Understand the current trends in substance use (alcohol, marijuana, cocaine, prescription drugs and others).? Signs that your adolescent may be using substances. Prevent, recognize and respond to an opioid overdose. ? Understand how to administer Narcan in an opioid overdose situation.? Identify resources for parents and professionals dealing with people with Substance Use Disorder. Wednesday, February 10, 2016 at 7:00pm at the Chelmsford Public Library, 25 Boston Road, Chelmsford Center. Chelmsford Board of Health 978-250-5241