A lozenge is provided that has stable pH and stable levels of active ingredient over time. It comprises a combination of (i) at least one gum and (ii) at least one non-crystallising sugar or non-crystallising sugar alcohol in a matrix designed for controlled buccal delivery of a drug. The lozenge also contains water and optional components selected from flavourings, taste masking agents, colourings, buffer components, pH adjusting agents, excipients, stabilizers and sweeteners. Methods of preparing the lozenge are also provided.
