This document discusses the extraction, isolation, and estimation of ephedrine from Ephedra plant species. It describes how to extract ephedrine from dried Ephedra stems using solvent extraction. The extracted ephedrine can then be isolated and purified using column chromatography. Estimation of the ephedrine content is done using thin layer chromatography and high performance thin layer chromatography to develop calibration curves. These methods allow for quantitative analysis of ephedrine in samples.