Harold R Griffith and Queen Elizabeth
The chemical curare is used as a
muscle relaxant. It is derived from South
American plants such as Chondrodendron
tomentosum. Given intravenously
it causes diplopia and ptosis.
Paralysis of the extraocular muscles also reduces
the intraocular pressure.
Harold R. Griffith was the first anaesthetist to use
curare on patients to reduce spasm
during surgery in his Montreal hospital.