From the Guidelines
For an 18-month-old child, it is recommended to avoid using first-generation antihistamines like diphenhydramine due to their potential toxicity and side effects, and instead consider second-generation antihistamines like cetirizine, which have been shown to be well-tolerated and have a good safety profile 1. When considering antihistamines for an 18-month-old child, it's essential to prioritize their safety and well-being.
- The American Academy of Pediatrics and the FDA recommend avoiding the use of over-the-counter cough and cold medications, including antihistamines, in children under 6 years old due to the risk of toxicity and side effects 1.
- Second-generation antihistamines like cetirizine have been shown to be effective and safe for use in young children, with a lower risk of side effects compared to first-generation antihistamines 1.
- If a second-generation antihistamine like cetirizine is prescribed, the typical dosing for an 18-month-old child is 2.5 mg once daily, and it's crucial to use the liquid formulation and measure the dose precisely using the provided measuring device.
- It's also important to note that antihistamines should only be used under the guidance of a pediatrician, and parents should be aware of the potential side effects, such as drowsiness or irritability, and seek medical attention if symptoms worsen or don't improve within a few days.
- In cases of severe allergic reactions, it's essential to seek emergency medical attention immediately rather than relying on over-the-counter antihistamines.
From the Research
Antihistamines for 18-Month-Old Children
- There are no specific studies provided that directly address the use of antihistamines in 18-month-old children.
- However, the studies provided discuss the efficacy and safety of various antihistamines in general, which may be relevant to considering their use in children 2, 3, 4, 5.
- A study from 2007 compared the efficacy and sedative effects of different antihistamines, including diphenhydramine, loratadine, and cetirizine, and found that newer antihistamines have similar efficacy to first-generation antihistamines but with less sedation 2.
- Another study from 1991 compared the efficacy of oral loratadine with nasal steroid spray in seasonal allergic rhinitis and found that both treatments were effective, but with different symptom relief profiles 4.
- A review of topical antihistamines for pruritus relief found mixed evidence, with only topical doxepin supported by large, randomized, double-blind, placebo-controlled trials 5.
- The safety and efficacy of antihistamines in children, particularly those as young as 18 months, would need to be carefully considered, taking into account factors such as dosage, potential side effects, and individual patient needs 2, 3.