Zhewitra 40 mg, which contains vardenafil, is used to treat erectile dysfunction. It's important to only stop taking Zhewitra 40 mg under the guidance of a healthcare provider. The decision to stop should depend on your health condition, the effectiveness of the medication, and whether you experience any side effects. If you've achieved the desired results or are no longer in need of the medication, or if you experience adverse reactions, you may consider discontinuing it. However, abruptly stopping or altering the dosage without consulting your doctor can be unsafe. Always follow your healthcare provider's advice to ensure your safety and well-being when stopping any medication.