_Obs._ 1 fl. dr. of either of the above, added to 7 fl. dr. of water, makes a similar (preferable) preparation to the COMPOUND INFUSION OF ORANGE PEEL.--Ph. L.
=Infusion of Parei'ra.= _Syn._ INFUSUM PAREIRae (Ph. E. & D.), I. P. BRAVae, L. _Prep._ 1. (Ph. E.) Velvet leaf or pareira brava root, 6 dr.; boiling water, 1 pint; macerate for 2 hours in a lightly covered vessel, and strain.
2. (Ph. D.) Pareira (bruised and torn), 1/2 oz.; boiling water, 9 fl. oz.; macerate 1 hour, and strain. In irritation and mucous discharges from the urinary organs. The corresponding preparation of the Ph. L. will be found among the DECOCTIONS.
=Infusion of Pars'ley Root.= _Syn._ INFUSUM PETROSELINI, L. From the root of garden parsley. Aromatic, diuretic, and slightly aperient. It has been highly recommended by Dr Chapman and others in dropsy, in the strangury arising from blisters, &c.; taken freely, either alone or combined with a little sweet spirit of nitre.
=Infusion of Peach Leaves.= _Syn._ INFUSUM PERSICae, I. P. FOLII, L.
_Prep._ (Pereira.) Peach leaves (dried), 1/2 oz.; boiling water, 1 pint; macerate an hour, and strain.--_Dose_, 1 to 2 table-spoonfuls, twice or thrice a day; to allay irritation of the bladder and urethra, and as a vermifuge.
=Infusion, Pectoral.= _Syn._ INFUSUM PECTORALE, L. _Prep._ (Hosp. F.) Linseed (bruised), 3/4 oz.; coltsfoot leaves, 1/2 oz.; liquorice root (sliced) and poppy-heads, of each 1/4 oz.; boiling water, 1 pint; digest two hours, and strain. In coughs, colds, hoarseness, &c., accompanied with a dose of aperient medicine. See SPECIES, &c.
=Infusion of Pennyroy'al.= _Syn._ PENNYROYAL TEA; INFUSUM PULEGII, I.
MENTHae PULEGII, L. A popular remedy for nausea, flatulence, colds, hooping-cough, hysterical affections, obstructed menstruation, &c.
=Infusion of Pep'permint.= _Syn._ PEPPERMINT TEA; INFUSUM MENTHae PIPERITae, L. In flatulence, colic, griping, &c., and as a vehicle for other medicines.
=Infusion of Periwin'kle.= _Syn._ INFUSUM VINCae MINORIS, L. From the leaves of lesser periwinkle (_Vinca minor_). Astringent and tonic; in diarrha, dysentery, &c. Mr Weathers employs it in passive haemorrhages, and others have recommended it as an external tonic applied to the perinaeum, &c., in piles, relaxation of the genitals, &c.
=Infusion of Persim'mon.= _Syn._ INFUSUM PERSIMMONIS, L. From the bark of persimmon (_Diospyrus Virginiana_). Astringent; very valuable in diarrha, haemorrhages, agues, &c.; and as a gargle in ulcerated sore throat.
=Infusion of Peru'vian Bark.= See INFUSION OF BARK.
=Infusion of Pink'root.= _Syn._ PINKROOT TEA, WORM T.; INFUSUM SPIGILIae, L. 1. From Indian pinkroot. Vermifuge; either combined with or followed by a purge after the third or fourth dose. The dose for a child 3 to 5 years old is 1 to 2 table-spoonfuls.
2. (Compound; INFUSUM SPIGILIae COMPOSITUM, I. S. CUM SENNa, L.--Ellis.) Pinkroot, 1/2 oz., senna, 2 dr.; fennel seed, 3 dr.; manna, 1 oz.; boiling water, 1 pint.--_Dose_, 1/2 wine-glassful to a child 2 or 3 years old; in worms. See EXTRACT.
=Infusion of Pleu'risy Root.= _Syn._ INFUSUM ASCLEPIADIS TUBEROSae, L. From the root of butterfly weed or pleurisy root (_Asclepias tuberosa_).
Expectorant and diuretic; in large doses, purgative; in colds, pleurisy, pneumonia, &c. According to Bigelow, it is a valuable mild tonic and stimulant.
=Infusion of Pois'on-oak.= _Syn._ INFUSUM RHOIS TOXICODENDRI, L. _Prep._ From the dried leaves of the poison-oak (_Rhus toxicodendron_), 3 dr.; boiling water, 1 pint. Stimulant and narcotic; chiefly in palsy and mania.
=Infusion of Pop'py-heads.= _Syn._ POPPY TEA; INFUSUM PAPAVERIS, L. From poppy-heads (capsules of _Papaver somniferum_). Soothing, anodyne.
Sweetened with honey, it is a popular remedy for tickling cough, restlessness, &c.; also used hot, as an embrocation, in painful tumours, inflammations, &c. See INFUSION OF RED POPPY.
=Infusion of Pur'ging Flax.= _Syn._ INFUSUM LINI CATHARTICI, L. From the dried leaves of purging flax (_Linum catharticum_). Cathartic. The dose should be repeated at intervals of an hour or an hour and a half, until it operates.
=Infusion of Quas'sia.= _Syn._ QUASSIA TEA; INFUSUM QUASSIae (B. P., Ph. L.
E. & D.), L. _Prep._ 1. (B. P.) Quassia, in chips, 60 gr.; cold distilled water, 10 oz.; infuse for half an hour, and strain.--_Dose_, 1 to 2 oz.
2. (Ph. L.) Quassia (sliced), 40 gr.; boiling distilled water, 1 pint; infuse for 2 hours in a covered vessel, and strain.
3. (Ph. E.) Quassia, 1 dr.; boiling water, 1 pint.
4. (Ph. D.) Quassia (rasped), 1 dr.; boiling water, 8-1/2 fl. oz.
5. (Ph. U. S.) Quassia, 2 dr.; cold water, 16 fl. oz.; macerate for 12 hours, and strain. As a bitter tonic, in loss of appetite, dyspepsia, &c.; either combined with alkaline carbonates or chalybeates. Sweetened with moist sugar or honey, it forms a common FLY-WATER or FLY-POISON.
6. (Compound; INFUSUM QUASSIae COMPOSITUM, L.--Ellis.) Quassia, serpentary, and dried orange peel, of each 1/4 oz.; boiling water, 1 pint. A stimulant stomachic.
=Infusion of Red Cab'bage.= _Syn._ INFUSION OF BLUE CABBAGE. Used as a colour, and to make test-paper. It will not keep without the addition of about 1-10th of its weight of rectified spirit.
=Infusion of Red Pop'py.= _Syn._ RED-POPPY TEA; INFUSUM RHADOS, L. From the petals of the red or corn poppy. Anodyne and pectoral. Sweetened with sugar or honey, it is a popular remedy in catarrhal affections: but the use of this, as well as of INFUSION OF POPPY-HEADS, should be accompanied by a dose of aperient medicine.
=Infusion of Rhat'any.= _Syn._ INFUSUM KRAMERIae (B. P.), INFUSUM RHATANIae, I. KRAMERIae (Ph. L. & D.), L. _Prep._ 1. (B. P.) Rhatany, bruised, 1 oz.; boiling distilled water, 20 oz.; infuse 1 hour, and strain.--_Dose_, 1 to 2 oz.
2. (Ph. L.) Rhatany root, 1 oz.; boiling distilled water, 1 pint; macerate for 4 hours in a covered vessel, and strain.
3. (Ph. D.) Rhatany, 1/2 oz.; boiling water, 9 fl. oz.; macerate 1 hour, and strain. Astringent and tonic; chiefly in chronic diarrha.
4. (Concentrated; INFUSUM KRAMERIae CONCENTRATUM, L.) From 8 times the usual quantity of ingredients, as INFUSION OF CASCARILLA.
=Infusion of Rhododen'dron.= _Syn._ INFUSUM RHODODENDRI, L. From the leaves of yellow rhododendron (_Rhododendron chrysanthum_), 1/2 oz.; boiling water, 1/2 pint. Highly recommended by Pallas and Koelpin in gout, chronic rheumatism, and syphilis. It has marked narcotic properties.
=Infusion of Rhubarb=. _Syn._ INFUSUM RHEI (B. P., Ph. L. E. & D.), L.
_Prep._ 1. (B. P.) Rhubarb (in thin slices), 1 oz.; boiling distilled water, 40 oz.; infuse for 1 hour, and strain.--_Dose_, 1 to 2 oz.
2. (Ph. L.) Rhubarb (sliced), 3 dr.; boiling distilled water, 1 pint; macerate for 2 hours in a covered vessel, and strain.
3. (Ph. D.) Rhubarb, 2 dr.; boiling water, 9 fl. oz.; macerate 1 hour.
4. (Ph. E.) Rhubarb (in coarse powder). 1 oz.; boiling water, 18 fl. oz.; infuse for 12 hours, add of spirit of cinnamon, 2 fl. oz,; and strain through linen or calico. Stomachic and purgative; along with neutral salts or aromatics.
_Obs._ The infusion of the Ph. E. being fully double as strong as that of the Ph. L. & D., must be taken in proportionate doses.
5. (Concentrated; Infusum rhei concentratum, L.)--_a._ Rhubarb (in coarse powder), 10 oz.; rectified spirit, 1 pint; cold distilled water, 1 quart; digest 10 days, with frequent agitation, then express the liquor, and filter it; or proceed by the method of displacement.
_b._ Rhubarb, 3 lbs. 5 oz.; cold distilled water, 11 pints; rectified spirit, 5-1/2 pints; as the last.
_Obs._ 1 fl. dr. of either of the above, added to 7 fl. dr. of water, forms 1 fl. oz. of liquid, resembling, and in many points preferable to, the infusion of the Ph. L. The above is the only way a fine, rich-coloured, and transparent concentrated preparation can be made, that will keep well. Should it not prove perfectly limpid, it may be clarified in the way already mentioned.
6. (Alkaline; INFUSUM RHEI ALKALINUM, I. R. CUM POTASSa, L.--Copland.) Rhubarb, 2 dr.; carbonate of potassa, 1 dr.; boiling water, 1/2 pint; macerate for 4 hours, strain, and add of tincture of cinnamon, 1/2 fl. oz.
In dyspepsia, acidity, heartburn, &c.
=Infusion of Ro'ses.= _Syn._ INFUSUM ROSae, L., 1. (Simple.) From the petals of red roses. Used as colouring and for a test; mixed with vinegar and sweetened with honey, it forms a popular gargle in sore throat.
2. (Compound; INFUSUM ROSae--Ph. E. I. ROSae COMPOSITUM--Ph. L., I. R.
ACIDUM--B. P., Ph. D.) _Prep._--_a._ Red rose petals (broken up), 1 oz.; dilute sulphuric acid, 1/2 oz.; boiling distilled water, 40 oz.; infuse for half an hour with the acid and water, and strain.--_Dose_, 1 to 2 oz.
_b._ (Ph. L.) Petals of the red or damask rose (dried and pulled asunder), 3 dr.; boiling water, 1 pint; mix, and add of dilute sulphuric acid, 1-1/2 fl. dr.; macerate for 2 hours, strain off the liquor, and dissolve in it white sugar, 6 dr. The Edinburgh form is nearly similar.
_c._ (Ph. D.) Petals, 2 dr.; boiling water, 1/2 pint; infuse 1 hour, strain, and add of dilute sulphuric acid, 1 fl. dr.
_Obs._ A vessel or glass of stoneware should be used to make the infusion in, as metallic vessels injure the colour of the liquid, and are also attacked by the acid. The best plan is to add the dilute sulphuric acid to the water before pouring it on the leaves. The infusion may be squeezed out of the leaves with the hands.
The COMPOUND INFUSION OF ROSES is principally used as a vehicle for sulphate of quinine, saline purgatives, and some other medicines. It is astringent and refrigerant, and, when diluted with water, forms a pleasant drink in febrile disorders, phthisical sweats, haemorrhages, diarrha, &c.
It also makes a very useful astringent gargle.--_Dose_, 1 to 4 fl. oz.; either alone or diluted with water. It is incompatible with the alkalies and earths, and their carbonates and their bicarbonates.