Cachets
Cachets Consists of a dry powder enclosed in a shell,
usually prepared from a mixture of rice flour and water by
molding into a suitable shape and drying. They are quite
useful for administering the drugs with unpleasant taste and a
large dose can be enclosed in a cachet than in a tablet or
capsule.
There are two kinds of cachets; 'wet seal' cachets which
are sealed by moistening the edges with water, and dry seal
cachets.
Before administration, a cachet should be immersed in
water for a few seconds, then placed on the tongue and
swallowed with a draught of water. Cachets should be stored
and supplied in well closed air tight containers. Examples are
sodium aminosalicylate cachets, sodium aminosalicylate and
isoniazid cachets.