What does the term vasodilator mean ?
Generic or other Viagra or Cialis (Tadalis) is a vasodilator. Its effect is to relax a sphincter valve that ordinarily prevents blood flow to the penis. This valve has a default setting of “closed” when a man is conscious; arousal (or unconsciouness) basically releases the latch and lets the door swing open. Viagra also triggers the valve to relax, so that an erection is easier to achieve and maintain. It doesn’t have any effect on psychological arousal, except in the sense that a guy generally feels more sexy when he’s sporting a boner than when he’s not. I sometimes get an erection during sleep but loose it when awake. The rule of thumb is that if you get a hardon while you’re asleep, then Viagra can probably enchance your erection while awake. If there is an organic or physiological problem that prevents the relaxation of the muscles involved, then probably Viagra is not going to do much.
