Clarke gives the toxic effects of homeopathy drug Cannabis Indica and its therapeutic uses in non-toxic doses in his book The ABC Manual of Materia Medica and Therapeutics, published in 1901….

      Indian Hemp.


      Distressing hallucinations of sight and hearing with mental weakness, stupidity and prostration of body and mind. Insanity or delirium tremens with frightful hallucinations. Locomotor ataxia with muscular weakness and anaesthesia of the skin and muscular sense. Paralysis agitans. Senile trembling.


      Pale, clammy skin, face bloated, eyes congested, pupils dilated. Periods of loss of consciousness, stupor, mental operations very weak. Frightful hallucinations. Headache, giddiness, vomiting.1. Great muscular weakness with trembling of the arms and legs. Cataleptic condition. Spasms. Anaesthesia of the skin and of the muscular sense so great that when standing there may be no consciousness of touching the ground. Pulse small and feeble.2. Impotence.3.


      Extractum cannabis Indicae, 1/5-I gr.

Tinctura cannabis Indicae, 2-20 m.

The tinctura upon sugar or bread crumbs is preferred. Commence invariably with the minimum dose.


      Delirium tremens with horrid hallucinations of sight and hearing.1-2.

Insanity. Distressing hallucinations. Prostration of body and mind. 1-2.

Delirium, spectra and sleeplessness after exhausting illness. 1-2.

Softening of the brain.1-2.

General paralysis with restlessness at night.1-2.

Pachy meningitis. 1-2.

Migraine. Nausea, vomiting, spectra. 1. (To be steadily given in the intervals, in doses of one-third grain twice per day).

Obstinate nervous vomiting.1.

Locomotor ataxia.2.

Chronic spasms.2.

Chloral habit.1-2.

Morphine habit.1-2.

Senile trembling.2.

Paralysis agitans.


George Hardy Clark
Clark, George H. (George Hardy) 1860-1941 was the author of: Homeopathic Treatment of Asthenopia; Lee and Clark's Cough and expectoration : a repertorial index of their symptoms; The A B C Manual of Materia Medica and Therapeutics; A system for the care and training of children; The Black Plague and Its Control.