Secure your medications. Consider a lock box for your medications. Even one accidental dose of an opioid pain medicine meant for an adult can cause a fatal overdose in a child or anyone not used to taking this type of medication. Anyone (including teenagers) in the home or friends who are visiting may seek out opioid pain medicines for nonmedical use. This is actually one of the most common sources of opioid supply for abusers. Don’t leave prescription opioids in the medicine cabinet or out in plain view.