> Western Medicines > Sumatriptan


Used for: Acute migraine
Chinese name:

What is Sumatriptan for?

Sumatriptan belongs to a class of medication called triptans. It can constrict some of your brain vessels to relieve the pain of acute migraine in your head and other related-symptoms.

How to use it?

Sumatriptan can be taken orally as tablets. The usual dose is 25-100 mg once, and may repeat a dose after 2 hours if the initial dose was partially effective or headache recurs. The maximum dose per dose is 100 mg, while the maximum dose per 24 hours is 200 mg.

What are the side effects of Sumatriptan?

Common side effects of Sumatriptan include paresthesia, warm or cold sensation, chest pain, chest pressure, vertigo, or fatigue.

Who should not take Sumatriptan?

  • People who are allergic to Sumatriptan or any component of the formulation
  • Patients with ischemic heart disease, ischemic bowel disease, uncontrolled hypertension, certain types of arrhythmias, or peripheral vascular diseases
  • Patients with history of cerebrovascular problems, history of hemiplegic or basilar migraine
  • Concomitant or recent (within 2 weeks) use of an MAO-A inhibitor, such as Moclobemide

Pharmacist Tips:

  • Do not use this medicine for 10 or more days per month because it may become ineffective to treat your headache.
  • This medicine may make you dizzy or drowsy. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
  • Report any symptoms of abnormal heart beat, severe dizziness, or vision changes.

Common dosing schedule:
Sumatriptan should be swallowed whole with water or other liquid as soon as symptoms appear.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Sumatriptan may interact with:

  • Triptans, e.g. Zolmitriptan, Eletriptan
  • Ergot derivatives, e.g. Ergotamine, Nicergoline, Cabergoline
  • Monoamine oxidase-A inhibitor, e.g. Moclobemide

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Sumatriptan in Hong Kong?

In Hong Kong, Sumatriptan is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.


For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Sumatriptan in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Brands in Hong Kong
Available dosage
  • 25mg / 50mg / 100mg (Tablets)
Drug class
Antimigraine Agents
Sub class
Other drugs in same class
Used for: Acute migraine
Chinese name:
Used for: Acute migraine
Chinese name: