It can also interact with many medicines, particularly nitrates used in some types of heart disease and blood pressure medicines. Because patients with recent heart attacks or stroke, heart pains angina , heart failure, uncontrolled blood pressure or uncontrolled irregular heart beats, severe liver disease, and retinal eye problems were not studied with Cialis, Cialis is not recommended for these patients. The active ingredient can remain longer if you have problems with your kidneys or liver, or you are taking certain other medications. Cialis will be available by prescription only. You need a prescription from a doctor to buy tadalafil. You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription.Tadalafil (Cialis) is available both as brand-name and generic tablets. Common side effects of this medication include headache and indigestion. Tadalafil . 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 HEALTHFNDD, order by 8pm – online only. Helps you get and maintain an erection when you need it. Effective up to 36 hours. Roman sells the following versions of Cialis: Generic: available in tablets of 5, 10, and 20 milligrams (mg), starting from $11 Daily Generic: available in doses of and 5 mg at $8 Branded.