It is not safe to give Atarax (hydroxyzine) and Dilosyn (methdilazine) together. Both are strong antihistamines, and combining them can cause dangerous drowsiness or breathing issues in an 18-month-old. For your child's safety, please do not give both. The correct dose of either medication must be calculated specifically by a pediatrician based on your child's exact weight, rather than just age. Please consult your doctor to find the safest and most effective treatment for her rash.
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Is it safe to give both Atarax and Dilosyn syrups together to an 18-month-old child for an itchy rash, and what is the correct dose for each?