Taking drug can affect body and mind coordination that can significantly impair the ability to drive a motor vehicle. Road Traffic Ordinance (Cap 374) was amended in 2011 in order to combat drug driving more effectively. It is an offence if anyone:

• drives with any concentration of specified illicit drugs - heroin, cocaine, ketamine (‘k’), methamphetamine (‘ice’), cannabis (‘grass’) and MDMA (‘ecstasy’) present in his blood or urine, whether his driving ability is impaired or not;
• drives under the influence of any  specified illicit drugs to such an extent of being incapable of proper control of the motor vehicle;
• drives under the influence of drugs other than specified illicit drugs to such an extent of being incapable of proper control of the motor vehicle;
• fails to undergo preliminary drug tests without reasonable excuse; or
• fails to provide specimens of blood and/or urine for analysis without reasonable excuse.

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