Patients using medicinal cannabis should avoid driving or operating machinery. THC (tetrahydrocannabinol), the main psychoactive compound in cannabis, can remain detectable in urine for several days after the last dose.
In some cases, it may take up to five days for 80–90% of the THC to be eliminated from the body. Drug driving is a criminal offence, so patients are strongly advised to discuss the risks and legal implications with their doctor. Patients based in South Australia can find more information via SA health website below.