Deworming products can be administered in which of the following NOT methods?

• A. Bolus
• B. Pour-on
• C. Drench
• D. Inhalation

Answer: (D)

Deworming medicines are given by routes that deliver the drug to where gut parasites live. A bolus is a solid pill swallowed and stays in the stomach or rumen, releasing the medicine over time. Pour-on products are applied along the animal’s back and absorbed through the skin, providing systemic action. Drenching involves giving a liquid dose into the mouth so the animal swallows it, coating the gut with the medicine. Inhalation isn’t used because dewormers aren’t formulated as vapors or aerosols for respiratory delivery; dosing would be unreliable and unsafe, and the lungs aren’t the target site for most intestinal worms. So the method not used is inhalation.