{"id":41,"count":40,"description":"Pfizer's Viagra has been available since 1998. The active ingredient Sildenafil citrate, a PDE5 inhibitor, increases the blood flow to the penis to help men suffering from impotence (erectile dysfunction or ED). The increased blood flow results in an erection. Pfizer's patent for Viagra expired in several European countries (including the UK) on 21 June 2013 allowing legal generic versions of the drug Sildenafil to be made available.","link":"https:\/\/www.doctorfox.co.uk\/news\/erectile-dysfunction\/viagra-online\/","name":"Viagra\/sildenafil","slug":"viagra-online","taxonomy":"category","parent":31,"meta":[],"acf":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Pfizer\u2019s Viagra has been available since 1998. The active ingredient Sildenafil citrate, a PDE5 inhibitor, increases the blood flow to the penis to help men suffering from impotence (erectile dysfunction or ED). The increased blood flow results in an erection. Pfizer\u2019s patent for Viagra expired in several European countries (including the UK) on 21 June 2013 allowing legal generic versions of the drug Sildenafil to be made available.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.doctorfox.co.uk\/news\/erectile-dysfunction\/viagra-online\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.9\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Viagra\/sildenafil news articles - Dr Fox","description":"Pfizer\u2019s Viagra has been available since 1998. The active ingredient Sildenafil citrate, a PDE5 inhibitor, increases the blood flow to the penis to help men suffering from impotence (erectile dysfunction or ED). The increased blood flow results in an erection. Pfizer\u2019s patent for Viagra expired in several European countries (including the UK) on 21 June 2013 allowing legal generic versions of the drug Sildenafil to be made available.","canonical_url":"https:\/\/www.doctorfox.co.uk\/news\/erectile-dysfunction\/viagra-online\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null},"_links":{"self":[{"href":"https:\/\/www.doctorfox.co.uk\/news\/wp-json\/wp\/v2\/categories\/41","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.doctorfox.co.uk\/news\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/www.doctorfox.co.uk\/news\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/www.doctorfox.co.uk\/news\/wp-json\/wp\/v2\/categories\/31"}],"wp:post_type":[{"href":"https:\/\/www.doctorfox.co.uk\/news\/wp-json\/wp\/v2\/posts?categories=41"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}