Hot flashes (flushing), increased sweating, night sweats, tiredness, headache, upset stomach, breast changes, acne, joint/muscle aches, trouble sleeping, reduced sexual interest, vaginal discomfort/dryness, swelling of the ankles/feet, dizziness, or mild burning/pain/bruising at the injection site may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
When this medication is used regularly, your menstrual period should stop (or bleeding should get lighter). Menstrual periods usually return within 3 months after treatment is stopped. Tell your doctor promptly if regular periods continue during treatment with leuprolide.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as depression, thoughts of suicide, mood swings, aggression), new/worsening bone pain, easily broken bones.
Get medical help right away if you have any very serious side effects, including: seizures.
Rarely, a very serious problem with your pituitary gland (pituitary apoplexy) may occur, usually in the first hour to 2 weeks after your first injection. Get medical help right away if you have any very serious side effects, including: sudden severe headache, sudden severe mental/mood changes (such as severe confusion, difficulty concentrating), vision changes, severe vomiting, fainting.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.