Prednisone and phenobarbital for dogs togetherAnimal Hospital recommends bile acids testing every 6 months for dogs on phenobarbital. . Do not use cymbalta together with thioridazine mellaril , or phenobarbital luminal, solfoton an . . . to test the blood level of phenobarbital. at least one week between prednisone . . Why has my veterinarian prescribed Phenobarbital for my dog? Phenobarbital is used to help . REMEMBER!How do I give Prednisolone to my dog? Give this . RE: Phenobarbital for Dog... more