Upon signing consent, patients will undergo screening procedures to assess eligibility. A diagnosis of schizophrenia or schizophreniform disorder will be determined by the Structured Clinical Interview for DSM IV (SCID) completed by a research clinician using all available clinical data and will be confirmed by consensus diagnosis. A comprehensive medical history and physical exam, including measurement of vital signs, will be performed. A psychiatric history, including diagnosis, treatment history, current medications, and substance use will also be performed. At screening only, a fasting blood sample will be obtained to perform routine laboratory tests including electrolytes, BUN, creatinine, liver function tests, fasting glucose, calcium, phosphate, magnesium, albumin and CBC with differential. Urinalysis will be performed to identify unstable medical illness. A urine toxicology screen will be performed and a urine pregnancy test will be done for women of child bearing potential. A research assistant will complete the demographics and administer the Calgary Depression Scale for Schizophrenia (CDSS), Scale for the Assessment of Negative Symptoms (SANS) and InterSePT Scale for Suicidal Thinking (ISST) to determine whether inclusion criteria are met.