Ephedrine is a common central nervous system stimulant present in the herb Ephedra sinica. It is sold in herbal supplements, in diet aids, and as a pure chemical. It is generally found in capsule or tablet form and is usually taken orally. The chart below shows oral dosages for ephedrine in milligrams (mg).

Oral Ephedrine Dosages Threshold 5 - 10 mg Light 10 - 20 mg Common 15 - 30 mg Strong 30 - 50 mg Heavy 50 + mg

Onset : 20 - 90 minutes (depending on form and stomach contents) Duration : 2 - 5 hours Normal After Effects : 2 - 4 hours

There have been deaths associated with higher dose use of Ephedrine. Overdose can lead to dangerously increased pulse rate, blood pressure, and body temperature. Overdoses are treated like those of other stimulant overdoses.