Which dosage form is designed for continuous release of a drug over time?

Which dosage form is designed for continuous release of a drug over time?

• A. Controlled release
• B. Effervescent tablets
• C. Semisolid medications
• D. Topical

Answer: (A)

Controlled release formulations are designed to release a drug gradually over an extended period. By using mechanisms like diffusion through a matrix, erosion of a coating, or osmotic control, they keep drug levels more steady in the body, reduce how often you need to dose, and minimize peaks and troughs that can cause side effects. This ongoing release is what makes them ideal for continuous delivery over time. Effervescent tablets are meant to dissolve quickly in water for rapid onset. Semisolid medications such as ointments and creams are typically for local skin or mucous membrane effects and don’t provide sustained systemic release. Topical products are applied to the skin or mucous membranes and are not inherently designed for continuous systemic release unless a special patch formulation is used.

Controlled release formulations are designed to release a drug gradually over an extended period. By using mechanisms like diffusion through a matrix, erosion of a coating, or osmotic control, they keep drug levels more steady in the body, reduce how often you need to dose, and minimize peaks and troughs that can cause side effects. This ongoing release is what makes them ideal for continuous delivery over time.

Effervescent tablets are meant to dissolve quickly in water for rapid onset. Semisolid medications such as ointments and creams are typically for local skin or mucous membrane effects and don’t provide sustained systemic release. Topical products are applied to the skin or mucous membranes and are not inherently designed for continuous systemic release unless a special patch formulation is used.