What is the primary use of a lozenge (troche)?

The primary use of a lozenge, also known as a troche, is for local treatment of the mouth and throat. Lozenges are designed to dissolve slowly in the mouth, allowing active ingredients to be released gradually. This localized delivery is particularly effective for soothing sore throats, reducing throat irritation, or delivering anesthetics or antiseptics directly to the affected area.

Using a lozenge ensures that the medication has a direct effect on the mucous membranes in the oral cavity and throat, enhancing the relief of discomfort directly where it is needed. In contrast, systemic treatments do not focus on localized effects, and while some lozenges may have extended-release characteristics, this is not their primary purpose. Additionally, dissolving quickly in water isn't a characteristic of lozenges, which are meant to dissolve in the mouth rather than in a liquid. Thus, lozenges are tailored specifically for their local effect in relieving symptoms related to the mouth and throat.