E+ | E− | |||||
---|---|---|---|---|---|---|
pEC50 | Emax | pEC50 | Emax | |||
Sildenafil | 8.10 ± 0.04 | 95 ± 1 | 6.44 ± 0.06 | 59 ± 7 | ||
+PTIO | 7.36 ± 0.12* | 55 ± 4* | 6.21 ± 0.14 | 43 ± 8 | ||
Vardenafil | 8.53 ± 0.06 | 100 ± 1 | 6.07 ± 0.07 | 99 ± 3 | ||
+PTIO | 7.21 ± 0.16* | 99 ± 1 | 5.98 ± 0.06 | 95 ± 2 | ||
Tadalafil | 8.01 ± 0.04 | 97 ± 1 | 6.72 ± 0.11 | 48 ± 6 | ||
+PTIO | 7.24 ± 0.12* | 56 ± 5* | 6.60 ± 0.12 | 40 ± 5 |
↵* P < 0.01 compared with the respective control values.