A young woman's world unravels when a drug prescribed by her psychiatrist has unexpected side effects.

Dr. Jonathan Banks: Depression is an inability to construct a future.
Emily Taylor: Imagine everything you ever wanted shows up one day and calls itself your life. And then just when you start to believe in it - gone. And suddenly it gets very hard to imagine a future. That's depression, right?
Emily Taylor: What do you doctors call faking? Malingering? Such a funny word. Girls learn to fake things at a very early age - probably around the same time that boys are learning to lie.
Emily Taylor: I read somewhere that there's a difference between tears of joy and tears of rage. Is that true? It's in the chemistry, but you can't tell by looking, they all just look like tears.
[first lines]
Female Guard: Front door!
Prison Desk Guard: I can't let it in unless I see it.
Upset Visitor: I know. I know what the rules are. I'm just asking if you can make an exception.
Prison Desk Guard: There are no exceptions. That's why we have rules.
Dierdre Banks: [about taking beta blocker] Is it bad that I'm doing this?
Dr. Jonathan Banks: Everyone takes them. Lawyers, musicians - people going to interviews for big jobs. It doesn't make you anything you're not. It just makes it easier for you to be who you are.
Dr. Jonathan Banks: Past behaviour is the best predictor of future behaviour.
Emily Taylor: I'm not crazy, you know I'm not crazy.
Martin's Mother: [reading from Emily's letter] "We go to doctors with our sadness and our faith in the hope they will guide us toward health. But instead I have gone down a path toward a misery I never could have imagined. And I have taken my loved ones with me. My only hope is that no one else follows me to this place."
Dr. Jonathan Banks: I'm a psychiatrist, Miss Taylor. Normally, when people hit things with their car, there are skidmarks on the pavement. A brick wall is a pretty good reason to use the brakes, turn the wheel. You didn't do that.
[last lines]
Orderly: How are you doing today, Emily?
Emily Taylor: [gazing out window] Better. Much better.
Dr. Jonathan Banks: [about electroshock] It's in our best interest that you start forgetting.
Dr. Victoria Siebert: Everybody knows everything.
Dr. Jonathan Banks: She's not depressed.
Assistant District Attorney: Yeah. And you didn't catch it and someone died. And I didn't catch it and someone didn't go to jail. We failed.
Dr. Victoria Siebert: She IS cured! You're a fucking genius.
Emily Taylor: I won't be able to tell the truth if I take anymore pills.