Which route uses a patch that continuously releases a controlled quantity of medication through the skin?

Which route uses a patch that continuously releases a controlled quantity of medication through the skin?

• A. Buccal route
• B. Oral route
• C. Inhalation route
• D. Transdermal route

Answer: (D)

Transdermal delivery uses a patch placed on the skin to release a drug steadily into the bloodstream, providing a continuous, controlled amount over time. This approach aims for steady plasma levels and sustained therapeutic effects without the need for oral ingestion or inhalation. It differs from other routes: buccal involves absorption through the cheek mucosa and isn’t delivered by a patch; oral is swallowed and absorbed via the digestive system with potential first-pass metabolism; inhalation delivers medication through the lungs for rapid onset. Patches are ideal for long-acting therapies but require proper skin care and rotating sites to minimize irritation.

Transdermal delivery uses a patch placed on the skin to release a drug steadily into the bloodstream, providing a continuous, controlled amount over time. This approach aims for steady plasma levels and sustained therapeutic effects without the need for oral ingestion or inhalation. It differs from other routes: buccal involves absorption through the cheek mucosa and isn’t delivered by a patch; oral is swallowed and absorbed via the digestive system with potential first-pass metabolism; inhalation delivers medication through the lungs for rapid onset. Patches are ideal for long-acting therapies but require proper skin care and rotating sites to minimize irritation.