Are Synthetic Cannabinoids (K2 / Spice) legal in Singapore?

Legal status

Controlled as a class. The First Schedule to the Misuse of Drugs Act 1973 reaches synthetic cannabinoids through generic structural limbs rather than through a single entry. Part 1 carries paragraphs beginning "Any compound structurally derived from indole-3-carboxaldehyde", "indole-3-carboxamide" and "indole-3-carboxylic acid" by substitution with a type A substituent, each followed by dozens of named worked examples, plus separate paragraphs for naphthoylindole, naphthoylpyrrole and tetramethylcyclopropyl structures. Part 4 defines a type A substituent as alkyl, cyanoalkyl, alkenyl, cycloalkylmethyl, cycloalkylethyl and four named heterocyclic groups. The class is controlled. Which limb catches any one named compound is a per compound chemistry question the schedule leaves to analysis.

Consequences if caught

Capital exposure: none. The Second Schedule carries 20 rows imposing death and they name exactly eight terms: opium, morphine, diamorphine, cocaine, cannabis, cannabis mixture, cannabis resin and methamphetamine. No synthetic cannabinoid is among the eight and none of the generic cannabinoid limbs is a capital term, so the capital tier does not reach this class. A herbal smoking blend can separately be a cannabis mixture only if it contains tetrahydrocannabinol and cannabinol in vegetable matter, which a purely synthetic product does not. Supply and trafficking carry imprisonment and caning.

If prescribed or medical

Not established here. Do not rely on a foreign prescription without checking with the Health Sciences Authority before travelling.

Documentation

Verified against the instrument. Read: Misuse of Drugs Act 1973, First Schedule Parts 1 to 4, Second Schedule, Third Schedule and Fifth Schedule, at https://sso.agc.gov.sg/Act/MDA1973, the version the page marks current as at 17 Sep 2026, its most recent amendment being S 321 of 2026 with effect from 1 June 2026. The First Schedule was searched for "type A substituent", "indole-3-carboxylate", "JWH" and "indazole" and returned over 100 matching entries, which is itself the finding that the class is reached generically rather than by name. Settled: the class is controlled, and the Second Schedule does not reach it. Open: which limb catches any one named compound.

Drug laws and enforcement change and vary within a country. This is not legal advice. Always confirm with Singapore’s embassy or official drug authority before traveling; penalties can be severe, including imprisonment.