Is he breast or formula feed? If breast - eliminate ALL dairy from your diet - no cheese, milk, ice cream or yogart ect. If formula - try alimentum or nutramigen. My son did better on nutramigen. Also - check with dr for reflux. Zantac or pepcid will help and cannot cause future damage. Again, pepcid worked better for my son.
have him checked for reflux--they think thats what colic really was/is