Your health information should remain between your provider and yourself. You’ll also need to fill out a medical questionnaire with answers about your medical history, current medications, and lifestyle habits. It’s available in 10 mg and 20 mg tablets. Common side effects include headache, facial flushing, indigestion, and dizziness. This increase in blood flow results in a firmer, longer-lasting erection. It’s available in 50 mg, mg, and mg tablets.1. Check your insurance coverage Since Cialis is available as a generic, many insurance plans now cover it (to varying degrees). Generally, Medicare does not cover Cialis, since it’s not considered medically necessary. How much does tadalafil or cialis cost near you? Find the best tadalafil or cialis prices near you now with our cost comparison tool and start saving today. Tadalafil (Cialis) is taken by mouth either as needed before sexual activity or once daily for erectile dysfunction (ED). It’s also taken once daily to treat symptoms from .