Before using this medication, tell your doctor or pharmacist if you are allergic to it; or to other ergot alkaloids (such as ergotamine); 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 disease (such as peripheral arterial disease, Raynaud's disease), heart disease (such as coronary artery disease, angina, heart attack), stroke, diabetes, family history of heart disease, high blood pressure, high cholesterol, liver disease, kidney disease, severe blood infection (sepsis), recent blood vessel surgery, stomach/intestinal problems (such as ischemic bowel syndrome), smoking/tobacco use, permanent ending of menstrual periods due to age/surgery/hormonal changes (post-menopausal).

This drug may make you dizzy. Alcohol or marijuana (cannabis) 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 (cannabis). Remember that alcohol may be a cause of headaches.

Using tobacco/nicotine products while using this medication can increase the risk of serious side effects such as heart problems (such as chest pain, fast/slow/irregular heartbeat) and decreased blood supply 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, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using dihydroergotamine. Dihydroergotamine may harm an unborn baby. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication.

This drug may pass into breast milk. Because of the possible risk to the infant, breastfeeding is not recommended while using this drug and for 3 days after the last dose. Consult your doctor before breastfeeding.