Pharmacokinetic Herb-Drug Interaction between Hibiscus sabdariffa Calyces Aqueous Extract and Captopril in Rats

Figure 1

Chromatographic profile of Hibiscus sabdariffa L aqueous extract using the gradient programs described in methods. (a) UV chromatogram at 360 nm using gradient program 1. (b) UV chromatogram at 520 nm using gradient program 2.

(a)

(b)