In which of the following situations should you call the poison control center?

chest pain or pressure
possible overdose on medication
vomiting of blood
none of the above

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.