Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. An erection results from an increase in blood flow to the penis. What alternatives can I use for erectile dysfunction? Will Cialis be prescription or OTC over-the-counter? Patients who have a condition called “left ventricular outlet obstruction” from valvular problems or heart muscle enlargement may get side effects such as fainting or light-headedness. 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 most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire.It lets you have a medical visit and get a prescription online without having to see a provider in person. With telemedicine, an online provider can review your medical .  · But on average, its effects start to lessen 2 to 3 hours after you take a dose. The typical dose for once-daily Cialis for ED is milligrams (mg) to 5 mg. When used as needed for ED, the usual. Three Cialis mg to 5 mg subjects, three Cialis 5 mg subjects and two placebo subjects discontinued study participation due to an adverse event (AE). Nasal congestion was the only AE leading to discontinuation reported by more than one subject (two subjects in the tadalafil to 5 mg group).