Contents of four active components in different commercial crude drugs and preparations of danshen (Salvia miltiorrhiza).

Aim: To detect the contents of four active components of Salvia miltiorrhiza in various commercially available danshen crude drugs and preparations.

Methods: Commercially available danshen crude drugs from different sources, as well as danshen pills and intravenous injection preparations containing danshen alone or in combination with other herbs were collected. The composition of these danshen samples was analyzed using HPLC.