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| | A drug used to treat erectile dysfunction. Viagra relaxes the smooth muscle of the penis to allow increased blood flow and erection. It is a type of phosphodiesterase inhibitor. Also called sildenafil. |
| Previous Definitions: | vertebral column, Vesanoid, vesicle, VHL syndrome, Viadur | | Next Definitions: | vibro-acoustography imaging, Vidaza, video-assisted resection, video-assisted surgery, villous adenoma |
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