When powdered and sprinkled
upon the surface of a blister, it prevents the cantharides acting in a peculiar and painful manner upon the bladder.
Combined with senna
, it increases its purgative properties; and it is also used to correct the nausea produced by squills, and the irritating effects of drastic purgatives and mezereon.
Dose
, from four grains to half a scruple, repeated at short intervals when used in small doses, and long intervals when employed in large doses.
Doses of the various preparations
.—Camphor mixture, from half an ounce to three ounces; compound tincture of camphor (
paregoric elixir
), from fifteen minims to two drachms.