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Anti-Histamine


Anti-Histamine

DRUGDOSE PER DAY mg/kg/day (mg/lb/day)DOSE BY AGE (Years) (in mg per dose)FREQ. OF ADMIN. (Hours)
12+6 – 122 – 6
Diphenhydramine (Benadryl, Benylin)5 (2.3)25 – 5025 – 5012.5 – 256 – 8
Cetirizine (Zyrtec)105 – 102.5 – 524
Hydroxyzine* (Atarax, Vistaril)2 (0.9)25 – 10010 – 255 – 106 – 8
Loratadine (Claritin)1010524

*Hydroxyzine suspension

Weight(lbs)Weight(kgs)2mg/kg/day=Dose for Hydroxyzine (10mg/5mL)
30 to 40 lbs14 to 18kg 32 mg/day 5mL Q 8hrs prn
40 to 50 lbs18 to 23kg40 mg/day5mL Q 6hrs prn
50 to 60 lbs23 to 27kg50 mg/day5mL Q 6hrs prn
60 to 70 lbs27 to 32kg60 mg/day10mL Q 8hrs prn
70 to 80 lbs32 to 36kg(see dose by age above)

SUPPLIED:

DRUGDOSAGE FORMSTRENGTH
Diphenhydramine (Benadryl, Benylin)Elixir, Syrup12.5 mg/5 ml
Hydroxyzine
(Atarax, Vistaril)
Syrup
Suspension
10 mg/5 ml
25 mg/5 ml
Cetirizine
(Zyrtec)
Syrup5 mg/5 ml
Loratadine
(Claritin)
Syrup
Redi-Tab
5mg/5ml
10mg

Disclaimer:All of the information on this website is being presented as helpful reference material but should not be considered authoritative. There are no references because the information has been collected over the years piecemeal from notes, lectures, journals, textbooks, personal communications with other physicians and experience. You may disagree with some of it. Take it simply for what it is: information that I have found useful in my day to day practice as a clinical dermatologist and my hope is that you find it useful as well.