Published dose range
The published veterinary reference range for cetirizine in dogs is 0.5-1 mg per kg of body weight, given every 24h. In practice: 10 mg per dog daily (5 mg under 10 lbs).
Source: Veterinary Partner (VIN) →Published range by weight
| Weight | Cetirizine (published range) |
|---|---|
| 5 lb dog | 1.1-2.3 mg |
| 10 lb dog | 2.3-4.5 mg |
| 20 lb dog | 4.5-9.1 mg |
| 30 lb dog | 6.8-14 mg |
| 40 lb dog | 9.1-18 mg |
| 50 lb dog | 11-23 mg |
| 60 lb dog | 14-27 mg |
| 80 lb dog | 18-36 mg |
| 100 lb dog | 23-45 mg |
Computed from the published 0.5-1 mg/kg reference range, every 24h. Product strengths rarely split evenly, so round DOWN to the nearest practical dose and confirm with your vet.
Plain cetirizine ONLY. Zyrtec-D is toxic.
Skip it or ask a vet first if
Zyrtec-D / decongestant versionskidney disease
If you think you overdosed
Call the Pet Poison Helpline: 855-764-7661 or ASPCA Poison Control: 888-426-4435. Both are staffed 24/7 by veterinary toxicologists.