Which device is used to administer medication by inhalation?

• A. Gtt.
• B. Inhaler
• C. Suspension
• D. Gavage

Answer: (B)

Inhalation delivers medication directly to the lungs using a device that creates a fine aerosol or powder for breathing in. This route targets the airways for rapid local effect and can also provide systemic absorption when needed. The device designed for this purpose is an inhaler, which releases a controlled amount of medication with each use, often with a spacer or propellant to help deliver the dose to the lungs. Other options listed are not devices for inhalation: a drops form is used for administering liquids to the eyes or ears; a suspension refers to a liquid dosage form, not a delivery device; gavage is feeding through a tube into the stomach. So the inhaler is the device used to administer medication by inhalation.