Megestrol is a progestogen hormone. It is used to treat breast cancer and endometrial cancer, and sometimes other conditions.
Take megestrol regularly as directed with a glass of water. You can take it with or without food.
If it is nearly time for your next dose, skip the missed dose and take your next dose at the usual time. Otherwise, take the missed dose as soon as you remember. Do not take two doses at the same time.
Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. St John's wort) or recreational drugs.
| Side Effects | Recommended action |
|---|---|
|
Symptoms of a blood clot including: sudden shortness of breath, swelling or pain in one leg |
Tell your doctor immediately |
|
Changes in periods, unexpected vaginal bleeding Mood changes Hot flushing, sweating Headache Weight gain Stomach upset Trouble getting or keeping an erection, less interest in sex |
Tell your doctor if troublesome |
If you notice any other effects, discuss them with your doctor or pharmacist.
This leaflet contains important, but not all, information about this medicine.
Prepared by the MyMedicines Committee at Christchurch Hospital, Te Whatu Ora - Waitaha, New Zealand. May 2026
For more general information about this sheet and its contents, see: What does a My Medicines sheet cover?
Te Reo Māori information sheets supported by Health Quality and Safety Commission New Zealand
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My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.
For more information about the sheets, see: What does a My Medicines sheet cover?
My Medicines is developed by a team at Te Whatu Ora – Waitaha. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed