My 40 y/o son suddenly developed these symptoms: obsessed with dying, insomnia, panic attacks, loss of appetite with resultant 15 lb weight loss, so far. He is miserable, crying, telling people he has colon cancer, then lymphoma. His doctor put him on Lexapro but it takes a while to work. He was admitted through ER to the psych unit. The doctor there sent him home the next day, I'm sure because he didn't seem that severe.