When considering the use of Himalaya Punarnava tablets at your age, it's important to focus on a few key points:

• Duration of Use: Typically, herbal supplements like Punarnava are used for a few weeks to a few months, but this can vary based on your health condition and response.

• Medical Supervision: It's best to use these tablets under the guidance of a doctor, especially at this stage, to monitor for any side effects or interactions with other medications.

• Purpose and Dosage: The reason for taking Punarnava (e.g., kidney health, inflammation) and the recommended dosage will influence how long you should continue.

• Monitoring: Regular check-ups can help assess effectiveness and safety.

Always inform your doctor about all supplements you take to ensure safe and effective use tailored to your health needs.