The typical guidance for sumatriptan dosing is: take the lowest effective dose for an acute migraine, and do not exceed the daily maximum. For most adults using tablets, a common starting dose is 50 mg, with 100 mg permissible if needed, and a second dose can be taken at least 2 hours after the first if relief is not complete. The total dose in 24 hours should not exceed 200 mg for tablets. If using injections or nasal spray, the per-dose amounts and 24-hour limits differ (e.g., injections up to 12 mg per day, nasal spray up to 40 mg per day), but these routes are less commonly used than oral tablets. Avoid using sumatriptan more than 9 days per month to reduce the risk of medication-overuse headache, and consult a clinician if frequent use is required. If you’re asking about a specific formulation (tablet, nasal spray, or injection) or about special populations (pregnant individuals, those with cardiovascular risk, or those taking other migraine preventives), please share that so the guidance can be tailored precisely.