Do not take Sumatriptan:

• If you are allergic (hypersensitive) to Sumatriptan, other Triptans, Sulphonamide medications or any of the ingredients listed in the Patient Information Leaflet supplied with your medication. Signs of a hypersensitivity reaction include swelling of the face and mouth (angioedema), breathing problems, chest pain, runny nose, skin rash, or any other allergic type reaction
• If you have a heart problem such as narrowing of the arteries (Ischaemic heart disease) or chest pains (angina), or have already had a heart attack
• If you have circulation problems in your legs that cause cramp-like pains when you walk (peripheral vascular disease)
• If you have had a stroke or a mini-stroke (also called a transient ischaemic attack or TIA)
• If you have high blood pressure. You may be able to use Sumatriptan if your high blood pressure is mild and is being treated
• If you have serious liver disease
• With other Migraine medicines, including those which contain Ergotamine, or similar medicines such as Methysergide; or any Triptan or 5HT₁ agonist (such as Rizatriptan or Zolmitriptan)
• With MAOI anti-depressants or if you have taken an MAOI in the last 2 weeks

Warnings & Precautions

Please note that prolonged or frequent use of Sumatriptan may make your headaches worse.

Talk to your doctor or pharmacist before taking Sumatriptan:

• If you have any extra cardiovascular risk factors: if you are a heavy smoker, or using nicotine replacement therapy, and especially if you are a man aged over 40, or if you are a woman who has been through the menopause
• If you have a history of fits (seizures) or if you have other conditions which might make it more likely that you’ll have a fit – for example, a head injury or alcoholism: tell your prescriber so that you can be supervised more closely
• If you have high blood pressure
• If you have liver or kidney disease
• If you have an intolerance to some sugars
• If you are allergic to Sulphonamide medications
• If you are taking anti-depressants called SSRIs or SNRIs
• If you feel pain or tightness in your chest after you use Sumatriptan. These effects may be intense but they usually pass quickly. If they don’t pass quickly or they become severe, seek medical help immediately

Pregnancy, Breastfeeding, & Fertility

• The use of Sumatriptan in pregnancy is not recommended and should only be considered if the expected benefit to the mother is greater than any possible risk to the foetus
• Breastfeeding should be avoided for 12 hours after taking Sumatriptan, any milk expressed during this time should be discarded

Driving and using machinery

Drowsiness may occur as a result of Migraine or treatment with Sumatriptan. If you are affected, do not drive or operate machinery.