How is the intoxicating substance in hashish broken down by the body?

The main intoxicating substance in hashish, THC, is broken down by the body unevenly and over an indeterminate amount of time. Unlike alcohol, which is eliminated at a steady and predictable rate, THC can remain in your body for much longer and its breakdown rate varies from person to person. Factors such as metabolism, body fat, frequency of use, and overall health can all influence how quickly THC is processed. That’s why it is impossible to say it is eliminated at a fixed rate like “0.1 per mille per hour” or “0.1 gram per hour.” For driving, this means you cannot calculate a safe time after consumption—THC can still impair your ability to drive long after use.