You can safely have caffeine with sumatriptan.
There are no known direct dangerous interactions between caffeine and sumatriptan, so they are safe to have together.
Moderate intake of caffeine, like having a cup of coffee while on sumatriptan can actually often enhance the effectiveness of the sumatriptan and aid in absorption of the sumatriptan to help relieve migraine pain.
Caffeine and sumatriptan has no documented negative interactions and I drink coffee and take sumatriptan as well and it has never been an issue for me.
The caffeine when consumed along with sumatriptan can boost the analgesic effects of the sumatriptan, which helps it work faster.
Although don't rely on the coffee or caffeine too often as too much caffeine intake or withdrawal even can trigger rebound medication overuse headaches.
And if the caffeine is a personal migraine trigger for you, then you should avoid it when taking the sumatriptan.
And don't combine the sumatriptan with ergotamine type medications as they can cause severe side effects.
The drug sumatriptan is also known by it's brand name of Imitrex and is a medication that is available by prescription only that treats acute migraine attacks with or without aura as well as cluster headaches.
The drug sumatriptan belongs to a class of drugs called triptans and works by narrowing the blood vessels in the brain and blocking pain signals.
The sumatriptan drug is an abortive migraine medication that stops a headache that has already started, but sumatriptan will not prevent future migraines from occurring.
The drug sumatriptan is available as oral tablets, as a nasal spray or even as a subcutaneous injection.
The sumatriptan injections and nasal sprays work much faster than the oral tablets and often work within 10 to 30 minutes of using the nasal spray or injection.
The typical starting dose of sumatriptan is 50 mg to 100 mg, but if symptoms return, a second dose of sumatriptan can be taken 2 hours after the first dose, up to a maximum of 200 mg of sumatriptan in a 24 hour period.