How much is my ED medication? Patient Care March 24, 2020 19:24 Updated Rex MD’s ED medications vary in price and dosage. You can see a full breakdown on our Pricing page. We offer discounts when you order 3-month or more supplies. Related articles How fast do ED medications work? How do I cancel or update my subscription? How much is my medication? Why do I see 20mg sildenafil when Viagra is 25, 50 or 100mg? Did I take too much Viagra? Comments 0 comments Please sign in to leave a comment.