Powders Flashcards
The physical form of a material, that is, a dry substance composed of finely divided particles.
Powders
Pharmaceutical preparation, thatis, a medicated powder for internal orexternal use
Powders
Substance is reduced to small particles by rubbing it mortar with a pestle
Trituration or Communication
Substances are reduced and subdivided with additional material(i.e., solvent) that is easily removed after pulverization.
Pulverization by Intervention
Commonly used is small-scale preparation of ointments a suspension to reduce the particle size and grittiness of the indeed powders
Levigation
Communication of Drugs
Trituration or Communication
Pulverization by Intervention
Levigation
Blending Powders
Spatulation Trituration Geometric Dilution Sifting Tumbling
Blending small amounts of powders by the movement of a spatula through them on s sheet of paper or an ointment tile
Spatulation
Employed both to continue and to mix powders
Trituration
Used when potent substances must be mixed with a large amount of diluent
Geometric dilution
Mixed by passing the powders through sifters like those used in the kitchen to sift flour
Sifting
Mixing powders in a rotating chamber
Tumbling
Limited to non-potent substances
Patients should be educated about appropriate storage, measurement, and preparation of bulk powder prescription and non-prescription products in addition to customary counseling at the time of dispensing or purchase.
BULK POWDERS
Dispensed in individual doses usually in folded papers ( I.e.,chartulae). They may also be dispensed in metal foil, small heat-sealed or resealable plastic bags, or other containers
DIVIDED POWDERS
Powders for external use
DUSTING POWDERS
