The following chart provides a comprehensive comparison between the three FDA-approved Erectile Dysfunction (ED) drugs: Viagra, Cialis and Levitra. This chart contains important and relevant information that can be used by potential patients to understand the differences between these drugs. You can also access the complete patient information for Viagra, Cialis and Levitra here. Viagra.MD provides this information so visitors to our website can be well-educated about their choices when it comes to ED. Thanks for visiting our website.

	Viagra	Cialis	Levitra
Manufacturer	Pfizer	Eli Lilly	Bayer
Phone Number	1-866-706-2400	1-800-545-5979	1-888-825-5249
Official Website	http://www.viagra.com/	http://www.cialis.com/	http://www.levitra.com/
First Available to Public	March, 1998	November, 2003	August, 2003
Drug (Active Ingredient) Name	Sildenafil	Tadalafil	Vardenafil
Duration of Effectiveness	About 4 hours	Up to 36 hours	About 5 hours
Common Side Effects (these typically subside within a few hours)	Headache, facial flushing, upset stomach	Headache, indigestion, back pain, muscle aches, flushing, stuffy or runny nose	Headache, facial flushing, stuff or runny nose, indigestion, upset stomach, dizziness
Uncommon Side Effects	Although rare, an erection that lasts more than four hours (priapism) requires immediate medical attention; vision changes (seeing a bluish tint); decrease in vision or hearing. Complete Viagra patient information.	Although rare, an erection that lasts more than four hours (priapism) requires immediate medical attention; vision changes (seeing a bluish tint); decrease in vision or hearing. Complete Cialis patient information.	Although rare, an erection that lasts more than four hours (priapism) requires immediate medical attention; vision changes (seeing a bluish tint); decrease in vision or hearing. Complete Levitra patient information.
Available Doses	25 mg, 50 mg, 100 mg	2.5 mg, 5 mg, 10 mg, 20 mg	2.5 mg, 5 mg, 10 mg, 20 mg
Available in Once-a-Day Dose?	No	Yes, in 2.5 mg and 5 mg doses	No
Pill Appearance	Viagra is a blue pill that is diamond-shaped with "pfizer" written on the front. The letters "VGR" appear on the back, immediately followed by the pill's milligrams (25, 50 or 100).	Cialis is an almond-shaped, yellow pill with a cursive "C" and either a "10" or "20" to indicate milligrams, on the front. The back of the pill is blank.	Levitra has a criss-cross "Bayer" insignia on one side of the pill and either a "10" or "20" to indicate milligrams on the other.
Manufacturer Promotions	The Viagra Value Card program (savings on every fourth prescription) was cancelled by Pfizer on Jan. 31, 2009. No current promotions.	The Cialis Promise: Try the Cialis daily-dose regimen for free, and if you decide the 36-hour Cialis would be better for you, you can try that for free as well. Or vice versa.	3-For-Free promotion: Allows you to get 3 free Levitra tablets with a prescription from your doctor.
Can I take the pill during a meal or near the time of a meal?	Yes, but Viagra will not absorb as quickly into the body with high-fat meals such as a cheeseburger and fries	Yes, absorption of Cialis' active ingredient is unaffected by food.	Yes, Levitra may be taken with or without food.
Nickname	"The Little Blue Pill," "Vitamin V"	"The Weekend Pill"	Levitra

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