Antihistamine (first-generation) · For Dogs · 100 lb
How much Atarax for a 100 lb dog?
A 100 lb dog (45.4 kg) should receive approximately 90.7 mg of Atarax per dose, given every 8-12 hours.
This dosage information is for educational purposes only. Always consult your veterinarian before giving any medication to your pet. Dosages may vary based on your pet's health conditions, other medications, and individual factors.
Content reviewed by licensed veterinarians. Sourced from Plumb's Veterinary Drug Handbook and the Merck Veterinary Manual.
Dosage · 100 lb dog
Atarax dose for a 100 lb dog
Low Dose
45.4
mg
Standard
90.7
mg
Max Safe
90.7
mg
Frequency
every 8-12 hours
Weight in kg
45.4 kg
Always confirm with your veterinarian before administering medication. These calculations are estimates based on published veterinary pharmacology references.
Other Weights
Atarax for a different size dog
FAQ · 100 lb dog
Questions about Atarax for a 100 lb dog
How much Atarax for a 100 lb dog?
What is the safe dose range of Atarax for a 100 lb dog?
How often can I give Atarax to a 100 lb dog?
Need a different weight?
Use the calculator on the main Atarax page for any exact weight, or read the full dosage chart and safety information.
Full Atarax dosage guide →Sources · 09
Sources & references
The dosage information on this page is compiled from the following veterinary and pharmaceutical references:
- Plumb's Veterinary Drug Handbook — the standard veterinary pharmacology reference used by veterinarians worldwide.
- Merck Veterinary Manual — a trusted, peer-reviewed resource for veterinary professionals and pet owners.
- DailyMed (FDA Drug Labels) — official FDA-approved drug labeling and prescribing information for Hydroxyzine.
Read more about our methodology and how we calculate dosages.