Cialis (tadalafil) is used for erectile dysfunction (along with sexual stimulation) and benign prostatic hyperplasia. Common Cialis side effects include headache, stomach upset, back pain, muscle pain, and nasal congestion. Severe side effects may consist of prolonged erections, sudden loss of vision or hearing, and cardiovascular events. Learn about common and serious tadalafil side effects, long-term safety, daily Cialis use, drug interactions, and when to seek medical care. Understanding Tadalafil Side Effects Tadalafil is a widely used medication for erectile dysfunction and certain other conditions, but it’s important to understand its possible side effects before beginning treatment. Tadalafil's most common side effects - headache, flushing, indigestion, back pain, and nasal congesti. Cialis is a prescription drug used to treat erectile dysfunction and benign prostatic hyperplasia. Learn about the drug’s side effects and how to manage them. Find patient medical information for Tadalafil (Cialis, Adcirca, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Cialis (tadalafil) is a prescription medication used to treat erectile dysfunction and symptoms of benign prostatic hyperplasia. Common Cialis side effects include headache, upset stomach, and back pain. Low blood pressure can also happen, especially if you combine Cialis with other substances that lower your blood pressure. Rare, but serious Cialis side effects include vision problems, sudden. Learn about the side effects of tadalafil, from common to rare, for consumers and healthcare professionals. Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. This is high blood pressure that occurs in the main artery that carries blood from the right side of the heart (the ventricle) to the lungs. Cialis (tadalafil) is an erectile dysfunction medicine used to treat impotence (the inability to attain or maintain a penile erection) and benign prostatic hyperplasia (BPH). Common side effects of Cialis include facial flushing, headaches, stomach upset, diarrhea, flu-like symptoms, and nausea. Cialis should be used cautiously in patients with bleeding disorders or active ulcers. Cialis. Tadalafil increases blood flow to particular areas of the body and is used to treat erectile dysfunction. Learn about side effects, interactions and indications.