What Are H2 Blockers?

• H2 Blockers

H2 blockers are used to treat conditions such as gastric ulcers, peptic ulcers, and erosive esophagitis. This eMedTV segment provides an overview of H2 blockers and their uses, dosing information, possible side effects, and more.

• H2 Blocker Side Effects

Diarrhea and constipation are among the common side effects of H2 blockers. This eMedTV resource provides an overview of H2 blocker side effects, including side effects that you should report to your doctor immediately (such as a fast heart rate).

• H2 Blocker Uses

H2 blockers can be used to treat gastrointestinal conditions such as gastroesophageal reflux disease (GERD). This eMedTV article describes a number of H2 blocker uses, including off-label uses (such as the treatment of H. pylori infections).

• Precautions and Warnings With H2 Blockers

The dose of an H2 blocker must be reduced in people with poor kidney function, including kidney failure. This eMedTV article lists several other precautions and warnings with H2 blockers, including information on who should avoid these drugs entirely.

• H2 Blockers and Pregnancy

H2 blockers are generally considered safe to take during pregnancy. This eMedTV segment offers more information on H2 blockers and pregnancy, including information on why the FDA classifies H2 blockers as pregnancy Category B medications.

• H2 Blockers and Breastfeeding

As this eMedTV page explains, the manufacturers of H2 blockers generally suggest that a nursing woman who has been prescribed an H2 blocker either stop breastfeeding or stop the medicine. This page explores H2 blockers and breastfeeding in detail.