Combined use could lead to additional lowering of blood pressure, possibly to unsafe levels. How will Cialis be supplied? A small number of patients taking Cialis also reported abnormal vision. Do not chew on it or break it apart. Resources and support See the Healthy Male site for more information about erectile dysfunction and its treatment. Prolonged erections can be dangerous. You can use Cialis on a daily basis at a lower dosage.Cialis comes in several different strengths, including: milligrams (mg) 5 mg. 10 mg. 20 mg. The cost for these different strengths depends on whether you have insurance, your individual plan. 20 mg The cost for these different strengths depends on whether you have insurance, your individual plan coverage, and your treatment plan. For example, Cialis for erectile dysfunction (ED) may. Cialis can cost around $ to $ per month out of pocket, depending on the dosage you need. The first generic version of Cialis was released in October , and other manufacturers have released generic versions since then. This has increased market competition, driving prices down.