Obtained from the wood of Cinnamomum Camphora, of China and other Eastern countries.

Camphor is one of the most widely diffused of all vegetable substances. It is found in pennyroyal, hemp-tops, and numbers of other plants.

Physiological Actions

Externally applied, camphor is irritant, stimulating the local circulation. It has feeble antiseptic power, and is sedative to the nerves after first stimulating them. Internally, it acts as a carminative and anti-spasmodic, gives increased force and fulness to the pulse, and stimulates the cerebro-spinal nerves. When large doses (gr. xx.-xxx.) are given, the pulse falls, and a feeling of lassitude and giddiness is produced.

Symptoms Of Poisoning

After poisonous doses (gr. xxx.-lx.), there are faint-ness and headache, vertigo, confused ideas, burning pain in the stomach, delirium, convulsions, and insensibility. The pulse is small, sometimes slow, again accelerated. The skin is pale, cold, and covered with perspiration. No death of an adult has occurred with camphor.

Preparations

Aqua Camphorae. Camphor Water

Eight Gm. in 1000 mils. Average dose, ʒ iiss.-10 mils.

Spiritus Camphorae. Spirit Of Camphor

Strength, 1 to 10. Average dose,  xv.-I mil.

Linimentum Camphorae. Camphor Liniment

Cotton-seed oil, 8 parts; camphor, 2 parts.

Linimentum Saponis. Soap Liniment

Soap, 60 Gm.; camphor, 45 Gm.; alcohol, oil of rosemary, and water to make 1000 mils.

Oleum Camphorae. Oil Of Camphor. Not Official

More stimulating than the other preparations. Average dose,  v.-0.3 mil.x.). (0.3-0.65 Cc.)