What should I watch for?
Check with your doctor or health care professional if you do not get relief from your headaches after using this medicine. You may need to be changed to a different kind of medicine to treat your headaches.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. To reduce dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can increase drowsiness, dizziness and flushing. Avoid alcoholic drinks.
This medicine decreases the circulation of blood to your skin, fingers, and toes. You may get more sensitive to the cold. Elderly patients are more likely to feel this effect. Dress warmly and avoid long exposure to the cold.
If you take migraine medicines for 10 or more days a month, your migraines may get worse. Keep a diary of headache days and medicine use. Contact your healthcare professional if your migraine attacks occur more frequently.
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
- breathing problems
- changes in vision
- chest pain
- cold, discolored hands or feet
- decrease in the amount of urine passed
- fast or slow heartbeat
- high blood pressure
- muscle pains
- numbness, tingling in fingers, toes
- swelling of ankles, feet, hands
- weakness in the legs
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
- nausea, vomiting
What may interact with this drug?
Do not take this medicine with any of the following medications:
- antibiotics like clarithromycin, erythromycin, troleandomycin
- grapefruit juice
- herbal supplements with Ephedra, Ma huang, feverfew
- medicines for colds, congestion
- medicines for fungal infections like ketoconazole, itraconazole, posaconazole, and voriconazole
- medicines for migraines or nausea like eletriptan, naratriptan, sumatriptan, zolmitriptan
- medicines or herbal products to decrease weight or appetite
- other ergot alkaloids like dihydroergotamine, ergonovine, methylergonovine
- some medicines for HIV
This medicine may also interact with the following medications: