Contributor: JP Brewer, MD Educational Pearls: Because of their smaller size, there are a variety of adult-dose pills that are potentially toxic to children.  The most common categories of medications that may be toxic include cardiac, diabetic, pain, psychiatric, anti-malarial, and herbals/caustics  Oral hypoglycemics such as sulfonylureas can be particularly dangerous in children.  Opiates and benzodiazepines have the potential for respiratory arrest Anti-malarial medications are arrhythmogenic to children  Camphor, batteries, oil of wintergreen (for the salicylate), and household caustic materials are dangerous non-pharmacologic ingestions to think about in children If you encounter any of the above situations, consult your local poison control center 1-800-222-1222 or your toxicologist if you are lucky enough to have one on call References https://www.acep.org/how-we-serve/sections/toxicology/news/march-2016/one-pill-or-sip-can-kill/ Schillie SF, Shehab N, Thomas KE, Budnitz DS. Medication overdoses leading to emergency department visits among children. Am J Prev Med 2009;37:181-7. Oz B, Levichek Z, Koren G. Medications That Can Be Fatal For a Toddler with One Tablet or Teaspoonful A 2004 Update. Pediatric Drugs, 2004; 6(2): 123-126