Nitrates come as tablets, sublingual under the tongue tablets, sprays, patches, pastes, and ointments. Tadalafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus HIV. 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. If you have an erection that lasts for more than 4 hours, you should go to the nearest hospital emergency department. This leads to more blood flow to the penis, leading to stronger erections.The recommended starting dose for Cialis intended for once daily use is mg, take at the same time each day, without regard to timing of sexual activity. This may be increased to 5mg/day based on need and tolerability. May be taken with or without food. Cialis is available as a generic, under the name tadalafil. 3. Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men. Lemonaid is a San Francisco-based telehealth company that uses a mobile app to help users get access to a range of pharmaceuticals, including Cialis, for an affordable price. To use Lemonaid, you.