Antihistamine (second-generation) · For Dogs · 90 lb
How much Zyrtec for a 90 lb dog?
A 90 lb dog (40.8 kg) should receive approximately 40.8 mg of Zyrtec per dose, given once daily.
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 · 90 lb dog
Zyrtec dose for a 90 lb dog
Low Dose
20.4
mg
Standard
40.8
mg
Max Safe
40.8
mg
Frequency
once daily
Weight in kg
40.8 kg
Always confirm with your veterinarian before administering medication. These calculations are estimates based on published veterinary pharmacology references.
Other Weights
Zyrtec for a different size dog
FAQ · 90 lb dog
Questions about Zyrtec for a 90 lb dog
How much Zyrtec for a 90 lb dog?
What is the safe dose range of Zyrtec for a 90 lb dog?
How often can I give Zyrtec to a 90 lb dog?
Need a different weight?
Use the calculator on the main Zyrtec page for any exact weight, or read the full dosage chart and safety information.
Full Zyrtec 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 Cetirizine.
Read more about our methodology and how we calculate dosages.