> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.contro.co.za/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Is Viagra® a PDE5 inhibitor?

Yes, the most commonly-prescribed PDE5 inhibitor is Sildenafil, otherwise known as Viagra.  

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