BEIJING — Chinese authorities have listed another 32 new psychoactive substances (NPS) as controlled drugs, enlarging the list to 170, according to a statement released on Aug 29 by the office of the National Narcotics Control Commission (NNCC).

NPS are created to exploit loopholes in drug control. Compared with traditional controlled drugs, NPS have similar or stronger effects in terms of causing excitement, hallucinations, or anesthesia among other reactions.

Two new kinds of fentanyl substances were listed.

China has listed 25 fentanyl substances as controlled drugs, which is more than the number listed by the UN, according to the NNCC.

The NNCC said China has been controlling NPS since 2001. Two kinds of raw materials used for producing fentanyl substances were listed under control this February.