Awful watch, won't watch again, and can't recommend.
This was an awful, actively irritating watch, and I like Anna Faris, there was nothing she could have done to save this script. I honestly think she elevated it to the level of crap it is.
I don't even think stoners will like this movie. Not only does involve a misuse (accident, whatever), making her just look like she's stupid, but the movie is one long anti-drug message. People don't enjoy a message shoved in their face, and I'm even anti-drug.
The writing is so poor, and it feels like they would have known what they were doing if someone wasn't jabbing them with a pitchfork as they use "Chekov's gun" they just do it in the most useless way possible. None of the events lend towards any of the following events because she just ends up doing random things because, "ha ha, she's high".
Even the ending is a shoehorned "drugs are bad" cliche, and is severely unsatisfying. I couldn't even enjoy the abuse humor of how debilitated she was, even though I legitimately hated the character), and the sliding scale of ridiculous makes it look like it it was written by SNL interns.
Go watch any "Scary Movie", "Harold and Kumar", "How High", "Dazed and Confused", or any other pot movie before wasting your time on this, but never "Requiem for a Dream" or "Trainspotting", heroin is bad.