Disclosed are sublingual formulations of apomorphine in unit dosage form formulated for sublingual administration, where the unit dosage form is a mucoadhesive film containing a pH neutralizing agent and apomorphine particles containing an acid addition salt of apomorphine, and where the mucoadhesive film is formed by the steps of: (i) combining a film-forming mucoadhesive polymer, apomorphine particles comprising an acid addition salt of apomorphine, and a solvent to form a mixture; and (ii) pouring the mixture onto a surface and evaporating some of the solvent to form a first film comprising the apomorphine particles, where the steps further include contacting or impregnating the first film or mixture with a pH neutralizing agent to produce the mucoadhesive film containing the apomorphine particles and the pH neutralizing agent.