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<http://schema.org/mechanismOfAction>
"Vigore 100 Red Tablet is a phosphodiesterase-5 (PDE-5) inhibitor.  It works by relaxing the blood vessels in your penis, thereby increasing blood flow into the penis on sexual stimulation.  This helps you achieve and maintain a hard, erect penis suitable for sexual activity."
<https://www.1mg.com/drugs/vigore-100-red-tablet-32647>