Zhewitra 20 mg only as prescribed by a healthcare professional and to follow the recommended dosage instructions. It's also essential to discuss any medical conditions, medications, or concerns with your healthcare provider before starting treatment with Zhewitra or any other ED medication. They can provide personalized advice and guidance based on your individual health profile. Additionally, Zhewitra 20 mg should not be used by men who are allergic to vardenafil or have severe liver or kidney disease.