Patients would be assigned to either sertraline 50 mg daily or identical appearing placebo for 12 weeks. Group allocation would be determined by restricted-randomization technique with variable block length, with the sequence generated by someone not associated with participant assignment. Assignment would be kept in sequentially numbered, opaque, sealed envelopes (SNOSE) in the pharmacy, which would dispense the medication (or placebo). Patients would be given a 30 day supply on the day of discharge, with refills provided by the study coordinator (through the pharmacy)for 12 weeks and a four-day supply of 25 mg Sertraline or placebo at the end of 12 weeks as a taper. Patients would also undergo follow-up blinded structured psychiatric evaluations at 4 weeks, 8 weeks, and 12 weeks to assess for adverse reaction to the assigned treatment agent, and for administration of questionnaires/evaluation to assess for development of depression. Any patient with recognized clinical depression would immediately be removed from further active participation in the study and referred to our Cooper Psychiatry department or outside psychiatrist for ongoing evaluation and treatment. Medication received (Sertraline or Placebo) would necessarily be revealed to Psych only for purposes of guiding appropriate further treatment.