reached a similar conclusion that adjunctive aripiprazole was generally safe and well tolerated. While the PRISMA scores for these three meta-analyses were high, ranging from 22 to 26, the AMSTAR 2 quality varied, with one meta-analysis rated low and the other two very low. This suggests a need for further enhancement in the methodology of each meta-analysis.

Li et al. (27) demonstrated a significant 79.11% rate of prolactin level normalization with adjunctive aripiprazole. Meta-analysis indicated comparable side effect profiles between the adjunctive aripiprazole and placebo groups, except for higher occurrences of sedation, insomnia, and headache observed with adjunctive aripiprazole doses exceeding 15 mg/day. Furthermore, despite aripiprazole’s partial agonist activity at D2 receptors, adjunctive treatment did not lead to clinical deterioration or symptom exacerbation in hyperprolactinemia cases in this meta-analysis. The findings affirmed the safety and good tolerability of adjunctive aripiprazole (5–10 mg/day) in addressing antipsychotic-induced hyperprolactinemia. Notably, the meta-analysis recommended vigilant monitoring for side effects such as sedation, insomnia, and headache during adjunctive aripiprazole treatment. Li et al. (27) further explored the most appropriate dose of adjunctive aripiprazole and found that it may be 5 mg/day.

Meng et al. (28) reported comparable findings. They suggested that adjunctive aripiprazole could significantly increase the proportion of patients whose prolactin level returned to the normal range compared to the control condition. While the adverse effect rates during follow-up were similar between groups, the aripiprazole group exhibited higher likelihoods of reporting somnolence and headaches. In the investigation of the ideal dosage, high-dose aripiprazole (>5mg/day) appeared more effective than low-dose (<5mg/day) in promoting recovery from hyperprolactinemia, though the difference was not statistically significant. The findings provided reassurance that the use of adjunctive aripiprazole did not exacerbate existing psychotic symptoms.

Labad et al. (31) claimed that of all the potential therapeutic strategies for lowering prolactin, clinical trials prominently addressed the addition of aripiprazole to antipsychotic treatment, positioning it as the first option based on evidence-based medicine levels. The safety profile of aripiprazole was well-explored, revealing no significant differences compared to placebo. This meta-analysis further demonstrated low rates of psychopathological worsening with the open-label studies suggested a withdrawal rate of approximately 5% attributed to psychopathology worsening. Additionally, the analysis of three placebo-controlled RCTs indicated comparable withdrawal rates for aripiprazole (10.1%) and placebo (11.5%), emphasizing that, according to the available evidence, the primary consideration for reducing prolactin concentrations in schizophrenia patients with hyperprolactinemia is the addition of aripiprazole. In this meta-analysis, the doses of adjunctive aripiprazole ranged from 5 to 30 mg/day. However, this meta-analysis did not extensively investigate the optimal dosage of aripiprazole. Only one study included in the meta-analysis suggests that the effect size of aripiprazole dosage of 10 or 20 mg/day is greater compared to 5 mg/day.

3.5.2 Adjunct metformin

Two of the included meta-analyses (29, 30) evaluated the use of metformin in the treatment of hyperprolactinemia. The PRISMA scores for both meta-analyses were 19.5, and the AMSTAR 2 quality evaluations were low quality and very low quality, respectively. Both meta-analyses suggested that adjunctive metformin appeared to be effective and safe for reducing prolactin and improving prolactin-related symptoms. The meta-analysis by Bo et al. (29) included three clinical studies, with metformin doses of 750, 1000, and 1500 mg/day respectively. They suggested that adjunctive metformin exhibited a notable reduction in serum prolactin levels, averaging 54.6 μg/L in the three trials. The RCT showed a 67% resumption of menstruation in those with menstrual disturbances compared to 5% in the placebo group. Observational data indicated that 91% of patients no longer exhibited signs or symptoms of galactorrhea. Adverse drug reactions in the RCT were similar between metformin and placebo, except for non-discontinuation-associated increases in nausea, insomnia, and agitation.

In the meta-analysis conducted by Zheng et al. (30), the average dosage of metformin was 1167 mg/day (ranging from 750 to 1500 mg/day), and the results showed an average decrease in prolactin at endpoint of 6.87 μg/L. They also observed a menstruation resumption rate of 66.7% among patients with menstrual disturbances, compared to 4.8% in the control group. The incidence of adverse drug reactions and the overall discontinuation rate were similar between the metformin and control groups.

3.5.3 Adjunct dopamine agonists

Among all included meta-analyses, only Labad et al. (31) assessed the effectiveness and safety of dopamine agonists. They investigated Cabergoline (dose range 0.125mg/week-1mg/day), Bromocriptine (dose range 5-40mg/day), and Terguride (dose range 1mg/day), finding that all three dopamine agonists could lower serum prolactin levels. Among them, Cabergoline had the most substantial clinical evidence for reducing serum prolactin, while Terguride had slightly lower effect sizes for prolactin reduction. Regarding safety, dopamine agonists exhibited safety profiles exceeding expectations. The overall withdrawal rate for Cabergoline was 2.9% (with no psychotic relapse), for Bromocriptine was 20% (with psychopathology worsening at 13.3%), and for Terguride was 13% (all due to psychopathology worsening).

4 Discussion

Systematic review is an important research method to determine the best sources of evidence. However, only high-quality systematic reviews can provide scientific evidence for use by healthcare providers. The objective of the present review was to conduct an umbrella review of overlapping meta-analyses and systematic reviews of treatments for antipsychotic-induced hyperprolactinemia to determine which article(s) provide the best available evidence for selecting treatments. To date, the Food and Drug Administration (FDA) has not approved any therapeutic strategy for the treatment of antipsychotic-induced hyperprolactinemia. Therefore, it is very important to summarize the findings and quality of previous clinical studies, in order to help clinicians choose the most suitable treatment for their patients. From our literature searches, five articles were included in this umbrella review, and these meta-analyses reported that aripiprazole, metformin and dopamine agonists may be effective at reducing prolactin concentrations in patients with antipsychotic-induced hyperprolactinemia.

Aripiprazole as a dopamine receptor stabilizer is widely regarded as having the ability to lower serum prolactin levels. In a meta-analysis of 32 RCTs examining various antipsychotics’ impact on prolactin levels in children and adolescents, it was found that only aripiprazole significantly decreased serum prolactin levels (32). Moreover, aripiprazole is supported by the most extensive clinical evidence for treating antipsychotic-induced hyperprolactinemia. The Chinese Society of Neuroscience & Psychiatry, Schizophrenia Clinical Research Alliance released a consensus on the management of antipsychotic-induced hyperprolactinemia in 2021 (20). In the consensus, adjunctive aripiprazole was hailed as the most effective intervention among all therapeutic measures. This conclusion aligns with the findings from this umbrella review. All the clinical evidence included in this review once again validates the safety and efficacy of adjunctive aripiprazole for the treatment of antipsychotic-induced hyperprolactinemia. Currently, there is no conclusive evidence for the optimal dosage of aripiprazole in treating hyperprolactinemia, but most studies suggest that low-dose aripiprazole have advantages over higher doses. This may be related to the fact that low-dose aripiprazole have already occupied most D2 receptors in the striatum (33). More large-sample clinical studies are needed to further explore the dose-response relationship of aripiprazole in treating hyperprolactinemia. It is noteworthy that the decrease in serum prolactin abnormalities induced by aripiprazole may serve as a biomarker for the rebound of positive symptoms in patients with schizophrenia. A clinical study suggests that after switching to aripiprazole treatment, patients with abnormally low prolactin levels experience a significantly higher rebound rate of psychotic symptoms compared to patients without abnormally low prolactin levels (34). Therefore, monitoring serum prolactin levels during treatment may help predict later rebound of psychotic symptoms.

As a first-line drug for diabetes, the effects of metformin for improving antipsychotic-induced weight gain and abnormal glucose and lipid metabolism had been demonstrated by many studies (35). However, its effect on hyperprolactinemia has not been clearly established. One study showed that metformin can improve the endogenous dopaminergic tone in female patients with polycystic ovary syndrome (36). Building on this potential mechanism, developing studies have focused on whether metformin can reduce prolactin levels. The limited clinical evidence provided by the two meta-analyses included in our review (29, 30) suggests that metformin shows promise as a treatment for antipsychotic-induced hyperprolactinemia. Although the current evidence for the adjunctive metformin in the treatment of hyperprolactinemia is insufficient, there have been an increasing number of clinical trials exploring its effectiveness and safety as a potential drug. Recently, a randomized controlled trial assessed the efficacy of metformin in treating hyperprolactinemia induced by amisulpride, yielding positive conclusions that metformin can effectively reduce serum prolactin levels without significant adverse effects (37). This study once again provided compelling clinical evidence for the efficacy of metformin in reducing prolactin. Additionally, clinical evidence suggests that metformin, while improving antipsychotic-induced metabolic syndrome in patients with schizophrenia, also has a role in improving psychiatric and cognitive symptoms (38). This indicates that the benefits of metformin for patients may be multidimensional and worth exploring further. In the future, more research should focus on the potential of metformin, thereby expanding the possibilities for treating antipsychotic-induced hyperprolactinemia.

Dopamine agonists have been regarded as an important treatment of hyperprolactinemia since the invention of bromocriptine (39). In addition to drug-induced hyperprolactinemia, dopamine agonists have established indications for treatment of physiological hyperprolactinemia and hyperprolactinemia caused by pituitary prolactin adenoma and other reasons. However, the mechanisms of action of dopamine agonists and antipsychotics are conflicting to a certain extent. Dopamine agonists were reported to potentially aggravate schizophrenia (40, 41). For this reason, when considering adjunctive dopamine receptor agonists for the treatment of hyperprolactinemia, special attention should be paid to the drug’s safety profile. In the present umbrella review, Labad et al. (31) assessed the safety and efficacy of adding dopamine agonists and reported psychopathological worsening rates of 13.3% for bromocriptine and 13% for terguride, but no psychotic relapses in patients treated with cabergoline. While these rates of psychopathological worsening were lower than expected, this outcome was consistent with an earlier study exploring the safety of dopamine agonists (42), in which only 8 cases (1.3%) experienced psychotic side effects in a sample of 600 patients using dopamine agonists. Another study reviewed four pediatric cases of risperidone-induced hyperprolactinemia treated with cabergoline and found that cabergoline was well tolerated (43). These studies suggest that dopamine receptor agonists are generally safe for psychiatric patients.

Presently, in the treatment of antipsychotic-induced hyperprolactinemia, existing clinical studies are evolving in two directions. Firstly, by substantiating reliable treatment methods with larger sample sizes, such as adjunctive aripiprazole, or by conducting more in-depth subgroup analyses to explore optimal treatment dosages. Secondly, by attempting to introduce more treatment methods to explore diverse treatment modalities. This suggests that antipsychotic-induced hyperprolactinemia is increasingly drawing attention from clinicians, and investigating its diverse and standardized treatment methods will hold significant clinical value. With the progress of studies, some novel treatment approaches are also gaining increased attention, such as adding the Peony-Glycyrrhiza decoction (PGD) (44), adjunctive high-dose vitamin B6 (45), and so on.

PGD is a traditional Chinese medicine formulated with peony and glycyrrhiza. It is believed to have the effect of reversing the decrease in estradiol levels caused by prolactin (46). A prior network meta-analysis assessed the efficacy of PGD in reducing prolactin levels, suggesting that while PGD may not be as effective as aripiprazole, it still has a significant effect in lowering prolactin levels. Furthermore, in subgroup analysis, PGD demonstrated more notable effects than other treatments in patients with risperidone-induced hyperprolactinemia (47). The findings confirmed the effectiveness of PGD treatment while also introducing a new concept that there may be different underlying mechanisms for hyperprolactinemia induced by different antipsychotics, thus requiring consideration of diverse treatments.

Vitamin B6 plays a crucial role in cellular metabolism and stress response. Clinical research has now begun to explore its clinical value in treating hyperprolactinemia (45). A recent network meta-analysis comprehensively evaluated all treatment measures for hyperprolactinemia, affirming the effectiveness of traditional methods such as aripiprazole while also proposing the potential of high-dose B6 treatment for hyperprolactinemia. Moreover, the study indicated that different treatments have varying efficacy for patients with different prolactin levels, and patients with initial prolactin levels below 50 ng/ml may not require specific interventions (48). This suggests that in the future, a more precise treatment model for hyperprolactinemia should consider the initial prolactin levels of patients.

5 Limitations

This umbrella review has some limitations. Firstly, we only included meta-analyses and systematic reviews, and thus, it was not possible to examine outcomes at the patient level. Secondly, due to the low number of RCTs included in some articles, meta-analysis could not be conducted, thus reducing the quality. Thirdly, some articles included and analyzed low-quality RCTs, which may affect the validity of the conclusions.

6 Conclusion

Adding aripiprazole or a dopamine agonist can effectively and safely improve antipsychotic-induced hyperprolactinemia. There is clinical evidence indicating that adjunctive metformin can also reduce the serum prolactin concentration, but more clinical trials are needed to confirm this finding. Adjunctive dopamine agonists have been proven to be effective and safe for the treatment of antipsychotic-induced hyperprolactinemia. Among those evaluated, aripiprazole may be the most appropriate.

Author contributions

QJ: Writing – original draft. TL: Data curation, Writing – review & editing. LZ: Methodology, Supervision, Writing – review & editing. YS: Data curation, Writing – review & editing. ZM: Investigation, Methodology, Writing – review & editing. YX: Investigation, Data curation, Writing – review & editing. CW: Supervision, Writing – review & editing. QB: Conceptualization, Supervision, Writing – review & editing.

Funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This study was funded by Beijing Hospitals Authority Clinical medicine Development of special funding support (ZLRK202335).

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

References

1. Jauhar S, Johnstone M, McKenna PJ. Schizophrenia. Lancet (London England). (2022) 399:473–86. doi: 10.1016/S0140-6736(21)01730-X

PubMed Abstract | CrossRef Full Text | Google Scholar

2. Lisoway AJ, Chen CC, Zai CC, Tiwari AK, Kennedy JL. Toward personalized medicine in schizophrenia: Genetics and epigenetics of antipsychotic treatment. Schizophr Res. (2021) 232:112–24. doi: 10.1016/j.schres.2021.05.010

PubMed Abstract | CrossRef Full Text | Google Scholar

3. Lieberman JA, Bymaster FP, Meltzer HY, Deutch AY, Duncan GE, Marx CE, et al. Antipsychotic drugs: comparison in animal models of efficacy, neurotransmitter regulation, and neuroprotection. Pharmacol Rev. (2008) 60:358–403. doi: 10.1124/pr.107.00107

PubMed Abstract | CrossRef Full Text | Google Scholar

4. Missale C, Nash SR, Robinson SW, Jaber M, Caron MG. Dopamine receptors: from structure to function. Physiol Rev. (1998) 78:189–225. doi: 10.1152/physrev.1998.78.1.189

PubMed Abstract | CrossRef Full Text | Google Scholar

5. Beaulieu JM, Gainetdinov RR. The physiology, signaling, and pharmacology of dopamine receptors. Pharmacol Rev. (2011) 63:182–217. doi: 10.1124/pr.110.002642

PubMed Abstract | CrossRef Full Text | Google Scholar

6. Meltzer HY. New trends in the treatment of schizophrenia. CNS Neurol Disord Drug Targets. (2017) 16:900–6. doi: 10.2174/1871527316666170728165355

PubMed Abstract | CrossRef Full Text | Google Scholar

7. Halbreich U, Kinon BJ, Gilmore JA, Kahn LS. Elevated prolactin levels in patients with schizophrenia: mechanisms and related adverse effects. Psychoneuroendocrinology. (2003) 28 Suppl 1:53–67. doi: 10.1016/s0306-4530(02)00112-9

PubMed Abstract | CrossRef Full Text | Google Scholar

8. Society TCN. [Consensus on diagnosis and treatment of hyperprolactin]. Natl Med J China. (2011) 91:147–54. doi: 10.3760/cma.j.issn.0376-2491.2011.03.002

CrossRef Full Text | Google Scholar

9. Peveler RC, Branford D, Citrome L, Fitzgerald P, Harvey PW, Holt RI, et al. Antipsychotics and hyperprolactinaemia: clinical recommendations. J Psychopharmacol (Oxford England). (2008) 22:98–103. doi: 10.1177/0269881107087346

CrossRef Full Text | Google Scholar

10. Halbreich U, Kahn LS. Hyperprolactinemia and schizophrenia: mechanisms and clinical aspects. J Psychiatr Practice. (2003) 9:344–53. doi: 10.1097/00131746-200309000-00003

CrossRef Full Text | Google Scholar

11. Montejo ÁL, Arango C, Bernardo M, Carrasco JL, Crespo-Facorro B, Cruz JJ, et al. Multidisciplinary consensus on the therapeutic recommendations for iatrogenic hyperprolactinemia secondary to antipsychotics. Front Neuroendocrinol. (2017) 45:25–34. doi: 10.1016/j.yfrne.2017.02.003

PubMed Abstract | CrossRef Full Text | Google Scholar

12. Holt RI, Peveler RC. Antipsychotics and hyperprolactinaemia: mechanisms, consequences and management. Clin Endocrinol. (2011) 74:141–7. doi: 10.1111/j.1365-2265.2010.03814.x

CrossRef Full Text | Google Scholar

13. Kinon BJ, Gilmore JA, Liu H, Halbreich UM. Prevalence of hyperprolactinemia in schizophrenic patients treated with conventional antipsychotic medications or risperidone. Psychoneuroendocrinology. (2003) 28 Suppl 2:55–68. doi: 10.1016/s0306-4530(02)00127-0

PubMed Abstract | CrossRef Full Text | Google Scholar

14. Montgomery J, Winterbottom E, Jessani M, Kohegyi E, Fulmer J, Seamonds B, et al. Prevalence of hyperprolactinemia in schizophrenia: association with typical and atypical antipsychotic treatment. J Clin Psychiatry. (2004) 65:1491–8. doi: 10.4088/jcp.v65n1108

PubMed Abstract | CrossRef Full Text | Google Scholar

15. Seeman P. Atypical antipsychotics: mechanism of action. Can J Psychiatry Rev Can Psychiatrie. (2002) 47:27–38. doi: 10.1177/070674370204700106

CrossRef Full Text | Google Scholar

16. Kapur S, Langlois X, Vinken P, Megens AA, De Coster R, Andrews JS. The differential effects of atypical antipsychotics on prolactin elevation are explained by their differential blood-brain disposition: a pharmacological analysis in rats. J Pharmacol Exp Ther. (2002) 302:1129–34. doi: 10.1124/jpet.102.035303

PubMed Abstract | CrossRef Full Text | Google Scholar

17. Redman B, Kitchen C, Johnson KW, Bezwada P, Kelly DL. Levels of prolactin and testosterone and associated sexual dysfunction and breast abnormalities in men with schizophrenia treated with antipsychotic medications. J Psychiatr Res. (2021) 143:50–3. doi: 10.1016/j.jpsychires.2021.08.022

PubMed Abstract | CrossRef Full Text | Google Scholar

18. Zhang C, Mao Y, Song L. Precise treatments for schizophrenia: where is the way forward? Gen Psychiatry. (2018) 31:e000002. doi: 10.1136/gpsych-2018-000002

CrossRef Full Text | Google Scholar

19. Rusgis MM, Alabbasi AY, Nelson LA. Guidance on the treatment of antipsychotic-induced hyperprolactinemia when switching the antipsychotic is not an option. Am J Health-system Pharmacy: AJHP: Off J Am Soc Health-System Pharmacists. (2021) 78:862–71. doi: 10.1093/ajhp/zxab065

CrossRef Full Text | Google Scholar

20. Chinese Society of Neuroscience & Psychiatry SCRA. Consensus on the management of antipsychotic−induced hyperprolactinemia. Chin J Psychiatry. (2021) 54:163–9. doi: 10.3760/cma.j.cn113661-20201219-00514

CrossRef Full Text | Google Scholar

21. Croxtall JD. Aripiprazole: a review of its use in the management of schizophrenia in adults. CNS Drugs. (2012) 26:155–83. doi: 10.2165/11208400-000000000-00000

PubMed Abstract | CrossRef Full Text | Google Scholar

22. Zhang CH, Ma K, Yuan BC, Yuan Y, Chen YX. Bushen Huoxue herbal medicine for treating hyperprolactinemia in women: a Meta-analysis. China J Chin Mater Med. (2019) 44:1087–93. doi: 10.19540/j.cnki.cjcmm.20190125.001

CrossRef Full Text | Google Scholar

23. Wei Y, La L, Wang L, Batey R, Wang C, Li Y. Paeoniflorin and liquiritin, two major constituents in Chinese herbal formulas used to treat hyperprolactinemia-associated disorders, inhibits prolactin secretion in prolactinoma cells by different mechanisms. J Ethnopharmacol. (2017) 204:36–44. doi: 10.1016/j.jep.2017.03.054

PubMed Abstract | CrossRef Full Text | Google Scholar

24. Huang X, Ren L, Hou L, Fan H, Wang C, Wang C, et al. Paeoniflorin ameliorates antipsychotic-induced hyperprolactinemia in rats by attenuating impairment of the dopamine D2 receptor and TGF-β1 signaling pathways in the hypothalamus and pituitary. J Ethnopharmacol. (2020) 257:112862. doi: 10.1016/j.jep.2020.112862

PubMed Abstract | CrossRef Full Text | Google Scholar

25. Moher D, Liberati A, Tetzlaff J, Altman DG. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. BMJ (Clin Res ed). (2009) 339:b2535. doi: 10.1136/bmj.b2535

CrossRef Full Text | Google Scholar

26. Shea BJ, Grimshaw JM, Wells GA, Boers M, Andersson N, Hamel C, et al. Development of AMSTAR: a measurement tool to assess the methodological quality of systematic reviews. BMC Med Res Methodol. (2007) 7:10. doi: 10.1186/1471-2288-7-10

PubMed Abstract | CrossRef Full Text | Google Scholar

27. Li X, Tang Y, Wang C. Adjunctive aripiprazole versus placebo for antipsychotic-induced hyperprolactinemia: meta-analysis of randomized controlled trials. PloS One. (2013) 8:e70179. doi: 10.1371/journal.pone.0070179

PubMed Abstract | CrossRef Full Text | Google Scholar

28. Meng M, Li W, Zhang S, Wang H, Sheng J, Wang J, et al. Using aripiprazole to reduce antipsychotic-induced hyperprolactinemia: meta-analysis of currently available randomized controlled trials. Shanghai Arch Psychiatry. (2015) 27:4–17. doi: 10.11919/j.issn.1002-0829.215014

PubMed Abstract | CrossRef Full Text | Google Scholar

29. Bo QJ, Wang ZM, Li XB, Ma X, Wang CY, de Leon J. Adjunctive metformin for antipsychotic-induced hyperprolactinemia: A systematic review. Psychiatry Res. (2016) 237:257–63. doi: 10.1016/j.psychres.2016.01.031

PubMed Abstract | CrossRef Full Text | Google Scholar

30. Zheng W, Yang XH, Cai DB, Ungvari GS, Ng CH, Wang N, et al. Adjunctive metformin for antipsychotic-related hyperprolactinemia: A meta-analysis of randomized controlled trials. J Psychopharmacol (Oxford England). (2017) 31:625–31. doi: 10.1177/0269881117699630

CrossRef Full Text | Google Scholar

31. Labad J, Montalvo I, Gonzalez-Rodriguez A, Garcia-Rizo C, Crespo-Facorro B, Monreal JA, et al. Pharmacological treatment strategies for lowering prolactin in people with a psychotic disorder and hyperprolactinaemia: A systematic review and meta-analysis. Schizophr Res. (2020) 222:88–96. doi: 10.1016/j.dib.2020.105904

PubMed Abstract | CrossRef Full Text | Google Scholar

32. Krøigaard SM, Clemmensen L, Tarp S, Pagsberg AK. A meta-analysis of antipsychotic-induced hypo- and hyperprolactinemia in children and adolescents. J Child Adolesc Psychopharmacol. (2022) 32:374–89. doi: 10.1089/cap.2021.0140

PubMed Abstract | CrossRef Full Text | Google Scholar

33. Gründer G, Fellows C, Janouschek H, Veselinovic T, Boy C, Bröcheler A, et al. Brain and plasma pharmacokinetics of aripiprazole in patients with schizophrenia: an [18F]fallypride PET study. Am J Psychiatry. (2008) 165:988–95. doi: 10.1176/appi.ajp.2008.07101574

PubMed Abstract | CrossRef Full Text | Google Scholar

34. Jen YW, Hwang TJ, Chan HY, Hsieh MH, Liu CC, Liu CM, et al. Abnormally low prolactin levels in schizophrenia patients after switching to aripiprazole in a randomized trial: a biomarker for rebound in psychotic symptoms? BMC Psychiatry. (2020) 20:552. doi: 10.1186/s12888-020-02957-7

PubMed Abstract | CrossRef Full Text | Google Scholar

35. Bushe CJ, Bradley AJ, Doshi S, Karagianis J. Changes in weight and metabolic parameters during treatment with antipsychotics and metformin: do the data inform as to potential guideline development? A systematic review of clinical studies. Int J Clin Practice. (2009) 63:1743–61. doi: 10.1111/ijcp.2009.63.issue-12

CrossRef Full Text | Google Scholar

36. Ortega-González C, Cardoza L, Coutiño B, Hidalgo R, Arteaga-Troncoso G, Parra A. Insulin sensitizing drugs increase the endogenous dopaminergic tone in obese insulin-resistant women with polycystic ovary syndrome. J Endocrinol. (2005) 184:233–9. doi: 10.1677/joe.1.05844

PubMed Abstract | CrossRef Full Text | Google Scholar

37. Zhu C, Li R, Ju M, Xiao X, Yuan TF, Jin Z, et al. Metformin in the treatment of amisulpride-induced hyperprolactinemia: A clinical trial. Front Mol Neurosci. (2022) 15:892477. doi: 10.3389/fnmol.2022.892477

PubMed Abstract | CrossRef Full Text | Google Scholar

38. Battini V, Cirnigliaro G, Leuzzi R, Rissotto E, Mosini G, Benatti B, et al. The potential effect of metformin on cognitive and other symptom dimensions in patients with schizophrenia and antipsychotic-induced weight gain: a systematic review, meta-analysis, and meta-regression. Front Psychiatry. (2023) 14:1215807. doi: 10.3389/fpsyt.2023.1215807

PubMed Abstract | CrossRef Full Text | Google Scholar

39. Dekkers OM, Lagro J, Burman P, Jørgensen JO, Romijn JA, Pereira AM. Recurrence of hyperprolactinemia after withdrawal of dopamine agonists: systematic review and meta-analysis. J Clin Endocrinol Metab. (2010) 95:43–51. doi: 10.1210/jc.2009-1238

PubMed Abstract | CrossRef Full Text | Google Scholar

40. Dorevitch A, Aronzon R, Stark M. Psychotic exacerbation attributed to low-dose bromocriptine treatment of galactorrhea and hyperprolactinemia. Acta Obstetricia Gynecol Scandinavica. (1991) 70:375–6. doi: 10.3109/00016349109007893

CrossRef Full Text | Google Scholar

41. Snellen M, Power J, Blankley G, Galbally M. Pharmacological lactation suppression with D2 receptor agonists and risk of postpartum psychosis: A systematic review. Aust New Z J Obstetrics Gynaecol. (2016) 56:336–40. doi: 10.1111/ajo.12479

CrossRef Full Text | Google Scholar

42. Turner TH, Cookson JC, Wass JA, Drury PL, Price PA, Besser GM. Psychotic reactions during treatment of pituitary tumours with dopamine agonists. Br Med J (Clin Res ed). (1984) 289:1101–3. doi: 10.1136/bmj.289.6452.1101

PubMed Abstract | CrossRef Full Text | Google Scholar

43. Cohen LG, Biederman J. Treatment of risperidone-induced hyperprolactinemia with a dopamine agonist in children. J Child Adolesc Psychopharmacol. (2001) 11:435–40. doi: 10.1089/104454601317261618

PubMed Abstract | CrossRef Full Text | Google Scholar

44. Yang P, Li L, Yang D, Wang C, Peng H, Huang H, et al. Effect of peony-glycyrrhiza decoction on amisulpride-induced hyperprolactinemia in women with schizophrenia: A preliminary study. Evidence-Based Complementary Altern Med: eCAM. (2017) 2017:7901670. doi: 10.1155/2017/7901670

CrossRef Full Text | Google Scholar

45. Zhuo C, Xu Y, Wang H, Fang T, Chen J, Zhou C, et al. Safety and efficacy of high-dose vitamin B6 as an adjunctive treatment for antipsychotic-induced hyperprolactinemia in male patients with treatment-resistant schizophrenia. Front Psychiatry. (2021) 12:681418. doi: 10.3389/fpsyt.2021.681418

PubMed Abstract | CrossRef Full Text | Google Scholar

46. Yamada K, Kanba S, Yagi G, Asai M. Effectiveness of herbal medicine (shakuyaku-kanzo-to) for neuroleptic-induced hyperprolactinemia. J Clin Psychopharmacol. (1997) 17:234–5. doi: 10.1097/00004714-199706000-00025

PubMed Abstract | CrossRef Full Text | Google Scholar

47. Zhang L, Qi H, Xie YY, Zheng W, Liu XH, Cai DB, et al. Efficacy and safety of adjunctive aripiprazole, metformin, and paeoniae-glycyrrhiza decoction for antipsychotic-induced hyperprolactinemia: A network meta-analysis of randomized controlled trials. Front Psychiatry. (2021) 12:728204. doi: 10.3389/fpsyt.2021.728204

PubMed Abstract | CrossRef Full Text | Google Scholar

48. Lu Z, Sun Y, Zhang Y, Chen Y, Guo L, Liao Y, et al. Pharmacological treatment strategies for antipsychotic-induced hyperprolactinemia: a systematic review and network meta-analysis. Trans Psychiatry. (2022) 12:267. doi: 10.1038/s41398-022-02027-4

CrossRef Full Text | Google Scholar

Keywords: antipsychotic, hyperprolactinemia, adverse effects, aripiprazole, metformin, dopamine agonists, umbrella review

Citation: Jiang Q, Li T, Zhao L, Sun Y, Mao Z, Xing Y, Wang C and Bo Q (2024) Treatment of antipsychotic-induced hyperprolactinemia: an umbrella review of systematic reviews and meta-analyses. Front. Psychiatry 15:1337274. doi: 10.3389/fpsyt.2024.1337274

Received: 12 November 2023; Accepted: 21 February 2024;
Published: 05 March 2024.

Edited by:

Hiroyoshi Takeuchi, Keio University, Japan

Reviewed by:

Adam Gędek, Institute of Psychiatry and Neurology, Poland
Octavian Vasiliu, Carol Davila University Emergency Military Central Hospital, Romania

Copyright © 2024 Jiang, Li, Zhao, Sun, Mao, Xing, Wang and Bo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Qijing Bo, bqj718@163.com

Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.