S.H.
My daughter is about his age and we have used children's mucinex on her and we just cut down the dosage. We also like to use these Vicks vapor plugins. You plug into an electric outlet and the vapors come out of the little strips, my daughter would always get a rash from the baby vicks and we use these everytime she has a cold. I wouldn't give hem triaminic though, the deongestant is not good for them at such a young age, I don't even take decongestants myself because they make me feel funny.