Sertraline aka Zoloft (Sir Loft) works by increasing the levels of Serotonin a neurotransmitter in the brain. It works better controlling anxiety and panic symptoms however than depression. Side effects are more common than the literature suggests including weight gain, hair loss, decreased libido and xerostomia (whatever the fuck that is). Then there's the Sertraline Discontinuation Syndrome that includes a particularly nasty feature called brain zaps or flips, that feels like an electric shock passing through your brain.
You're still on the Sir Loft aren't you, you got those dead eyes and ashen skin.