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According to my doctor, 4 hours. You can switch them up. Take acetaminophen, (Tylenol), then wait 4 hours and take Ibuprofen, wait another 4 hours and take acetaminophen and so on. :) 15 people found this useful.
You can safely take about 1600 mg of ibuprofen a day. That is, 4 tablets of 400 mg ibuprofen a day. For more relief, try this combination: Switch between taking 400 milligrams of ibuprofen (e.g., 2 tablets of Advil), and 1000 milligrams of acetaminophen (e.g., 2 tablets of extra-strength Tylenol) every 8 hours.esolved Question: how much ibuprofen can i take for tooth ache. i got a temporary crown, and. it hurts really bad. now i need a root canal. scheduled for two weeks from now. ibuprofen takes care of the pain but i am taking alot of it. thank you. Submitted: 5 years ago.