How much Tylenol a day?

The old recommendation was no more than 4000 mg per day for healthy adults (good kidneys and liver). This is 8 extra strength tablets or 12 regular strength tablets per day. The FDA Advisory board has recommended decreasing this, and the FDA will probably do so. Keep in mind that acetaminophen (the active ingredient of Tylenol) can be found in other pain killers and cold and sinus medications. Check for it if you are taking Tylenol with other medications.