What may interact with this medicine?

• other medicine for the thyroid
• propylthiouracil, PTU

This medicine may also interact with the following medications:

• certain diuretics like spironolactone, triamterene
• certain medicines for high blood pressure or heart failure like enalapril
• lithium
• potassium supplements

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non- prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medicine?

What side effects may I notice from receiving this medicine?

• allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
• breathing problems
• burning in mouth, throat
• chest pain
• fast, irregular heartbeat
• fever with joint pain
• lump or swelling on the neck
• metallic taste
• pain, tingling, numbness in the hands or feet
• unusual aches, pains
• unusual bleeding, bruising
• unusually weak or tired

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

• diarrhea
• headache
• nausea, vomiting
• stomach upset

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

Where should I keep my medicine?

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.