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Sumatriptan (Generic Imigran) Tablets

Available in multiple pack sizes

Looking for Sumatriptan for migraine & headache relief? Chemist4U provides a range of treatment options available with fast, discreet delivery. 

Upon completion of a medical consultation with one of our health care professionals you can expect prices to start from £16.99
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The treatment is inclusive of consultation, private prescription & medicine delivery
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Checked for Accuracy by James O'Loan . CEO & Prescribing Pharmacist . on 20/09/2021

What are Sumatriptan 100mg Tablets?

Sumatriptan is a medication that can help to treat symptoms of migraines and cluster headaches. It is suitable to use when painkillers or non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen have not relieved your symptoms. It belongs to a group of medicines known as triptans or serotonin (5-HT1) agonists. You can take this medicine as soon as your migraine or cluster headache has started. Sumatriptan is only available on prescription. Speak to your doctor to see if Sumatriptan is suitable for you. 

What is a migraine?

A migraine is a headache that causes moderate to severe discomfort that feels like a throbbing pain. It is common to experience pain on one side of your head, but it is possible to feel pain on both sides of your head. Migraines can feel worse when you move and can prevent you from carrying out everyday activities. As well as pain in your head, migraines can also cause:

  • Nausea (feeling sick)

  • Vomiting (being sick)

  • Increased sensitivity to light and sound

  • Sweating 

  • Feeling hot or cold

  • Tummy pain

  • Diarrhoea

Symptoms can last for a few hours up to a few days and may leave you feeling very tired. Although they are unpleasant, migraines aren’t usually something to worry about. However, if your pain can’t be managed with conventional painkillers or your migraines are frequent (more than 5 days within a month), speak to your doctor to find out what treatment options are available to you. 

What is a cluster headache?

Cluster headaches are a rare form of headache that occurs in clusters for around a month or 2 around the same time of year. They can cause intense pain around one eye and can often be experienced with other symptoms such as watering or redness around the eye and a blocked or runny nose. Conventional pain relief doesn’t usually treat the symptoms of cluster headaches, but your doctor would be able to provide treatments to ease pain. 

How can Sumatriptan Tablets help to relieve symptoms of migraines?

Sumatriptan belongs to a group of medicines called triptans which are used to treat symptoms of migraines. It is thought that migraines are caused by the temporary widening of blood vessels in the head. Sumatriptan is believed to reduce the widening of these blood vessels, which helps to reduce symptoms of migraines. This is not a preventative medication and should only be taken when the migraine starts. Sumatriptan usually starts to work within 30-60 minutes. 

How to use this product

Always take this medicine exactly as described by your doctor. The recommended dose for adults is 50mg in the event of a migraine attack. Some patients will require a dose of 100mg - check with your doctor before taking a higher dose. This product is NOT recommended for children under the age of 18 and the elderly.


Take the tablet with water, preferably, as soon as possible after onset of the migraine attack. Do NOT chew or crush or crush the tablets. Speak to your doctor if your dose is too weak or too strong.

Duration of treatment

If symptoms are not reduced after the first dose, you must not take a second dose or the same attack. In the event of a subsequent attack, Sumatriptan can be taken again. If, after the first dose, your symptoms are reduced, but then return you may take a second and third dose, provided you wait at least 2 hours between doses. You must NOT take more than 300mg of Sumatriptan in any 24-hour period. DO NOT TAKE MORE THAN THE RECOMMENDED DOSE.

When not to use this product

Do NOT take this product if you are allergic to any of the ingredients (see ingredients tab for full list) or if you:

  • Have a heart problem, such as narrowing of the arteries, chest pain or have had a heart attack

  • Have circulation problems in your legs that cause cramp-like pains when you walk 

  • Have had a stroke or a mini-stroke

  • Have high blood pressure - you may be able to use Sumatriptan if your high blood pressure is mild and is being treated

  • Have serious liver disease

  • Are taking other migraine medicines, which contain ergotamine or similar medicines such as methysergide or any triptan/5-HT3 receptor agonist (medicines which are also used for treating migraine)

  • Are taking anti-depressants called MAOIs or if you have taken these medicines in the last 2 weeks

Speak to your doctor or a Chemist4U pharmacist BEFORE taking this product if you have any of the below risk factors:

  • Are a heavy smoker or are using nicotine replacement therapy especially

  • If you are a man aged over 40

  • If you are a woman over who has been through the menopause

Always seek advice from your doctor BEFORE you take this medicine if you:

  • Are allergic to antibiotics called sulphonamides

  • Are taking anti-depressants called SSRIs or SNRIs

Can I take this Sumatriptan with other medicines?

Tell your doctor pharmacist if you’re taking any other medicines or have recently taken or might take any other medicines. You MUST tell your doctor if you are taking:

  • Ergotamine (also used to treat migraine) or similar medicines, such as methysergide

  • Other triptans

  • SSRIs or SNRIs

  • MAOIs

  • St John’s Wort

Can I take this product when pregnant or breast-feeding

If you are pregnant or breast-feeding, think you might be pregnant or are planning to have a baby, ask your doctor for advice before taking this medicine. There is only limited information about the safety of sumatriptan for pregnant women. Your doctor will discuss whether this medicine is suitable for you. Do NOT breast-feed your baby for 12 hours after using Sumatriptan - if you express any breast milk during this time, discard the milk and do NOT give it to your baby. 

Can Sumatriptan cause side effects?

Like all medicines, Sumatriptan can cause side effects, although not everybody will experience them. Some symptoms may be caused by the migraine itself. If you experience any symptoms of allergic reaction, discontinue use immediately and seek medical attention. Signs of allergic reaction include:

  • Rash

  • Hives

  • Wheezing

  • Swollen eyelids, face or lips

  • Complete collapse

Common side effects include:

  • Feeling sick (nausea) or being sick (vomiting)

  • Tiredness or drowsiness

  • Dizziness, feeling weak or getting hot flushes

  • Temporary increase in blood pressure

  • Shortness of breath

  • Aching muscles

Check the patient information leaflet for full list of possible side effects.

Do I need a prescription for Sumatriptan?

You do need a prescription for Sumatriptan in the UK. Our healthcare professionals can provide prescriptions if they think this treatment would be right for you and your condition. When you click the button which reads “Start Consultation” at the top of this page, you’ll see a short questionnaire set up by our healthcare team which is designed to help them understand your medical needs. Just like an in-person consultation with your GP, our doctors will assess your answers to their questions and write a prescription for the treatment they think will be best for you. You’ll then be able to pay for your medication and we’ll send it out to you quickly and in discreet packaging.

Important Information

This product is a medicine; make sure to speak to your doctor or Chemist4U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.

Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here.

If you are concerned about addiction to 'over the counter' medication, we urge you to visit the below links for professional help and advice:

NHS Help & Advice on Drug Addiction

Talk To Frank - Drug Addiction Help & Support

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Shipping Costs

Free UK Delivery on all orders over £30* - Delivery within 3-5 working days.

Standard UK Delivery - £2.95* - Delivery within 3-5 working days.

Express UK Delivery - £4.95** - Delivery within 1-2 working days.

Temperature Controlled Delivery - £8.85 - Delivery within 1-3 working days.

Please Note: These prices are shown as a guide only. All delivery times are approximate but have been obtained in good faith.

*Excluding refrigerated products and treatments which are subject to different postage charges.


Discreet Delivery

All our items are sent completely discreet for your peace of mind.

This means the packaging is plain, there is no mention of what product is inside your package and there is no mention of Chemist4U either.

We respect that many of our products are of a sensitive nature - this is why we take every step to keep your purchases private.

Returns Information

Customers can read our full returns policy by clicking here