Gamma-GT is a test to measure the amount of the enzyme GGT in the blood. It is used to detect diseases of the liver, bile ducts, and kidney. It is also used to differentiate liver or bile duct disorders from bone disease. It participates in the transfer of amino acids across the cell membrane, and in glutathione (an anti-oxidant) metabolism.

Garamycin ophthalmic ointment is an antibiotic used to treat bacterial infections of the eye. It can treat many types of bacterial infections, particularly gram-negative infection. It works by binding the 30S subunit of the bacterial ribosome, interrupting protein synthesis.