Zhewitra 40 Mg, containing the active ingredient vardenafil, belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. It works by relaxing the blood vessels in the penis, increasing blood flow, and helping achieve and maintain an erection in response to sexual stimulation. The typical dosage for Zhewitra is 40 mg, taken about an hour before sexual activity. It is vital for patients to use it as prescribed to avoid potential side effects and maximize its benefits.