Published on October 18, warning This article is no longer being updated and some information may not be current. Visit the GoodRx Healthhomepage for our latest articles. .How can I buy tadalafil? CIALIS can cause your blood pressure to drop suddenly to an unsafe level if it is taken with any nitrate medication. Some people buy tadalafil online without a prescription. Cialis should not be used by patients taking nitrates such as nitroglycerin tablets or patches because the combination of these with Cialis could significantly lower blood pressure and lead to fainting or even death in some men. Tadalafil works for these conditions by promoting muscle relaxation, which improves blood flow in PAH and urinary flow in BPH.Tadalafil (Cialis) is a phosphodiesterase-5 enzyme (PDE-5) inhibitor. It works by blocking PDE This is a protein in your body that breaks down the molecules that normally cause an erection. When it blocks PDE-5, tadalafil (Cialis) helps an erection occur by allowing certain muscles in the penis to relax and the penis to fill with blood. AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!10K+ visitors in the past monthTop Brands Voted By Men · Over 20 Years Online · Honest & Unbiased Reviews. See tadalafil prices (from $ for 30 tablets Cialis prices mg Cialis oral tablet from $ for 30 tablets 5 mg Cialis oral tablet from $ for 30 tablets 10 mg Cialis .Tadalafil may not be safe for people with certain medical conditions, including people who have had a stroke , have coronary heart disease or retinitis pigmentosa an eye disease. Cialis is a brand-name prescription medication. Tell your healthcare provider that you take Cialis. Cialis is also highly effective in reducing the symptoms of BPH. Dosing Guidelines Typical Cialis dosages will differ depending on the conditions it’s prescribed to treat as well as other factors. Tadalafil stops the breakdown of a chemical responsible for relaxing muscles. There may be rare occurrences of priapism or painful, prolonged erections.