what is the difference between pepcid and pepcid ac?
PEPCID® is an H2 blocker. Both Original Strength and Maximum Strength PEPCID AC® begin to work in 15 minutes, and help control acid all day or all night. * Dual Action PEPCID COMPLETE® combines an H2 blocker with an antacid, so it starts neutralizing acid in seconds, but has the long-lasting relief of an H2 blocker.