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.
A tablet (pill) of Advil has 200mg of Ibuprofen while that of Aleve has 220mg of Naproxen. The effect of an Advil pill lasts for 4 to 8 hrs while that of Aleve lasts for 8 to 12 hrs. The prescribed dose for Advil is one pill every 4 to 6 hrs and should not exceed 6 in 24 hrs.