Attar of Nishapur in Persia, much of medicine and drugs were based on herbs. Therefore, by profession he was similar to a modern-day town doctor and pharmacist. Rose oil means attar. Several musical artists have albums or songs which share the name of his most famous work, "Conference of the Birds", as well as the themes of enlightenment contained therein. Notably, jazz bassist David Holland's album, which was written as a metaphor for his own enlightenment, and Om's Conference of the Birds, which deals with extremely esoteric themes often connected with metaphors of flight, inward vision, destruction of self, and oneness with the
Essential oil may contain impurities and additives that may be harmful to pregnant women. Sensitivity to certain smells may cause pregnant women to have adverse side effects with essential oil use, such as headache, vertigo, and nausea. Pregnant women often report an abnormal sensitivity to smells and taste, and essential oils can cause irritation and nausea when ingested. Always consult a doctor before use. The following table lists the or median lethal dose for common oils; this is the dose required to kill half the members of a tested animal population. LD is intended as a guideline only, and reported values can