Efficacy and Safety of On-Demand Clomipramine for the Treatment of Premature Ejaculation

The Journal of Urology:

Clomipramine is a tricyclic antidepressant (TCA) that has been found effective at a daily dose of 25 mg or 50 mg for premature ejaculation (PE) in multiple studies.

Additionally, TCAs can carry significant side effects such as dizziness, dry mouth, and constipation.

As a result, on-demand treatment is greatly preferred, especially when cost is taken into account.

This phase III double-blind randomized controlled trial provides much-needed evidence establishing the effectiveness of on-demand clomipramine for PE. 

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The aim of the present trial is to assess the efficacy of on-demand clomipramine 15 mg administered before sexual intercourse for the treatment of premature ejaculation (PE).

This study randomized men with premature ejaculation (PE) to either low-dose (15 mg) clomipramine, a tricyclic antidepressant, or placebo and measured efficacy using Intravaginal Ejaculation Latency Time (IELT) and the Premature Ejaculation Diagnostic Tool (PEDT). 

Investigators found treatment with clomipramine resulted in marked improvements in both IELT and PEDT. Low-dose clomipramine was well-tolerated, with no observed serious adverse events. 

Although on-demand dosing is theoretically less toxic than daily dosing, nearly half of the men in the treatment group (49/102, or 48%) had a side effect. The authors did mention that most of the side effects were mild and resolved without medical intervention

This study demonstrated that on-demand oral clomipramine is a highly desirable treatment for PE. On-demand oral clomipramine significantly increased the IELT and only needed to be taken several times a month, at times when intercourse was desired.

These data suggest that on-demand low-dose clomipramine is a safe and effective treatment for PE. 

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Purpose: The aim of the current trial was to assess the efficacy of on demand clomipramine 15 mg administered before sexual intercourse for the treatment of premature ejaculation.

Materials and methods: A total of 159 patients at 5 centers in Korea were randomly assigned to 2 groups. The first group of 53 men received placebo and the second group of 106 received clomipramine 15 mg for 12 weeks. All patients were evaluated at the beginning of the study and every 4 weeks thereafter. Patients were instructed to ingest a tablet approximately 2 to 6 hours before sexual intercourse. Efficacy was assessed by scores on the IELT (Intravaginal Ejaculation Latency Time) and the PEDT (Premature Ejaculation Diagnostic Tool).

Results: Analyses of the IELT fold change in each group in the intent to treat population revealed that the IELT of the clomipramine 15 mg group was significantly increased 12 weeks after administration compared with the placebo group. The IELT fold change in the per protocol population also significantly differed between the clomipramine 15 mg group and the placebo group. There was a significant difference in the PEDT scores between the 2 groups (p <0.001). The most commonly reported adverse events were nausea in 15.7% of men and dizziness in 4.9%. Adverse events were mild to moderate in severity.

Conclusions: The results of this multicenter, randomized, double-blind, placebo controlled, fixed dose clinical phase III study suggest that administering clomipramine 15 mg on demand to treat premature ejaculation is effective and safe.

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https://www.auajournals.org/doi/10.1016/j.juro.2018.07.089
https://pubmed.ncbi.nlm.nih.gov/30086277/

This is for informational purposes only. You should consult your clinical textbook for advising your patients.