The effective dose of Tylenol is 1,000 mg, 4-6 hourly (only 4 doses in 24 hours) to a maximum of 4,000 mg in 24 hours. You need to keep taking it regularly, so you keep up the level in your blood. Make sure that none of your other medications contain Tylenol (Acetaminophen). If they do, factor their amounts into the calculation of your daily dosage.
Motrin is Ibuprofen, which is an NSAID, primarily an anti-inflammatory, not a pain reliever. It is a gastric irritant, so do be careful with it, as your stomach is already a bit irritated. Make sure you take it with food and stop taking it if you have any gastric symptoms.
The maximum total daily dose should not exceed 3,200 mg.
There are several serious consequences associated with taking NSAIDS, so do try not to be on Motrin for long.