Since<br> 1)any OTC or prescription medication, antiseptic, insect repellant, etc can cause a reaction or side effect, or fail to be effective in SOMEONE <br> 2)and since I would't take anything in the field which I hadn't checked out first<br> 3)I wouldn't pack anything in my first aid kit or PSK which I didn't know to be safe and effective for me. <br> (I once spent 3 days doubled over in the jungle in Costa Rica praying to meet up with the guy who said the OTC diarrhea medication was safe and effective for ANYONE)