This document summarizes a seminar presentation on mouth dissolving films as an effective oral disintegrating drug delivery system. Key points include: Mouth dissolving films were developed as an alternative to tablets and capsules for patients who have difficulty swallowing. The films are thin, elegant, and rapidly disintegrate in the oral cavity upon contact with saliva. Common methods for preparing mouth dissolving films include solvent casting, semi-solid casting, hot extrusion, and solid dispersion extrusion. Films are evaluated based on parameters like thickness, disintegration time, and drug dissolution. Applications include use for pediatric/geriatric patients, topical drug delivery, and as diagnostic devices or for gastroretentive drug delivery.