The decision of availability is completely up to the company marketing the product. What important information should you know about Cialis? It can also interact with many medicines, particularly nitrates used in some types of heart disease and blood pressure medicines. The safety and effectiveness of Cialis when used with other treatments for impotence has not been studied. You need a prescription from a doctor to buy tadalafil.Cialis Oral Jelly: Maximum Sexual Performance without Any Tablets. Cialis is an ED medication that has positively impacted the lives of many men by providing stronger and . The drug comes in low-dose versions that can be taken daily. This means you can have sex at any time, rather than needing to take a pill from time to time as needed like other ED brands. The starting dose for daily-use Cialis is milligrams (mg). If that doesn’t work, you can increase your daily dose up to 5 mg. CIALIS for once daily use is a lower dose you take every day. • Do not take CIALIS more than one time each day. • Take one CIALIS tablet every day at about the same time of day. You may attempt sexual activity at any time between doses. • If you miss a dose, you may take it when you remember but do not take more than one dose per day.