Can you legally buy Cialis online? Yes, it is legal to purchase Cialis online. However, people should only use reputable telehealth companies and online pharmacies.It may be taken with or without food. Tell your doctor right away if you become pregnant. It works to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation. If you are thinking about using tadalafil please discuss it with your doctor. When will Cialis be available to pharmacies? Interactions What drugs and food should I avoid while taking Cialis Tadalafil? Tadalafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow more easily.The normal dosage of Cialis for occasional use in treating ED is 10 mg taken before sexual activity. If you have side effects with the mg dose, your doctor may prescribe a 5-mg dose. If the quality Usually, generic drugs aren’t available until the expiration of the brand name’s patent. Eli Lilly and Company’s patent for Cialis expired in , opening the market to generic. For more information, you can refer to the Cialis prescribing information. If you develop serious side effects while taking Cialis, call your doctor right away. If the side effects seem life.If you are taking tadalafil for erectile dysfunction on a regular schedule, take the missed dose as soon as you remember it. Follow your doctor’s directions carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use the medicine exactly as directed. Follow all directions on your prescription label and read all medication guides or instruction sheets. Tadalafil is sometimes taken as needed, usually at least 30 minutes before sexual activity and not more often than once every 24 hours.