Drug delivery agents in the form of dissolvable film that facilitate the delivery of pharmaceutical preparations, nutraceuticals and dietary supplements, for medicinal and dental use; transbuccal patches, trans-mucosal patches, and patches containing pharmaceutical preparations for oral local release of pharmaceuticals, for use in the treatment of dry mouth, mouth ulcers, oral thrush, and mucositis; transbuccal patches, trans-mucosal patches, and oral adhesive patches for oral local release o...