PLASTERS (Emplastra, singular) — the dosage forms for external use having ability to stick to skin. According to GFH, on aggregate state of P. divide on firm and liquid. Firm P. at the room temperature have a dense consistence and are softened at body temperature. Liquid P. represent the volatile liquids leaving on skin a film after evaporation of solvent.
On medical appointment all P. can be divided on epidermatichesky, en-dermatichesky and diadermatichesky. Epidermaticheskiye P. is appointed for the purpose of protection of certain sites of skin from harmful external effects, for closing of defects of skin, rapprochement of edges of wounds, by fixations of bandages. Endermaticheskiye P., the containing medicinal substances of local action, appoint for impact on sore skin. Carry P. with the medicinal substances getting through skin to diadermatichesky; such P. appoint for influence on more deeply - the lying fabrics.
Firm P. classify by structure and a way of preparation. On structure distinguish ordinary and rubber P., an iio to a way of preparation — P. in weight and smeared.
Ordinary P.' basis is the simple lead plaster (Emplastrum Plumbi simplex, a synonym of Emplastrum diachylon simplex) representing lead salt of a complex fat to - the t received by saponification by yellow lead of lard and the sunflower-seed oil taken in equal quantities. By simple lead P.'s alloyage with rosin and terebenthene receive difficult lead P. (Emplastrum^ Plumbi compositum) applied as easy local irritative means. Mercury P. (Emplastrum Hydrargyri) is received alloyage by the concentrated sulfur of mercury ointment (Unguentum Hydrargyri concentra-tum) with simple lead P., refined wool fat and yellow wax. On the basis of simple lead P. also epilinovy Emplastrum Epilini applied to an epilation and the quinacrine P. applied at treatment of a lupus erythematosus are made. All ordinary P. produce in the formed look (sticks or briquettes 2 — 3 g).
Rubber P. (Collemplastra) represent alloys of not vulcanized rubber with pitches, zhiropodobny and some other substances. Treats rubber P. adhesive plaster (see) epidermatichesky appointment and the bactericidal and pepper P., and also a corn adhesive plaster received on its basis Salipod.
Bactericidal P. (Emplastrum adhaesivum bactericidum) consists of the gauze laying impregnated with solution of antiseptic substances (Furacilin, synthomycin and tetraethyl-diamino-triphenyl-carbohydride sulfate), and an adhesive tape on which gauze laying is fixed. Is issued in rectangular pieces of the different sizes.
The pepper plaster and a corn adhesive plaster Salipod receive by inclusion of medicinal substances in adhesive weight; release in rectangular pieces of the established sizes. Pepper P. (Emplastrum Capsici) contains in the adhesive weight of 11% of dense extract of siliculose pepper and 0,3% of dense extract of a belladonna and Tinctura Araliae. A corn adhesive plaster Salipod (Emplastrum adhaesivum ad clavos «Salipodum») contains 32,8% salicylic to - you and 8,1% are gray.
Kollodiyevy and resin-based adhesives carry to liquid P. (a synonym skin glues). Enter into group of kollodiyevy glues: collodion (see); corn liquid (Liquor ad clavos) consisting of a collodion (80%), salicylic to - you and alcohol (on 10%), tetraethyl-diamino-triphenyl-carbohydride sulfate (0,1%); Liquor Novicovi liquid which contains 20 h a collodion of 1 h a tannin and 0,2 h tetraethyl-diamino-triphenyl-carbohydride sulfate, 0,2 h ethyl sleep «a mouth and 0,5 h castor oil. Carry to resin-based adhesives kleol (see), BF-6 glue and nek-ry others glues (see).
Bibliography: I. A. Tekhnologiya's ants of drugs, t. 2, page 529, M., 1980.
I. A. Muravyev.