Which route is designed for long-lasting effects due to skin patch delivery?

Which route is designed for long-lasting effects due to skin patch delivery?

• A. Transdermal
• B. Inhalation
• C. Intranasal
• D. Oral administration

Answer: (A)

Transdermal delivery through a skin patch is designed for long-lasting effects because the drug is released slowly through the skin into the bloodstream, producing a steady, controlled plasma level over an extended period. The patch’s reservoir or matrix formulation governs the release rate, so therapeutic levels can be maintained for days with fewer doses. This approach is ideal when continuous effect is needed, as seen with chronic-pain therapies like fentanyl patches or nicotine replacement patches. Inhalation provides rapid onset with shorter duration, intranasal is also quick but limited in duration, and oral administration can be variable due to absorption differences and first-pass metabolism, making it less suited for sustained delivery.

Transdermal delivery through a skin patch is designed for long-lasting effects because the drug is released slowly through the skin into the bloodstream, producing a steady, controlled plasma level over an extended period. The patch’s reservoir or matrix formulation governs the release rate, so therapeutic levels can be maintained for days with fewer doses. This approach is ideal when continuous effect is needed, as seen with chronic-pain therapies like fentanyl patches or nicotine replacement patches. Inhalation provides rapid onset with shorter duration, intranasal is also quick but limited in duration, and oral administration can be variable due to absorption differences and first-pass metabolism, making it less suited for sustained delivery.