Papaverine is an opium alkaloid (opiate) used intravenously in the treatment of erectile dysfunction.

GoldBamboo

... PAPAVERINE (PAVABID®, PAVACOT®) is a vasodilator that relaxes blood vessels and makes them wider and allows the blood to pass through them more easily. Generic papaverine extended-release capsules are available. ...
Drug Digest - more...

Papaverine Systematic (IUPAC) name 1-[(3,4-dimethoxyphenyl)methyl ...
Wikipedia - [full article]

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