What side effects may I notice from receiving Megestrol Acetate?

Side effects that you should report to your doctor or health care professional as soon as possible:
Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-breathing problems
-dizziness
-increased blood pressure
-signs and symptoms of a blood clot such as breathing problems; changes in vision; chest pain; severe, sudden headache; pain, swelling, warmth in the leg; trouble speaking; sudden numbness or weakness of the face, arm or leg
-swelling of the ankles, feet, hands
-unusually weak or tired
-vomiting

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-breakthrough menstrual bleeding
-changes in sex drive or performance
-diarrhea
-gas
-hot flashes or flushing
-increased appetite
-upset stomach
-weight gain

This list may not describe all possible side effects for Megestrol Acetate. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.