What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse. It may take time for your condition to improve. You will need tests to check your blood counts and to make sure your body is making the right amount of thyroid hormone.
Women should inform their doctor if they wish to become pregnant or think they might be pregnant. There is a potential for serious side effects to an unborn child. Talk to your health care professional or pharmacist for more information.
If you are going to need surgery or other procedure, tell your doctor that you are using this medicine.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
black, tarry stools
increase or decrease in urination
painful or difficult urination
shortness of breath
sores, ulcers, or white spots on the lips or in the mouth
swelling of the feet or lower legs
unusual bleeding or bruising
unusual tiredness or weakness
Incidence not known
Abdominal or stomach pain
blood in the urine or stool
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
difficulty with moving
general feeling of discomfort or weakness
loss of appetite and weight
lower back or side pain
muscle aching or cramping
muscle pain or stiffness
numbness or tingling of the hands, feet, or face
pinpoint red spots on the skin
swollen salivary glands
swollen, painful, or tender lymph glands in the neck, armpit, or groin
tightness in the chest
yellow eyes or skin
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.