| impotence drug | 2.63 | Pfizer makes the blockbuster impotence drug Viagra. | ||
| impotence treatment | 1.18 | The potential market for impotence treatments is vast. | ||
| impotence pill | 0.86 | Impotence pills have been sold before, but have been largely ineffective. | ||
| impotence problem | 0.26 | Another promised stuff that it says solves impotence problems. |