Thank you for asking. Regarding buying of medicine whether online or from a retail pharmacist, always make sure that you are receiving invoices for your purchase. Check for the correct brand name, chemical name and expiry date. Consult the doctor who has prescribed you the medication if you are not getting the medicine of the brand which the doctor has written. Do not buy medicine without prescription of the doctor. Use the dosage and frequency only as advised by the doctor. About your question, check the brand name manufacturer and content of the tablet. It should match with  the doctors Prescription.