These sites may send you dangerous counterfeits instead of the meds you need. We also looked at additional services, such as access to digital pharmacies and home delivery options. Finding an online ED provider can feel overwhelming. However, some states require a live video consultation. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects. That’s not to say there aren’t just as many illegitimate sites.You can buy it under its generic name or under the brand names Levitra and Staxyn. Vardenafil is FDA approved to treat erectile dysfunction (ED). It works by allowing more blood to flow to your. Levitra 20 mg tablet. Medication name. Uses How to use Side effects Precautions Drug interactions Overdose Notes Missed dose Storage Important note. Information last revised August  · Levitra works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. 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.