Some medications come in capsule
form, because the nature of the substance makes it difficult or impossible to
manufacture in a tablet form. Creating a tablet requires finding a binding
material that allows the medication to be formed into a solid shape but that
does not affect its chemical composition nor its bio-availability. For example,
the typical aspirin tablet is held together mostly by corn starch.
Some medications come in capsule
form, because many consumers have a distinct preference for capsules. Many
consumers perceive capsules as easier to swallow. Some consumers perceive
capsules as more effective.
An interesting example of the
preference for capsules is provided by a study ("Effect of Shape of
Medication in Treatment of Anxiety States") published in 1972 in the British
Journal of Psychiatry by psychiatrist M. Z. Hussain, who found that
patients being treated for anxiety responded better to treatment with the same
drug (chlordiazepoxide) in capsule form rather than tablet form. There is no
known medical reason for this, but its psychological significance is
compelling. Capsules have been the required form for most clinical trials of
psychiatric medications since 1972.
Also some reason in capsule form because:-
1. The nature of chemical substance.
2. Rapid bio availability rather than tablet.
3. Easy to swallow for older and child patient.
4. Easy to manufacture where tablet need to more step.
