what dose of claritin should i give my dog
7 Comments. 1  Claritin D can kill a dog because it has the stimulant Pseudoephedrine in it. Every vet Iâve talked to has said regular Claritin is very safe when dosed at no more than 20mg per day. 2  As a physician, I can tell you Claritin (loratadine) is quite safe. Reply. 3  My Lab suffers from seasonal allergies.