1. something that is to happen or has happened to a particular person or thing; lot or fortune. 2. the predetermined, usu. inevitable, course of events. 3. the power or agency that determines the course of events.
Alternating between ibuprofen and acetaminophen every 2 hours because you have to wait 4 hours for each of them to take a second dose of the same thing. So instead you take a dose of Acetaminophen now, then Ibuprofen in 2 hours and back to Acetaminophen 2 hours later as needed.
Can you safely take 800 mg Ibuprofen every 4 hours? Yes you can take 800mg safely - as long as you aren't taking any  other pain medications. And I believe it should be every 6-8hr for  that amount of ibuprofin.    â¦ You cannot MIX ibuprofin & Tylenol.