Drug information provided by: Merative, Micromedex®

It is very important that your doctor check your progress closely while you are receiving this medicine. This is to see if the medicine is working properly and to allow for a change in the dose. Blood tests may be needed to check for any unwanted effects.

Using this medicine could harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. Tell your doctor right away if you think you have become pregnant.

Do not use this medicine together with clarithromycin (Biaxin®), erythromycin (Erythrocin®), indinavir (Crixivan®), itraconazole (Sporanox®), ketoconazole (Nizoral®), nelfinavir (Viracept®), ritonavir (Norvir®), or troleandomycin (Tao®).

This medicine may cause brain problems (eg, cerebral ischemia). Check with your doctor right away if you have confusion, headache, sudden, severe, and continuing, or nausea and vomiting.

This medicine may cause stomach problems (eg, retroperitoneal fibrosis). Check with your doctor right away if you have continuing or severe stomach pain, increased frequency of urination, continuing loss of appetite, lower back pain, continuing or severe nausea and vomiting, or weakness.

If you think you or someone else may have taken an overdose of this medicine, get emergency help at once. Signs of an overdose include: blurred vision, change in consciousness, confusion, dizziness, faintness, or lightheadedness when getting up suddenly from a lying position, hallucinations, headache, holding false beliefs that cannot be changed by fact, nervousness, numbness, tingling, pain, and bluish color of the fingernails, lips, skin, palms, or nail beds, irregular, fast or slow, or shallow breathing, loss of consciousness, pale, clammy skin, pounding in the ears, seizures, stomach pain, sweating, trouble breathing, unusual excitement, nervousness, or restlessness, unusual tiredness or weakness, or vomiting.

This medicine may be habit-forming. If you feel that the medicine is not working as well, do not use more than your prescribed dose. Call your doctor for instructions.

Check with your doctor right away if you have chest pain or tightness, or trouble breathing. These may be symptoms of a lung problem (eg, pleural fibrosis).

This medicine may raise your risk of having a heart attack. This is more likely in people who already have heart disease. People who use this medicine for a long time might also have a higher risk. Check with your doctor right away if you are having chest pain or discomfort, nausea or vomiting, pain or discomfort in the arms, jaw, back, or neck, slurred speech, trouble breathing, or weakness.

Your blood pressure might get too high while you are using this medicine. This may cause headaches, dizziness, or blurred vision. You might need to measure your blood pressure at home. If you think your blood pressure is too high, call your doctor right away.

Using too much of this medicine or any other migraine medicines (eg, triptans, opioids, or a combination treatment for 10 or more days per month) may worsen your headache. Talk to your doctor about this risk. It may also be helpful to note of how often your migraine attacks occur and how much medicines you use.

This medicine may cause irritation in the nose, throat, or problems in taste. Check with your doctor right away if you have bloody nose, burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings, or burning, stinging, itching, redness, or irritation.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.