Viagra pills in a blisterpack. Viagra is the trade name for the drug sildenafil citrate. It is used to treat erectile dysfunction. Viagra enhances the smooth muscle relaxant effects of nitric oxide,a chemical that is released in response to sexual stimulation. Relaxation of the smooth muscle allows blood to enter the penis,resulting in an erection. Viagra is made by Pfizer Pharmaceuticals | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Thomas, Mark |
Bildgröße: | 3413 px × 5139 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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