What Are the Symptoms of Erectile Dysfunction? If you have an erection that lasts for more than 4 hours, you should go to the nearest hospital emergency department. Will Cialis be prescription or OTC over-the-counter? Because patients with recent heart attacks or stroke, heart pains angina , heart failure, uncontrolled blood pressure or uncontrolled irregular heart beats, severe liver disease, and retinal eye problems were not studied with Cialis, Cialis is not recommended for these patients. The specific process for getting ED pills online depends on your chosen provider. Common side effects may include: headache; flushing warmth, redness, or tingly feeling ; nausea, upset stomach; runny or stuffy nose; or muscle pain, back pain, pain in your arms, legs, or back.About tadalafil Brand names: Cialis, Adcirca. About tadalafil. Tadalafil is a medicine used to treat erection problems (erectile dysfunction) and symptoms of an enlarged prostate (benign prostate enlargement). It’s also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs).  · flushing (warmth, redness, or tingly feeling); nausea, upset stomach; runny or stuffy nose; or. muscle pain, back pain, pain in your arms, legs, or back. This is not a complete list of side. Cialis is a brand-name prescription drug. It’s approved by the Food and Drug Administration (FDA) to treat the conditions below in adult males.* Benign prostatic hyperplasia (BPH). BPH is a condition that happens when the prostate becomes enlarged. (The prostate is a gland found in males. It’s located below the bladder and in front of the.