Yes, dogs can take Loratadine (known as Claritin) to help alleviate allergy symptoms. Loratadine is a second-generation antihistamine less likely to cause drowsiness than first-generation antihistamines like diphenhDiphenhydramineryl). Additionally, give your dog the regular loratadine formulation, not the "D" version (e.g., Claritin-D), which contains pseudoephedrine. Pseudoephedrine can be toxic to dogs, causing severe side effects and death.