
Keywords: Chitosan (PubChem CID: 71853); Polyvinylpyrrolidone (PubChem CID: 6017); Propranolol hydrochloride (PubChem CID: 62882); Ethylcellulose (PubChem CID: 24832091); Child-appropriate dosage forms; Buccal administration; Mucoadhesion; Bilayered film; Propranol