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Taken as snuff, tobacco is generally allowed to be a mild and inoffensive stimulant, which, indeed, in many cases, is prescribed as a most effectual errhine for clearing the nostrils and head.

Euphorbium or cayan pepper mixed with sugar, and used with caution as an errhine.

The dry leaves are powdered and used as an errhine, for the cure of headache.

The powder of the leaves proves an agreeable errhine.

Those of the wild plant are very bitter: dried, they are said to prove a gentle errhine; as also are the flowers.