ABSTRACT
Capsules are the dosage forms in which unit doses, as powder, semisolid, or liquid dosage forms of drugs, are enclosed in a shell. This shell is generally made from gelatin, but can be made from other polymers such as hydroxypropylmethylcellulose (HPMC), polyvinyl alcohol (PVA), seaweed, or starch. Depending on the composition of the gelatin shell, the capsules can be hard or soft gelatin capsules. Soft gelatin capsules (also known as “softgels”) are made from a relatively more –exible, plasticized gelatin lm than hard gelatin capsules.
