Anti-Histamine
| DRUG | DOSE PER DAY mg/kg/day (mg/lb/day) | DOSE BY AGE (Years) (in mg per dose) | FREQ. OF ADMIN. (Hours) | ||
|---|---|---|---|---|---|
| 12+ | 6 – 12 | 2 – 6 | |||
| Diphenhydramine (Benadryl, Benylin) | 5 (2.3) | 25 – 50 | 25 – 50 | 12.5 – 25 | 6 – 8 |
| Cetirizine (Zyrtec) | – | 10 | 5 – 10 | 2.5 – 5 | 24 |
| Hydroxyzine* (Atarax, Vistaril) | 2 (0.9) | 25 – 100 | 10 – 25 | 5 – 10 | 6 – 8 |
| Loratadine (Claritin) | – | 10 | 10 | 5 | 24 |
*Hydroxyzine suspension
| Weight(lbs) | Weight(kgs) | 2mg/kg/day= | Dose for Hydroxyzine (10mg/5mL) |
|---|---|---|---|
| 30 to 40 lbs | 14 to 18kg | 32 mg/day | 5mL Q 8hrs prn |
| 40 to 50 lbs | 18 to 23kg | 40 mg/day | 5mL Q 6hrs prn |
| 50 to 60 lbs | 23 to 27kg | 50 mg/day | 5mL Q 6hrs prn |
| 60 to 70 lbs | 27 to 32kg | 60 mg/day | 10mL Q 8hrs prn |
| 70 to 80 lbs | 32 to 36kg | (see dose by age above) |
SUPPLIED:
| DRUG | DOSAGE FORM | STRENGTH |
|---|---|---|
| Diphenhydramine (Benadryl, Benylin) | Elixir, Syrup | 12.5 mg/5 ml |
| Hydroxyzine (Atarax, Vistaril) |
Syrup Suspension |
10 mg/5 ml 25 mg/5 ml |
| Cetirizine (Zyrtec) |
Syrup | 5 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.