Levitra and Cialis work the same way as Viagra, blocking the same enzyme. Though it's unlikely any one works better than Viagra overall, slight chemical differences mean that if one brand doesn't work for a patient, another one might.
Because Viagra is it produced earlier then Levitra or Cialis
You can use Viagra if you have herpes.
i never use Viagra
My boyfriend uses either Viagra or Cialis
can you use viagra if you hve a uretal stent
original Viagra ALWAYS has a "use by date": a date after which the producer (Pfizer) takes it out of use by destroying it. It is not safe for use afterwards.if your viagra has no date on it: don't use it: you risk heart failure.
Yes.
No. Viagra prepares you for sexual activity. Valium puts you to sleep.
ABSOLUTELY NOT!! "poppers" contain nitrates, which have a possibly-fatal interaction with Viagra.
Male potency drug.
yes
It is not good for a 16 year old to use Viagra so you cannot be prescribed.