Maybe. Under specific circumstances, your vet may prescribe your dog a low dose of Claritin to treat allergies. However, this decision should only be made under your vet’s care and supervision. Do not attempt to give your dog Claritin without your vet’s guidance. Seek emergency veterinary care for acute allergic reactions.
You should always keep medications out of reach of your dog, in sturdy containers. Up to half of pet poisonings are caused by medications meant for people, so you should always exercise caution.