Study summary

An acne drug was followed by sperm appearing in some men, in two small studies

Isotretinoin studies · Two small studies · Reviewed 2026

44%had detectable sperm afterwards

What was tested

Isotretinoin, a form of vitamin A used for acne, taken by men with very low or no sperm. Vitamin A signalling is needed to start sperm maturation. No comparison groups.

What they found

44% had detectable sperm and 37% had sperm usable from the ejaculate.
Men whose sperm production stalls partway (maturation arrest) responded most.
Neither study had an untreated group.

What it means

An inexpensive idea worth a controlled trial. Not established treatment.

University of Nebraska review ↗ ← Back to the outlook

Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.