they are medications for two different disorders and are often taken together
zoloft is for anxiety/depression; it also helps to calm the nerves and help sleep
ritalin is for add/adhd
"I'm the other daughter...I'm beautifully tragic."
-Elphaba "Thropp" aka The Wicked Witch of the West (from Wicked, the musical, though the book is also excellent, might I add)