What should I do for drug allergy-induced urticaria?
May 04, 2022
Source: Cainiu Health
Dr. Liu Wan
Introduction
Drug-induced urticaria (allergic reaction): Immediately discontinue the offending medication and initiate antihistamine therapy. Identify the specific drug causing the allergy and strictly avoid it in the future—this is the cornerstone of effective management. Antihistamines such as propylhexedrine, cimetidine, loratadine, vitamins, and calcium supplements may be used. In some cases, topical corticosteroids—e.g., fluocinonide or betamethasone—may be prescribed under a physician’s supervision.
In daily life, some individuals—due to unique constitutional factors—may develop allergic reactions to certain medications. In some cases, drug allergy manifests as urticaria (hives). So, what should one do if experiencing drug-induced urticaria?
What should one do if experiencing drug-induced urticaria?
For drug-induced urticaria, the first step is to discontinue the offending medication immediately and initiate antihistamine therapy. Identify the specific drug causing the allergy and strictly avoid it in the future—this is a key component of effective management. Commonly used antihistamines include promethazine, cimetidine, loratadine, vitamins (e.g., vitamin C), and calcium supplements. In more severe cases, corticosteroids such as fluocinonide or betamethasone may be prescribed—strictly under physician supervision. Maintain a light, bland diet and avoid known allergenic foods, including seafood, crab, mangoes, and pineapples.
Drug-induced urticaria presents with generalized erythematous macules and wheals accompanied by pruritus, constituting a urticarial-type drug eruption. A clear history of recent medication use is typically present. Once diagnosed, evaluation must extend beyond cutaneous manifestations to assess potential hepatic and renal involvement, as most drugs undergo metabolism and excretion via the liver and kidneys. Therefore, liver function tests (LFTs) and renal function tests (RFTs) are recommended. Management includes strict avoidance of the causative (and cross-reactive) drugs in the future, along with systemic and/or topical antiallergic therapies. All treatment decisions and interventions should be made under the guidance of a qualified clinician.
Be vigilant: If you know you are allergic to a particular medication, make every effort to avoid it, thereby minimizing disruption to your daily life. We hope this information proves helpful!
