what does marijuana do to jessica?

marijuana makes jessica extremely tired, lethargic, unmotivated and sort of depressed. however, it can make her more talkative in public, as well. that's why jessica only really likes to smoke marijuana at bars, and explicitly seeks to avoid it at home, by herself. 

jessica has never smoked marijuana habitually and never will.

jessica prefers drugs that make her more alert, focused and upbeat - like caffeine or nicotine, although she quit smoking, as a habit, many years ago.