The only way this movie is intelligent
Let's say the drug doesn't ACTUALLY work as the movie says it does. This would actually explain SO much.
If we presume the drug just gives everyone an ILLUSION they're really intelligent, and perhaps hallucinations, and practically forces the user to make bad decisions..
..but the movie keeps this truth a secret, making the audience believe the drug actually works as it's supposed to, then we can get an actually intelligent movie that pokes fun of the stupidity and gullibility of the audience.
This way, the movie would be really intelligent - actually just showing pathetic drug users that live in delusion + hallucination + are forced to make bad decisions, but the drug users themselves think they're 'enhanced' and more intelligent (and in reality, of course, aren't)..
..wouldn't this make not only more sense, but also make the movie deeper, more profound and intelligent, and actually give a powerful 'don't do drugs'-message?