Zhewitra 40 mg works by inhibiting the enzyme PDE5, which helps increase blood flow to the penis during sexual stimulation. This improved blood flow can result in the ability to achieve and maintain an erection when sexually aroused. Zhewitra 40 mg containing Vardenafil has been shown to be effective in treating ED in various clinical studies. It is known for its relatively rapid onset of action, with effects typically starting within 25 to 30 minutes after ingestion. Zhewitra 40 mg can be an effective option for treating ED, providing a relatively rapid onset of action and a duration of effectiveness that allows for spontaneous sexual activity. However, it should be used under the guidance of a healthcare provider to ensure safety and optimal results.