How many days a month can I take sumatriptan or rizatriptan before rebound headaches start?
The ICHD-3 threshold for medication-overuse headache is triptan use on 10 or more days per month for more than 3 months. For simple analgesics such as acetaminophen or NSAIDs, the threshold is 15 or more days per month. Combination analgesics count at 10 days. Counting days matters more than counting tablets. Two doses on one day is still one day. Daily maximums are 200 mg/day for oral sumatriptan and 30 mg/day for rizatriptan. Rizatriptan is limited to 15 mg/day (5 mg per dose) if you also take propranolol. If you are near 8-9 triptan days a month, that is a signal to talk about preventives, not to wait for rebound. Options include riboflavin, topiramate, propranolol, or a CGRP-targeted drug. Log every acute-medication day so the pattern is visible.
ICHD-3 defines triptan-related medication-overuse headache as 10 or more treatment days/month for over 3 months. FDA DailyMed labeling for Maxalt advises a 5 mg dose (max 15 mg/24 h) with propranolol.