M.P.
I have actually read that Vicks can be more harmful than helpful for young children/infants.
How long has he been sick?
Coughs and respiratory illnesses are tricky with infants. I would have him seen by a dr.
I agree - Tylenol is not going to help with cough/congestion. Tylenol is for pain/fever. If your child has a fever, and has for more than 24 hours, I would definitely all a doctor.
In addition, colds and other illnesses sometimes just take TIME to get better! There isn't always a magic cure and it is hard, as a parent, watching your child be sick or uncomfortable, but there is nothing you can do but push fluids and give extra hugs and cuddles! :-)
Good luck!