Piperazine citrate is an anthelmintic used to treat parasitic worm infections. It is commonly administered orally in the form of an elixir, which is a clear, sweetened hydro-alcoholic solution suitable for consumption. Elixirs are particularly useful for pediatric and geriatric patients who may have difficulty swallowing tablets or capsules. The sweetened flavor of elixirs also helps mask the taste of the medication, making it more palatable. Elixirs are formulated to ensure the active ingredient is evenly distributed throughout the solution, providing consistent dosing with each administration.

**_ Ointments are semi-solid preparations intended for external application to the skin or mucous membranes. Piperazine citrate is not formulated as an ointment because its primary use is for systemic treatment of parasitic infections, which requires oral administration. Injections are sterile solutions or suspensions administered directly into the body through a needle. Piperazine citrate is not typically used in injectable form because it is effective when taken orally, and the oral route is less invasive and more convenient for treating parasitic infections. While a solution is a liquid preparation that can contain the active ingredient dissolved in a suitable solvent, the term "elixir" specifically refers to a type of solution that is sweetened and suitable for oral administration. Therefore, "elixir" is the more precise term for the form in which Piperazine citrate is administered. Among the given options, an elixir is the correct form for administering Piperazine citrate. It ensures ease of administration, especially for children and elderly patients, and provides a consistent and palatable dosage form for treating parasitic infections.