Triamcinolone acetonide is an anti-inflammatory steroid that inhibits the IgE-dependent release of histamine. Like other corticosteroids, triamcinolone acetonide suppresses allergic, inflammatory, and immune responses. Intravitreal administration of triamcinolone acetonide is used against diabetic macular edema. MW: 434.5. Purity ≥98% by HPLC