Medrysone is a synthetic corticosteroid (glucocorticoid) serving as an active pharmaceutical ingredient (API) primarily in ophthalmology. This high-purity powder (≥99%) is used to manufacture topical eye drop formulations for treating inflammatory eye conditions, including allergic conjunctivitis, uveitis, post-operative inflammation, and other irritations. It effectively reduces inflammation, redness, and swelling, alleviating discomfort and promoting healing. Short-term use is recommended to minimize risks such as elevated intraocular pressure or infection. For research, development, or pharmaceutical production under professional supervision.