Uncoated Tablets
Uncoated tablets include single-layer tablets resulting from a single
comparison of particles and multilayer tablets consisting of concentric or
parallel layers obtained by successive comparison of particles of different
composition.
Coated
Tablets
Coated tablets are covered with one or more layers of mixtures various
substances such as natural or synthetic resins, gums, gelatin, inactive and
insoluble ifilers, sugars, plasticizers, polyols, waxes, coloring matters,
flavoring substances. The substances used as coatings are usually applied as a
solution or suspension in conditions in which evaporation of vehicles occurs.
When the coating is veiy thin polymeric, the tablets are then known as film
coated tablets.
Effervescent Tablets
Effervescent tablets are uncoated tablets generally containing acid
substances and carbonates on hydrogen carbonates which reacts rapidly in the
presence of water to release of C . They are intended to dissolve or to
disperse in water before administration.
Soluble
Tablet
Soluble tablets are uncoated or film coated tablets. They are intended to
be dissolved in water before administration. The solution produced may be
slightly opalescent due to added substances used in the manufacture of the
tablets.
Dispersed
Tablet
These tablets are uncoated or film coated tablets intended to be
dispersed in water before administration giving a homogeneous dispersion.
Gastro
resistant Tablet
These are modified release tablets that are intended to resist the
gastric fluid and to release their active ingredients in the intestinal fluid.
They are prepared by converting tablets with a gastro-resistant coating or from
granule or particles already covered with a gastro-resistant coating.
Modified Release Tablet
These are coated or uncoated tablets containing special procedures which
separately or together are designed to modify the rate or the place at which
the active ingredient are released.
