Yes, dogs can have loratadine (Claritin) to treat allergy symptoms, and it is generally well tolerated with few side effects like drowsiness. The typical dosage is about 0.12 to 0.22 mg per pound of body weight, given once or twice a day, but this should always be confirmed and supervised by a veterinarian. Only plain loratadine tablets should be used, avoiding formulations with decongestants (such as Claritin-D) or oral disintegrating tablets that may contain toxic ingredients like xylitol. Loratadine is used for itchy skin, hives, insect bites, seasonal allergies, and mild allergic dermatitis in dogs. Dogs with liver or kidney disease, pregnant or nursing dogs, and those on certain medications should not take loratadine without veterinary advice. Potential side effects, though uncommon, include dry mouth, vomiting, or agitation if overdosed. Always consult a veterinarian before giving loratadine to a dog to ensure safe and appropriate use.