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The pharmacokinetics of cetirizine have been found to increase linearly with dose across a range of 5 to 60 mg. [3] Its C max following a single dose has been found to be 257 ng/mL for 10 mg and 580 ng/mL for 20 mg. [2] Food has no effect on the bioavailability of cetirizine but has been found to delay the T max by 1.7 hours (i.e., to ...
The procedure is to take the child's weight in pounds, divide by 150 lb, and multiply the fractional result by the adult dose to find the equivalent child dosage.For example, if an adult dose of medication calls for 30 mg and the child weighs 30 lb, divide the weight by 150 (30/150) to obtain 1/5 and multiply 1/5 times 30 mg to get 6 mg.
The WHO Model List of Essential Medicines for Children (aka Essential Medicines List for Children [1] or EMLc [1]), published by the World Health Organization (WHO), contains the medications considered to be most effective and safe in children up to twelve years of age to meet the most important needs in a health system.
Levocetirizine is an antihistamine. It acts as an inverse agonist that decreases activity at histamine H1 receptors. This in turn prevents the release of other allergy chemicals and increases the blood supply to the area, providing relief from the typical symptoms of hay fever.
It is a fixed-dose combination drug containing 5 mg cetirizine hydrochloride and 120 mg pseudoephedrine hydrochloride for symptoms related to seasonal allergic rhinitis. [1] [2] [3] Cetirizine/pseudoephedrine gained approval from the U.S. Food and Drug Administration in 2001 as a prescription drug and became over-the-counter (OTC) in 2007. [4]
Dose a Time to peak Half-life b Metabolism Anticholinergic Diphenhydramine: 50 mg 2–3 hours 2–9 hours CYP2D6, others Yes Doxylamine: 25 mg 2–3 hours 10–12 hours CYP2D6, others Yes Hydroxyzine: 25–100 mg 2 hours 20 hours ADH, CYP3A4, others No Doxepin: 3–6 mg 2–3 hours 17 hours c: CYP2D6, others No (at low doses) Mirtazapine: 7.5 ...