What Is The Right Quantity Of Lactogen To Be Given To Infants?

Hi,My son is 4 months old and I give him 50 ml with 3 spoon full of lactogen. He feel hungry in every one hour. He never take more than 50 - 60 ml milk n refuses if its more than that. Please guide me how much quantity should be given in 50 ml water and how can I help him to get undisturbed sleep at night and day as he wake up in every hour.I am giving him lactogen 1.