You should avoid or limit the use of alcohol while being treated with vardenafil, and use caution when getting up from a sitting or lying position. It is important to. Drinking alcohol can also potentially increase certain side effects of Levitra. During clinical trials, the use of alcohol and Levitra was evaluated. Find patient medical information for Levitra Oral on WebMD including its uses, side effects Avoid eating grapefruit or drinking grapefruit juice while using this.