Fig. 6. Summarized data showing the effects of the intravenous anesthetics on capacitative Ca2+entry in the presence of tyrphostin 23 (Tyr 23). In the presence of Tyr 23, ketamine (100 μm, n = 6), thiopental (100 μm, n = 6), and midazolam (100 μm, n = 6) no longer had an inhibitory effect on capacitative Ca2+entry. However, propofol (100 μm, n = 6) continued to decrease capacitative Ca2+entry after pretreatment with Tyr 23. * P < 0.05 compared with Tyr23 alone .