Antidepressants' effects on testosterone and estrogens: What do we know?

Area of Science:

• Neuroendocrinology
• Pharmacology
• Psychiatry

Background:

• Antidepressants are widely used for depression and anxiety, with known sex differences in efficacy and side effects.
• Sex hormones, including testosterone and estrogens, modulate these sex differences in treatment response.
• The interaction between antidepressants and sex hormones is crucial for understanding treatment outcomes.

Purpose of the Study:

• To review existing data on how antidepressants affect testosterone and estrogen levels.
• To analyze the influence of antidepressants on sex hormones in preclinical and clinical studies.
• To highlight the need for further research into sex-specific effects of antidepressants on gonadal hormones.

Main Methods:

• Systematic review of published preclinical and clinical studies.
• Analysis of studies measuring testosterone and estrogen levels after antidepressant administration.
• Evaluation of reported interactions between sex hormones and antidepressants.

Main Results:

• Most antidepressants can influence testosterone and estrogen levels, but findings are conflicting (increase, decrease, or no effect).
• A majority of studies indicate an interaction between sex hormones and antidepressants regarding sexual function, behavior, and depressive symptom relief.
• Many studies focus on male subjects, neglecting the importance of sex as a variable, despite higher prevalence of depression in women.

Conclusions:

• Antidepressants demonstrably affect circulating testosterone and estrogen levels, though the direction and significance of these changes require further investigation.
• The impact of antidepressants on sex hormones may contribute to observed differences in efficacy and side effects between sexes.
• Further research is essential to clarify the effects of antidepressants on both peripheral and central sex hormone levels in males and females, and their clinical implications.