Can I Give My Dog Claritin?

Yes, with care
Loratadine is commonly referenced for dogs at published doses. The published veterinary reference range for loratadine in dogs is 0.2-0.5 mg per kg of body weight, given every 24h. In practice: 5 mg small dog / 10 mg large dog daily. Plain loratadine ONLY. Claritin-D (pseudoephedrine) is toxic.
Source: Veterinary Partner (VIN)
Get the exact range for your dog's weight

Skip it or ask a vet first if

Claritin-D / any -D decongestant version

The safe habit

Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.