Sildenafil citrate is the generic name of the chemical compound that had previously been patented by Pfizer, and is marketed as Viagra.
Sildenafil.com was bought by Pfizer. Shortly thereafter, we purchased sildenafil.net and sildenafil.org.
The words are generic... nobody ever complained.
Because the owner of the two domains now approaches old age and has no heir suitable for managing Internet property, the two domain names are now for sale as a package for 5000 US dollars each.
Please contact us under the email address above if you are interested or require more information