Motrin is Ibuprophen, like Tylenol is Acetaminophen. Ibuprophen is great for muscle soreness, and it might help with headache from altitude. Just don't confuse Motrin 800 with regular Motrin. The "800" is 4x regular Motrin or Ibuprophen.

Evelyn, it sounds like you have done plenty of physical preparation. If you can get away a day early, and sleep overnight up at Horseshoe Meadows one night, and the second in the walk-in sites by the Whitney trail head, that will go a really long way toward acclimatization.

Both sites for overnight, you only need a mattress pad and sleeping bag. You don't even need a tent. So setup and breaking camp is quick. The car is always a short walk away.