The word "astringent" derives from Latin adstringere, meaning "to bind fast".Definition: Astringent is a drug that reacts chemically with cellular proteins producing limited coagulation which is accompanied with shrinkage of body tissues. Astringent protects from external irritation and reduces cellular permeability It also possesses local styptic and local antiseptic actions
What is a lotion ?
It is a biphasic system of immiscible phases stabilized by a surface active agent
What is the difference between creams and lotions?
- If emulsions are liquid, they are called lotions
- Creams are semisolids and do not flow through an orifice freely under gravitational force
- Creams show a thixotropic behavior
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