Tadalafil is effective for up to 36 hours when sexually aroused, which is much longer than erectile dysfunction treatments containing the active ingredient sildenafil, which is effective for up to four hours when sexually aroused. Take daily tablets to help you get an erection at any time so you can enjoy those spontaneous moments. As a pharmacy medicine, patients need to have a consultation with a pharmacist in person when buying in store. We can also prescribe the non-branded versions of these: Sildenafil brand name Viagra , Tadalafil brand name Cialis and Vardenafil brand name Levitra. How it works Complete online consultation Tell us your health history, select pick up in store or delivery, make payment.4 tablets £ / month 8 tablets £ / month 16 tablets £ / month One time treatment 4 tablets £ 8 tablets £ 16 tablets £ One-time or subscription Sildenafil (generic Viagra) Effective for % of men Works in 1hr and lasts 4 . Cialis (branded Tadalafil) is an erectile dysfunction treatment that lasts up to 36 hours. Learn more about Cialis with our expert consultation service. Choose delivery to your door or click & collect from over convenient local ParcelShops *. We can prescribe all the main brands of medicine for Erectile Dysfunction: Viagra, Cialis, Levitra, Spedra and Vitaros. We can also prescribe the non-branded versions of these: Sildenafil (brand name Viagra), Tadalafil (brand name .