The specific concern of antihistamine toxicity is not due to their competitive H1-receptor binding and the sedation but due to their anticholinergic effect.
Epub 2008 Apr 11.Carruthers SG, Shoeman DW, Hignite CE, Azarnoff DL.Clin Pharmacol Ther. Healthline Media does not provide medical advice, diagnosis, or treatment. These symptoms don’t usually require medical treatment, and may subside as your body adjusts to the medication. Symptoms of an overdose when taking sedating medication can vary but may include:More serious complications of first-generation antihistamine overdose include seizures and coma. Antihistamines can help relieve nagging symptoms like sneezing, runny nose, sore throat, and watery eyes. There have been reports of death due to antihistamine toxicity. A comparison to atropine poisoning and their similar pharmacologic properties were soon realized. This site needs JavaScript to work properly. COVID-19 is an emerging, rapidly evolving situation. ABOUT. In: StatPearls [Internet]. Most manufacturers of antihistamines advise avoiding their use during pregnancy; however, there is no evidence of teratogenicity with their use, except for hydroxyzine where toxicity has been reported with high doses in animal studies. If you don’t know whether it’s safe to combine an antihistamine with another medication, speak with a doctor or pharmacist.Be mindful that some antihistamines include other ingredients like a decongestant. Antihistamine Toxicity - Emergency Management. All rights reserved. If you take these types of antihistamines, it’s important that you don’t take a separate decongestant.Antihistamines can also relieve allergy symptoms in children, but they aren’t right for all children. Unable to load your collection due to an error However, if a sedating antihistamine is required, chlorphenamine is recommended [Zuberbier, 2014; Powell, 2015]. The difference between a side effect and an overdose is the severity of symptoms. NCBI Bookshelf 1978 Apr;23(4):375-82. doi: 10.1002/cpt1978234375.Basic Clin Pharmacol Toxicol. Follow. The specific concern of antihistamine toxicity is not due to their competitive H1-receptor binding and the sedation but due to their anticholinergic effect.
In: StatPearls [Internet].
2017 Jan;120(1):64-70. doi: 10.1111/bcpt.12632. Antihistamines, or allergy pills, are medications that reduce or block the effects of histamine, a chemical the body produces in response to an allergen.An antihistamine overdose, also called antihistamine poisoning, occurs when there’s too much of the medication in your body. Treatment for antihistamine exposure can range from close monitoring and supportive therapy to rapid pharmacologic treatment.