Vilitra (vardenafil) is available in several strengths such as 10 mg, 20 mg, 40 mg, and 60 mg, and the “most commonly used” dose is generally not 40 mg. In medical practice and typical prescribing patterns for vardenafil (the active ingredient), the 20 mg strength is the most commonly used and most frequently prescribed starting dose for erectile dysfunction, while 10 mg is often used for beginners or sensitive users, and higher doses like 40 mg or 60 mg are usually reserved for people who do not respond adequately to lower doses or under medical guidance. So in simple terms: Most common overall: 20 mg Lower sensitivity / first-time use: 10 mg Stronger / less commonly used: 40 mg Highest / least commonly used: 60 mg  Vilitra 40 mg is not the standard “most used” strength—it’s considered a higher-strength option and should typically only be used if lower doses don’t work well and a doctor approves it. If you want, I can also explain how 20 mg vs 40 mg differs in effects and side effects in real-world use.