Some doctors, particularly private doctors, but also some GP s, will write private prescriptions for Cialis. Timescale and effects of Cialis Cialis 10mg and Cialis 20mg act fast; taking effect within 30 minutes. The manufacturer’s advice is that Cialis tablets are not suitable to be split, and patients should use the minimum effective dose as a whole tablet. As a pharmacy medicine, patients need to have a consultation with a pharmacist in person when buying in store. Preferred by many because of its longer duration, Cialis is regarded as the most cost-effective branded ED medication available in the UK. However, do not take more than one per day. No, the duration of action is longer, 36 hours for Cialis compared with hours for Levitra and 4 hours for Viagra, however most men find that during this active period the treatments are equally effective when equivalent strength tablets are used.16 tablets. £ Erectile dysfunction is when a man is unable to gain or maintain an erection. Find treatments & advice through our safe & discreet online clinic. Cialis Together 10mg Tablets – Tadalafil – 4 Tablets. Write a review. £ 4 UNI | £ per 1UNI. Free next day delivery on selected medicines when you use code .