This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Phosphorus. This is a neglected but valuable remedy. Its great affinity for oxygen makes it a little difficult of administration. Its alcoholic solutions should not be dispensed in water, the contained air of which soon reduces it to phosphoric acid, and thus the physicians who administer it in this way fail to get results. The Liquor phosphori, N. F., or "Thompson's Solution," contains 1-24 gr. to a f3, and in doses of 10 to 20 I., diluted as administered, is a satisfactory preparation. The ec. tr. and @ are of about the same order, but are saturated alcoholic solutions, and may be given in doses not exceeding 5 I.. The Pilulce phosphori, U. S. P.. contain 1-100 gr., and they are well constructed chemically and can be depended upon.
In large doses (2 pills; Liq. Phosphori, 20 to 30 drops) phosphorus is seldom demanded. Large doses should be given with great care, but when a powerful general stimulant and nerve tonic are demanded these doses give increased strength. Acute sexual debility may justify large doses. In paralytic conditions due to functional derangements of the cord, in long-standing cases of neuralgia, and in some cases of epilepsy 1-60 gr. doses may be given.
In moderate doses (I pill; Liq., 10 to I5 drops) it is a remedy in nervous exhaustion with the accompanying occipital headache and insomnia. chronic sexual debility, the diseases of senility, glandular diseases marked by debility, and in tubercular states. In small doses (Liquor, I to 3 drops; first decimal dilution, I to 3 drops; and in children and chronic cases, the second dilution). The ec. tr. or any saturated solution in alcohol may be used in glycerine or to saturate sugar disks, but these disks should be kept well corked. Practically, the first dilution, given to the patient with directions to take I to 3 drops in a little water at a dose, serves well. We must give the homeopaths credit for developing a good thing in these indications for phosphorus in small doses, as they are really very effective. In these doses phosphorus overcomes pulmonary engorgement, relieving the cough of tuberculosis and favorably influencing the dyspnea and diarrhea. In pneumonia and bronchitis with engorgement and muco-purulent expectoration and in chronic laryngitis and the sequel of pneumonia it is highly useful.
Fatty degenerations are directly helped by small doses, and especially such changes in the heart, brain, and spinal cord. In cases of malignant jaundice, associated with fatty degeneration of the liver, it sometimes aids in the cure.
A whole class of degenerative nerve changes responds to small doses of phosphorus, such as myelitic paraplegia from excessive venery, asthenic amaurosis following nerve lesions or defects, some cases of dementia and paralysis agitans, and prostration of the ganglionic system with impaired cerebration.
Certain gastro-enteric states marked by debility are aided by small doses. A painful, irritable stomach, associated with deficient pancreatic digestion and painless but debilitating diarrhea, may be helped, and the whole train of symptoms disappear under a nerve-tonic course of phosphorus.