Are there any restrictions that I need to follow? Get treatment for alcohol or drug problems. Lose excess pounds. The medicine can help achieve an erection when sexual stimulation occurs. If you are a Mayo Clinic patient, this could include protected health information. What are the alternatives to the primary approach that you’re suggesting? The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom’s position and the change of sildenafil’s piperazine ring methyl group to an ethyl group.In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an test1.ru drug does not protect against sexually transmitted. Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED medications, including Viagra and Cialis.  · Levitra is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Levitra does not cure erectile dysfunction or increase sexual desire. This medicine does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). Warnings.