Papaverine, a vasodilator, is used orally for to relieve restrictions in blood flow associated with spasms of the arteries and irregular heart rhythms. It is used for various vascular spasms associated with muscle spasms and is being tested to treat impotence.
Advice & Tips:
It took a while to get comfortable with the idea of sticking a needle *there*, but I much prefer this to pills. I found the pills (yes, all of them) cost too much (not covered by my insurance), were not always effective, and left me with a terrible headache the next day.