Clarigard 500 Tablet is an antibiotic medicine that can be used to treat many different infections caused by bacteria. These include infections of the respiratory tract, ear, nose, throat, lungs, and skin. It is also effective against a bacteria known as H. pylori, which is associated with peptic ulcer disease. It stops further growth of the bacteria causing the infection and helps treat your infection. Clarigard 500 Tablet is also effective against some infections (e.g., MAC or Mycobacterium avium complex) seen in people with reduced immunity. It stops the bacteria from growing, which helps to resolve your symptoms and cure your infection. This medicine is taken orally, preferably either one hour before or 2 hours after a meal. No antacids should be taken within 2 hours of taking this medicine.