SIDE EFFECTS: Nausea, vomiting, upset stomach, restlessness, trouble sleeping, or dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: slow/fast/irregular heartbeat, numbness/tingling in fingers/toes, blue fingers/toes/nails, cold hands/feet, muscle pain/weakness, severe stomach/abdominal pain, lower back pain, signs of kidney problems (such as change in the amount of urine). Get medical help right away if you have any very serious side effects, including: chest/jaw/left arm pain, confusion, slurred speech, vision changes, weakness on one side of the body. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking this medication, tell your doctor or pharmacist if you are allergic to ergotamine or caffeine; or to other ergot alkaloids (such as dihydroergotamine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood circulation problems (for example, in your legs, arms/hands, or stomach), certain types of headaches (hemiplegic or basilar migraine), heart problems (such as chest pain, irregular heartbeat, previous heart attack), kidney disease, liver disease, personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), stroke or "mini-stroke" (transient ischemic attack). Certain conditions can increase your risk for heart problems. Tell your doctor if you have any of these conditions, including: high blood pressure, high cholesterol, diabetes, family history of heart disease, overweight, postmenopausal (women), age more than 40 years (men). This drug may make you dizzy. Alcohol or marijuana can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana. Remember that alcohol may cause headaches. Using tobacco/nicotine products while using this medication can increase the risk of serious side effects such as heart problems and decreased blood flow to the brain/hands/feet. Do not use tobacco while taking this medication. If you smoke, talk to your doctor about how to stop smoking. Before having surgery or certain medical procedures (such as a heart stress test or a procedure to restore a normal heart rhythm if you have an unusually fast heartbeat), tell your doctor or dentist that you use this medication and about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). This medication must not be used during pregnancy. It may harm an unborn baby. Discuss the use of reliable forms of birth control (such as condoms, birth control pills) with your doctor. If you become pregnant or think you may be pregnant, tell your doctor right away. This drug passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: See also Warning section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. If you also take "triptan" migraine drugs (such as sumatriptan, rizatriptan), you will need to separate your triptan dose from your dose of this medication to lessen the chance of serious side effects. Ask your doctor how long you should wait between your doses of these drugs. Some products may contain caffeine or ingredients that could raise your heart rate or blood pressure. Certain beverages (such as coffee, colas, energy drinks) may also contain caffeine. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products, diet aids, or other headache products). This medication may interfere with certain medical/laboratory tests (including dipyridamole-thallium imaging tests, urine catecholamine/5-HIAA levels), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.

OVERDOSE: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: nausea/vomiting, numbness/tingling in the fingers/toes, chest pain, muscle pain/weakness.