About medroxyprogesterone acetate
Progestin hormone; contraceptive
Used for
- Long-acting contraception by injection
- Treatment of endometriosis or certain cancers uses different formulations
Usual adult dose
Contraception: 150 mg injected into a muscle every 13 weeks.
Common side effects
- Irregular bleeding or missed periods
- Weight gain
- Headache
- Reduced bone mineral density with prolonged use
Important warnings
- Not effective immediately; use backup contraception when starting as directed.
- May reduce bone density, especially with prolonged use.
- Does not protect against sexually transmitted infections.
- May delay return to fertility after stopping.
Pregnancy
Avoid during pregnancy; it is not used as contraception once pregnancy is known.
Breastfeeding
Generally compatible after the early postpartum period; timing depends on local guidance and individual circumstances.
Interactions
- Some enzyme-inducing medicines may reduce contraceptive effectiveness, including rifampin and certain seizure medicines.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.