Capsules are unit solid dosage forms in which the drug is enclosed within a hard or soft soluble container or shell usually made up of gelatin. The medication incorporated may be a powder in case of hard gelatin capsules and a solid/liquid/semisolid mass in soft gelatin capsules. Capsules are usually intended to be administered orally by swallowing them. Occasionally, capsules may be administered for ophthalmic, rectal, or vaginal use as well.