How long does it take for marijuana to affect the body once inhaled?
The time for psychoactive properties is totally dependant on the route of administration. Like so many other drugs that are smoked, if, once the vaporized or smoke material enters the lungs, in very quickly enters the blood stream-- the pulmonary blood stream-- and is in the brain and is active within minutes, but its effects can last for several hours. If eaten, like at least one FTA approved compound, namely Cannabidiol, then it has be absorbed from the stomach, it has to pass through the liver, where a lot of it is metabolized, and it only reaches the brain after a considerable length of time, usually 30 to 60 minutes. There are now, in development, some extracts that are used as a sublingual, or beneath the tongue spray. It's claimed by the company that's developing it that that reaches the brain within 10 to 20 minutes, however it seems that a lot of it actually ends up being swallowed and absorbed through the gut, so there's a least a sizeable portion of that that has a delayed onset.