Figure 1 :Raw tracings of electrocardiogram (upper panels) and respiratory movements (lower panels) in two animals that received the aqueous extract of Cleistanthus collinus. A and B are initial and terminal recordings from one animal and C and D are findings from the other. The terminal event in both animals, as seen in B and D, is respiratory arrest accompanied by a sudden drop in heart rate. The same picture was seen in all test animals.