Capsules Flashcards
Solid dosage forms in which medicinal agents and/or inert substances are enclosed in a small shell of gelatin.
Capsule
Advantages of Using Capsule
✓ Conveniently carried as compared with liquid medications. With capsules, there is no need for spoons or other measuring devices which may be inconvenient and may result in less than accurate dosing
✓ Readily identified
✓ Easily taken
✓ Tasteless when swallowed.
Two kinds of capsule shells
Hard Gelatin capsules
Soft Gelatin capsules
Used in most commercial medicated capsules
Hard gelatin capsules
Commonly employed in clinical drug trials to compare the effects of an investigational drug with those of another drug product or placebo.
Hard gelatin capsules
Hard gelatin capsules is consist of 2 sections
Capsule body & shorter cap
Characteristics of Hard gelatin capsule
Clear, colorless and essentially tasteless
HGC may be colored with various FD & C and D&C dyes and made opaque by adding agents such as
Titanium dioxide
Empty capsule shells are made of:
Water
Sugar
Gelatin
Gelatin is obtained by
Partial hydrolysis of collagen obtained from the skin, white connective tissue and bones of animals.
Stable in air when dry but is subject to microbial decomposition when it becomes moist
Gelatin
Normally, hard gelatin capsules contains:
13% to 16% moisture
If stored in an environment of high humidity, additional moisture is absorbed by the capsules and they may be
distorted and lose rigid shape
In an environment of extreme dryness, some moisture normally present in the gelatin capsule is lost, and the capsules may become
Brittle and crumble when handled.
What are the desiccant materials often used?
Silica gel
Activated charcoal, Clay
Is gelatin capsule soluble in cold water and warm water?
In cold only soften while in hot water is rapidly dissolve
Made of gelatin which glycerin or a polyhydric alcohol such as sorbitol has been added.
Soft gelatin capsule
Contain more moisture than hard capsule
Soft gelatin capsule
Soft gelatin capsule, May contain preservatives such as
Methylparaben and Propylparaben
Use of soft gelatin capsule
Used to encapsulate and hermetically seal liquids, suspensions, pasty materials,
dry powders and even deformed tablets
Characteristics of soft gelatin capsules
Oblong, oval or round
Advantages of Soft gelatin capsules are
Pharmaceutically elegant and are easily swallowed
Uses of soft gelatin capsules
For water-immiscible volatile and non-volatile liquids
Water-miscible non-volatile liquids
Water-miscible and relatively non-volatile compounds
Example of water-immiscible volatile and non-volatile liquids
vegetable oils
aromatic oils
aromatic hydrocarbons
aliphatic hydrocarbons
chlorinated hydrocarbons
ethers
esters
alcohols
organic acids