(Non-official.)

Origin. - A volatile oil distilled from Ruta graveolens L.

Description and Properties. - A colorless or greenish-yellow liquid with the peculiar odor of the plant, and a pungent, somewhat acrid, bitterish taste. Soluble in an equal weight of alcohol.

Dose. - 2-5 minims (0.13-0.3 Cc).

Physiological Action and Therapeutics. - The action of oil of rue is analogous to that of oil of savine, though less powerful. It is used for the same purposes also, and has occasionally been employed in hysteria.

The oil should be administered in capsules.