Adjuvant administration probiotic effects on sexual function in depressant men undergoing selective serotonin reuptake inhibitor treatment: a double-blinded randomized controlled trial.

Seyed-Abdolvahab Taghavi, Mohammad Sadri, Mahdyeh Hashemimohammadabad, Nazir Hashemimohammadabad, Zeinab Hashemimohammadabad, Fatemeh Bazarganipour

Journal: The journal of sexual medicine 2026;23(5):

PMID: 42059569

Abstract

BACKGROUND

Depression is a common psychiatric disorder worldwide, often linked to complications like impaired sexual function.

AIM

To determine the effect of the probiotic Lactofem combined with Escitalopram on severity of depression and sexual function in men diagnosed with mild to moderate depression undergoing SSRI treatment.

METHODS

In a randomized controlled trial, 240 men with mild to moderate depression were assigned to 2 groups. The intervention group (119 participants) received Lactofem alongside Escitalopram, while the control group (121 participants) received only Escitalopram for 2 months.

OUTCOMES

Depression severity was measured by the Hamilton Depression Rating Scale (HDRS) and Beck Depression Inventory (BDI). Sexual function was assessed using the International Index of Erectile Function (IIEF) questionnaire at baseline and after treatment.

RESULTS

Both groups showed significant improvement in depression scores (P < .05). The Lactofem group had a greater reduction in HDRS (6.42 ± 3.45 vs 8.61 ± 4.15, P < .05) and BDI scores (27.63 ± 4.13 vs 30.24 ± 4.51, P < .05). Sexual function improvements were significantly higher in the intervention group across all domains: erectile function, orgasmic function, sexual desire, intercourse satisfaction, and overall satisfaction (all P < .05).

CLINICAL IMPLICATIONS

Probiotics such as Lactofem may offer benefits as adjunctive therapy to reduce depression symptoms and improve SSRI-induced sexual dysfunction.

STRENGTHS AND LIMITATIONS

Strengths include a rigorous randomized design, validated tools, and large sample size. Limitations are recruitment from a single Iranian clinic with culturally homogenous, married men, absence of placebo, young patient age, and no long-term follow-up.

CONCLUSION

Adding Lactofem to Escitalopram treatment significantly reduces depression severity and enhances sexual function in men with mild to moderate depression.

CLINICAL TRIAL NUMBER

IRCT20160524028038N14, Registration Date: 2024-05-17.

TRIAL REGISTRATION

ClinicalTrials.gov identifier: https://irct.behdasht.gov.ir/trial/67103.

© The Author(s) 2026. Published by Oxford University Press on behalf of The International Society for Sexual Medicine. All rights reserved. For commercial re-use, please contact [email protected] for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact [email protected].

Address: Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj 7591741417, Iran.; Student Research Committee, Yasuj University of Medical Sciences, Yasuj 7591741417, Iran.; College of Medicine, Building 17, Liuyuan, Zhengzhou University, Zhengguan District, Zhengzhou City, Henan Province,310058, China.; Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Islamic Republic Of Iran.; School of Medicine, Zhejiang University, Hangzhou, China.
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