Viagra vs Levitra

Both Viagra and Levitra are PDE5-inhibiting oral drugs to treat erectile dysfunction, however, they differ in durability, sidebacks and, of course, in popularity among customers. Although both drugs have different terms of action, the mechanism of work and general effect of Viagra and Levitra are the same.

Advantages of Viagra

Patented in Viagra 1993 by Pfizer, Viagra is a worldly recognized medication for male sexual disability treatment. It was the first orally administered ED drug which received FDA approval, in 1998. The development of Viagra, related clinic studies and tests (by now over 23 million of men have tried this drug) laid the foundation of further trials in this area. In other words, numerous research conducted for Viagra contributed to Levitra creation. Nowadays Viagra is more available than Levitra which still should be studied carefully and popularized among the masses.

Another benefit of this medication is its price: usually Viagra pills are cheaper than Levitra.

Advantages of Levitra

Nevertheless, Levitra has its own advantages. Thus, it takes as little as 16 minutes to Levitra to start acting, while with Viagra a patient has to wait from 30 minutes to 1 hour. Moreover, Levitra is more durable than Viagra, up 6 hours to 5 hours respectively. Finally, taking Levitra one has no food or drink limitation, while Viagra can be used only on empty stomach.

Name	Viagra	Levitra
Generic name	Sildenafil Citrate	Vardenafil Hydrochloride
Manufacturer	Pfizer	GlaxoSmithKline and Bayer
FDA approved	March 27, 1998	August 20, 2003
Available dosage	25 mg, 50 mg and 100 mg tablets	2.5 mg, 5 mg, 10 mg and 20 mg tablets
Duration of effects	approximately 4 hours	approximately 5 hours
Maximum doses	100 mg a day	20 mg a day
How to take	Without food	With or without food
When to take	30 to 60 minutes before sexual activity	30 minutes before sexual activity
Side effects	Headache, flushing, indigestion, stuffy or runny nose, upset stomach, diarrhea	Headache, indigestion, back pain, muscle aches, flushing, stuffy or runny nose
Warnings	Do not take with nitrates (Nitro-Dur, others), or if you have certain heart valve problems. Should be used with caution or not used at all with alpha blockers. Should not be used with some antibiotic, antiviral or antifungal medications.	Do not take with nitrates (Nitro-Dur, others) or alpha blockers (Hytrin, Cardura, others), or if you have certain heart valve problems. Should be used with caution or not used at all with alpha blockers. Should not be used with some antibiotic, antiviral or antifungal medications.
Shelf life	2 years	1 year
Special conditions	Sexual stimulation	Sexual stimulation