best drugstore where you can buy viagra buy viagra without prescription online How often are male factors involved? Go with him to see the doctor. If your partner is agreeable, accompany him when he sees his doctor. This is another way to show that you're concerned and willing to work with him to treat his condition. If safety and dosing studies in rats are successful, human trials of the nanoparticle therapy could begin within a few years, the researchers said. So what should a woman do when her man just can't perform? Experts seem to agree that most important is to remember it's not your problem and you're not the cause. The other half were exposed to 2.7 Gy in 26 sessions spread over just five weeks.