Product Description: Sumarex™ is used to treat migraine headache. Sumarex containssumatriptan, whichbelongs to a group of medicines called triptans (also known as 5-HT1 receptor agonists). How to use: Always take this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure. When to take Sumarex™ It’s best to take Sumarex™ as soon as you feel a migraine coming on, although you can take it at any time during an attack. If your symptoms start to come back: You can take a second Sumarex™ tablet if at least 2 hours have passed since the first tablet. Don’t take more than 300 mg in total in 24 hours. Don’t use Sumarex™ to try to prevent an attack - only use it after your migraine symptoms start. Ingredients: Each Sumarex™ film-coated tablet contains a single dose of sumatriptan, which belongs to a group of medicines called triptans (also known as 5-HT1 receptor agonists).