VERY USEFUL. PASS IT TO YOUR FRIENDS.
In India if anytime you are worried if the medicine is not just fake or counterfeit, You can send a 10 digit code as SMS to 9901099010 and you will get a reply back if the drug was authentic.
Whenever a unit of medicine is produced at the factory, it is labeled with a unique code. When you purchase a medicine you can send this code which is at back of the unit to 9901099010 You will receive an SMS which tells if you the medicine is genuine and provides you will batch number, expiration, and other information.