Triamcinolone Acetonide (TA) is a corticosteroid (an anti-inflammatory drug) that is used to treat many eye diseases, such as: macular edema (where inflammation causes thickening of the macula), diabetic eye disease, and age-related macular degeneration. TA has also been shown to be effective in treating neovascular AMD (also known as "wet AMD") where there is an abnormal growth of blood vessels in the macula.