Ilosone is used to treat many different types of infections caused by bacteria.

Inderal is a beta-adrenergic blocking agent. It works by slowing down the heart and reducing blood pressure, which helps it pump more efficiently and reduces the workload on the heart

Imdur is used for preventing angina (chest pain) caused by heart disease.

Imodium is used for treating and controlling diarrhea, including traveler's diarrhea, and reducing the volume of discharge from an ileostomy (a surgical opening in the wall of the intestines).

Imuran is used for preventing kidney transplant rejection along with other medicine. It may also be used to treat signs and symptoms of active rheumatoid arthritis.

Isosorbide Mononitrate is used for preventing angina (chest pain) caused by heart disease.

Indocin is used for treating moderate to severe rheumatoid arthritis, osteoarthritis, and ankylosing spondylitis. It is used to treat gout or certain types of bursitis and tendonitis.