Plaster, Mercurial, with Belladon′na. Syn. Emplastrum hydrargyri cum belladonnâ, L. Prep. From mercurial plaster, 6 dr.; extract of belladonna, 2 dr.; olive oil, 1 dr.;mixed by a gentle heat. One of our most useful anodyne and discutient applications, in painful scirrhous, scrofulous, and syphilitic tumours. The Medico-Chirurgical Pharm. orders 1⁄2 fl. dr. of hydrocyanic acid to be added to every 2 oz. of the above.
Plaster of Mezereon and Cantharides. (Ph. G.) Syn. Emplastrum mezerei cantharidatum. Prep. Cantharides in coarse powder, 3 oz., mezereon cut and dried, 1 oz.; acetic ether, 10 oz. by weight. Macerate for 8 days, filter, and dissolve in the filtered liquid 175 gr. of sandarac, 87 gr. of eleme, 87 gr. of resin, which, spread on silk previously covered with the following solution; isinglass, 2 oz.; distilled water, 20 oz.; rectified spirit, 5 oz. by weight.
Plaster of Min′ium. Syn. Emplastrum minii, E. è minio, E. plumbi oxydi rubri, L. Prep. (Ph. L. 1746.) Olive oil, 4 lbs.; minium (red lead), in fine powder, 21⁄2 lbs.; water, q. s.; proceed as for lead plaster (which it closely resembles).
Obs. To ensure a good colour and the quality of keeping well, the quantity of oil should be increased about 1-3rd. When discoloured by heat it forms the ‘brown minium plaster’ (emp. è minio fuscum) of old pharmacy. Lead plaster, either alone or with the addition of a little red lead, is usually sold for it.
Plaster of Minium (Compound). Syn. Nuremberg Plaster; Emplastrum minii compositum, L.; Emplâtre de Nuremberg, Fr. Prep. (Soubeiran.) Red lead, 12 parts; olive oil, 8 parts; grind them together on a porphyry slab, and add the mixture to lead plaster, 50 parts, beeswax, 24 parts, melted together; lastly, when nearly cold, stir in of camphor, 1 part.
Plaster, Morrison’s Adhesive. Syn. Morrison’s adhesive paste. From wheaten flour, 2 oz.; mild ale, 1⁄2 pint; stir them together, and heat the mixture to the boiling point; when cold, add of powdered resin, 3 oz.; and, constantly stirring, again heat them to boiling. Used as a depilatory in ringworm, &c.
Plaster of Mu′cilages. Syn. Diachylon compositum, Emplastrum è mucilaginibus, L. Prep. (Ph. L. 1746.) Beeswax, 20 oz.; oil of mucilages, 4 oz.; melt, and add them to strained ammoniacum, 3 oz.; common turpentine, 1 oz., previously melted together. Stimulant and emollient.
Plaster of Mus′tard. Syn. Emplastrum sinapis, L. This is always an extemporaneous preparation. Flour of mustard is made into a stiff paste with lukewarm water, or with vinegar, and is then spread on a piece of calico or linen (folded two or three times); over the surface of the mustard is placed a piece of gauze or thin muslin, and the plaster is then applied to the part of the body it is intended to medicate. Its action is that of a powerful rubefacient and counter-irritant; but its application should not be continued long, unless in extreme cases. Its effects are often apparently wonderful. We have seen very severe cases of facial neuralgia, sore throat, painful joints, rheumatic pains, &c., relieved in a few minutes by means of a mustard plaster or ‘poultice.’
Plaster, Nuremberg. See Plaster, Minium (Compound).
Plaster of Oak-mistletoe. (Hardy.) Syn. Emplastrum visci quercini. Prep. To 2 parts of melted beeswax add gradually 1 part of juice of true oak mistletoe, and form a plaster. In neuralgic pains.