That’s not to say there aren’t just as many illegitimate sites. Here are some key factors to consider when deciding: Pricing: Know how much your monthly supply will cost with shipping and tax. Vardenafil also does not have an effect on PDE6, which means that it does not have vision adverse effects. Since vardenafil is used as needed, you are not likely to be on a dosing schedule. Also, look into whether expediting is offered.Hearing loss or ringing in ears. Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded. Low blood pressure—dizziness, feeling faint or lightheaded, . Levitra takes about 30 minutes to start working and the effects last a little longer than Viagra, about 5 hours. Staxyn dissolves in your mouth. It contains the same active ingredient as Levitra. Levitra Prices, Coupons and Patient Assistance Programs. Levitra (vardenafil) is a member of the impotence agents drug class and is commonly used for Erectile Dysfunction. The cost for Levitra oral tablet 20 mg is around $16 for a supply of 2 tablets, depending on the pharmacy you visit.