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Central Narcotics Bureau (CNB)

Scheduled substances

Learn about scheduled substances regulated under Singapore’s Misuse of Drugs Act, including CNB circulars.

Last updated on 20 November 2025

Circular 1 - dated 26 May 2008

Circular Reference No.: CNB/227A

Circular 2 - dated 01 Apr 2001

Circular Reference No.: CNB/227A

Circular 3 - dated 27 Jun 2014

Circular Reference No.: CNB/227A

Circular 4 - dated 02 Sep 2014

Circular Reference No.: CNB/227A

Circular 5 - dated 05 Nov 2015

Circular Reference No.: CNB/PC CTRL/00014

Circular 6 - dated 04 Oct 2017

Circular Reference No.: CNB/227A

Circular 7 - dated 01 Jun 2022

Circular Reference No.: CNB/227A

Circular 8 - dated 29 May 2024

Circular Reference No.: CNB/227A

Circular 9 - dated 29 November 2024

Circular Reference No.: CNB/227A