I keep a small supply of Benadryl (pills in sealed foil, for my allergies, runny noses, etc), Tylenol Flu (in sealed foil, for when I'm coming down with something, but away from home), Advil and Tylenol (in a clear pillbox, for headaches, and for friends w/ headaches) in a 5x7 red OR first aid kit. It normally stays in my photo jacket, but it's out of season now and VERY warm here in Socal (mid-high 80's). I leave the FAK in my cargo pants, but I feel it getting a little warm. Will this negatively affect the effectiveness of my carried drugs, because of my body and outside temperature?