Neurotherapeutic composition and method therefor

A neurotherapeutic pharmaceutical composition in unit dosage form comprising a neurotherapeutically effective amount of a carboxypeptidase E inhibitor and a pharmaceutically acceptable carrier thereof;

• providing that when the carboxypeptidase E inhibitor is a β-lactam antibiotic, the neurotherapeutically effective amount of the carboxypeptidase E inhibitor is less than an antibiotically effective amount of the carboxypeptidase E inhibitor if such β-lactam antibiotic were to be administered in a unit dosage form by the same route of administration.