Explain how the fda regulates otc drugs

Thats a weird question but ill answer it i think 5.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

It's called the nephron.