A controlled-release formulation comprising one or more distinct and discrete units located in physical juxtaposition to enable administration to a patient in need of treatment in a single dose, characterised in that the or each unit comprise(s): (i) a unit dose of an active pharmaceutical ingredient or pharmaceutically acceptable salt thereof； (ii) one or more extended-release agent(s)； and, optionally, (iii) one or more pharmaceutically acceptable excipients, wherein the sum of the unit dose(s) constitutes a pharmaceutically effective amount of the active pharmaceutical ingredient.
