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.
Strychnina. The alkaloid and its nitrate and sulphate are official. The average dose of each one is 1-64 gr., but may be used, cautiously, up to 1-20 gr. Under twelve years of age from 1-200 to 1-60 gr. It is best given hypo-dermically when used as a stimulant to the respiratory centres and in the embarrassed breathing of pneumonia, as well as in its employment to arrest progressive muscular atrophy. In general, its action is along the lines of nux vomica (q. v.), and is employed in general and local paralyses, in neuralgia, impotence, neurasthenia, deficient peristalsis, and as a cardiac and general tonic. When the effects of minute doses are desired, it is best to use nux vomica or ignatia as a rule. This is especially true of visceral and hysterical troubles. The homeopathic indications for strychnia do not "pan out" in practice, but they employ some unusual and really very useful salts.
The 2x tablet triturates of strychnium phosphoricum are excellent in spinal anemia, and the 3x in the anemia of pregnancy. Strych. arsenicum 3x is used very rationally in chronic diarrhea with paralytic symptoms. The alkaloidalists make most excellent 1-134 gr. granules of this salt. It antagonizes vasomotor paralysis, is a superb tonic, and strengthens the heart nicely in septic and malarial fevers. Strych. et ferri cit., in 2X triturates, are used in chlorotic and paralytic conditions, and in dyspepsia with vomiting. Strych. valerian ate in 2X triturates are used in exhaustion of brain power and with women of high nervous erethism. Of the official preparations, the alkaloid and the sulphate are similarly employed, while the nitrate is preferred in dipsomania.