Diazepam (vaginal/pelvic use)

Also known as: diazepam, Valium (branded)

Sexual Well-Being

In plain English

Diazepam is a medicine that relaxes muscles and reduces anxiety. As a vaginal suppository it is used to relax tight pelvic-floor muscles that cause painful sex or pelvic pain. Some patients report improvement, but rigorous studies have not clearly shown it works better than a placebo. It is a controlled substance and used cautiously alongside physical therapy.

The science

Diazepam is a benzodiazepine that enhances GABA-A receptor activity, producing muscle relaxation, anxiolysis, and sedation; vaginal suppositories aim to relax hypertonic pelvic-floor musculature locally in high-tone pelvic-floor dysfunction and associated dyspareunia. Evidence is mixed: a retrospective series (Rogalski 2010) reported subjective and tone improvements, but randomized, placebo-controlled trials (Crisp 2013; Holland 2019) and a subsequent systematic review found no significant advantage over placebo in resting EMG tone or symptom scores. Systemic absorption occurs and can cause sedation, and diazepam is a Schedule IV controlled substance with dependence potential; abrupt discontinuation after regular use can cause withdrawal. Vaginal diazepam is off-label and not an FDA-approved formulation; it is generally reserved as an adjunct to pelvic-floor physical therapy given the weak efficacy evidence.

References

• Crisp et al., Int Urogynecol J 2013 (intravaginal diazepam RCT)
• Rogalski et al., Int Urogynecol J 2010 (vaginal diazepam chart review)