The present invention provides a kit comprising, in separate compartments of a container, the following components (a) and (b): (a) a combination of apomorphine or a pharmaceutically acceptable acid addition salt thereof and a pharmaceutically acceptable excipient or carrier; and (b) a solution which comprises a diluent and a pH modifying agent; the components being presented such that they can be combined at the point of use into a formulation which is adjusted to a pH ranging from mildly acidic to alkaline and which is suitable for buccal administration. The formulation is useful in treating Parkinson's disease and in promoting sexual function.