In clinical trials, some men using Levitra achieved an erection in 16 The recommended dose is 10 mg taken 1 hour before sexual activity. Find patient medical information for Levitra Oral on WebMD including its uses, The dosage is based on your medical condition, response to treatment, and. Vardenafil dose adjustment might be necessary if moderate CYP3A4 inhibitors such as erythromycin and clarithromycin, are given concomitantly (see sections. If you are on one of the lower doses of Levitra and you find the effect too weak, you will most likely be able to take a higher dosage. The maximum recommended dosing frequency is once per day. Skip to Content. Most men can take the standard dosage of 10mg, but patients who suffer from some liver problems or other health problems are prescribed the lower dosages. Use: Erectile dysfunction. Subscribe to our newsletters. Your doctor — or online doctor — will make a dosage recommendation based on your medical history. Levitra - Which dosage is right for me?