 Gestonorone caproate is administered by intramuscular injection, and acts as a long-lasting depot by this route.After an intramuscular injection, gestonorone caproate is completely released from the local depot and is highly bioavailable.A single intramuscular injection of 25 to 50 mg gestonorone caproate in oil solution has been found to have a duration of action of 8 to 13 days in terms of clinical biological effect in the uterus in women.