Is it possible to create an antidote to cannabis intoxication, in a similar manner to Narcan (naloxone) for heroin? Does a medication already exist? If so, why isn’t it used?

Hints: Consider how Narcan works (think pharmacology) and what characteristics would be needed for a similar drug targeting the endocannabinoid system.  Cite at least 2 references and limit your response to 750 words.