What should I watch for?
See your doctor or health care professional for a follow-up visit as directed. You may need blood work while you are taking this medicine. Tell your doctor if your symptoms do not improve or if they get worse.
If you have had hepatitis B infection (HBV) in the past, taking this medicine could cause the HBV to become active again. If you have had HBV, your doctor should monitor you with blood tests. Tell your doctor right away if you develop a general ill feeling, light-colored stools, loss of appetite, unusual weakness, or yellowing of the eyes or skin.
Side Effects to watch for
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
- signs and symptoms of liver injury like dark yellow or brown urine; general ill feeling or flu-like symptoms; light-colored stools; loss of appetite; nausea; confusion; right upper belly pain; unusually weak or tired; yellowing of the eyes or skin
Side effects that usually do not require medical attention (Report these to your doctor or health care professional if they continue or are bothersome.):
What may interact with this drug?
Do not take this medicine with the following medication:
- ergot alkaloids like dihydroergotamine, ergonovine, ergotamine, methylergonovine
- female hormones, like estrogens and birth control pills, patches, rings, or injections
- lumacaftor; ivacaftor
- St. John's wort (Hypericum perforatum)
This medicine may also interact with the following medications:
- acetaminophen; hydrocodone
- antiviral medicines for HIV or AIDS
- certain medicines for irregular heart beat like amiodarone, bepridil, diltiazem, disopyramide, flecainide, lidocaine, mexiletine, propafenone, quinidine