About 3.1 million Indians unlawfully use opiate, an opium derivative, out of which half use synthetic opiate, an international report released said on Tuesday.
The International Narcotics Control Board (INCB) annual report says that at $1.4 billion, India is also the biggest consumer market for opiate in South Asia.
Opiates are drugs containing opium or a derivative of opium, either natural or synthetic, and have a sedative effect. Opiates are also called opioids.
INCB is an independent and quasi-judicial organisation which monitors the implementation of the United Nations drug control conventions.