Those with pre-existing conditions should always consult a healthcare provider before taking new medications or supplements. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Using the ED medicines we prescribe puts you at greater risk of severe reactions such as extreme dizziness, fainting, heart attack, and stroke. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. These include chest pain and tightness, shortness of breath, extreme lightheadedness, and swelling in the hands and feet. Lemonaid can prescribe sildenafil generic Viagra , tadalafil generic Cialis , and vardenafil generic Levitra.Terms. Viagra and Cialis are the most popular ED (erectile dysfunction) drugs in the world, but they’re not the only ones. They’re equally safe and effective, but they differ a bit in how fast they work, how long they last, and how much they cost. Here’s what you need to know. Prescription needed: yes Dosage: 5 mg Usage: take as needed or daily at a low dosage GET STARTED WITH HIMS MNT ‘s review At Hims, Cialis is available as: Daily tadalafil: or 5 mg daily pill. Generic Viagra (sildenafil): $4 per 25 mg pill, $6 per 50 mg pill, $10 per mg pill; Branded Viagra: $90 per 25 mg, 50 mg, or mg pill; Generic Cialis (tadalafil): $11 per 5 mg pill, $44 per 10 mg or 20 mg pill; Generic Cialis Daily (tadalafil): $8 per mg or 5 mg pill; Branded Cialis: $10 per 5 mg pill, $80 per 10 mg or 20 mg pill.