What is the role of a thickener in a topical base?

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Multiple Choice

What is the role of a thickener in a topical base?

Explanation:
Thickening agents in a topical base are used to modify the product’s flow by increasing its viscosity. A higher viscosity keeps the formulation in place when applied, reduces run-off, and provides a stable, even texture that enhances patient feel and adherence. It can also tailor the release profile and give desirable spreadability, often allowing shear-thinning behavior so the product is easy to spread but stays thicker at rest. This is why the main role is to increase viscosity. It isn’t primarily about making the drug more soluble, and it isn’t a preservative.

Thickening agents in a topical base are used to modify the product’s flow by increasing its viscosity. A higher viscosity keeps the formulation in place when applied, reduces run-off, and provides a stable, even texture that enhances patient feel and adherence. It can also tailor the release profile and give desirable spreadability, often allowing shear-thinning behavior so the product is easy to spread but stays thicker at rest. This is why the main role is to increase viscosity. It isn’t primarily about making the drug more soluble, and it isn’t a preservative.

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