It may be difficult to remain firm despite wanting to have sex. ED medications can cause side effects, and it’s crucial to have access to a medical provider if needed. It’s best to check your chosen provider’s site for more information. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation. People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. Read our editorial process. · Tadalafil (Cialis) is a medication used to treat erectile dysfunction. It’s also available as Adcirca and Alyq for pulmonary hypertension. Tadalafil sticks around in your body for several days after taking it. This can result in an interaction even if you didn’t take it on the same day as another medication. Tadalafil is the generic name for the brand-name drug Cialis. At the time of publishing, the average cash price of 30, milligram (mg) Cialis tablets is approximately $2,, whereas. Compare prices and print coupons for Cialis (Tadalafil (Cialis)) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $