Pastes

• Pastes are semisolid preparations of stiff consistency and contain a high percentage (20%–50%) of finely dispersed solids.

• Pastes are intended for application to the skin, oral cavity, or mucous membranes.

• Pastes ordinarily do not flow at body temperature and thus can serve as occlusive, protective coatings.

• As a consequence, pastes are more often used for protective action than ointments.

• Fatty pastes that have a high proportion of hydrophilic solids appear less greasy and are more absorptive than ointments.

• They are used to absorb serous secretions and are often preferred for acute lesions that have a tendency toward crusting, vesiculation, or oozing.

• Dental pastes are applied to the teeth.

• Other orally administered pastes may be indicated for adhesion to the mucous membrane for a local effect.

• Although rare, pastes can be administered orally, for example to evaluate pharyngeal function.

• In veterinary medicine, pastes are typically administered orally and are intended for systemic delivery of drug substances.

• The paste is squeezed into the mouth of the animal, generally at the back of the tongue, or is spread inside the mouth.

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