Is It Safe To Give My Infant Neopeptine Drops Daily, And Could It Affect His Digestion?

Hello doc,my baby boy is 4 months and 24 days old.His birth weight was 3.370kg.Presently his weight is 7.2kg.He is on formula fed.Day to day his formula intake has is very poor and drinks only 500 ml a day.He stays very active and activities are improving. Do I need to give neopeptine drops daily?Does it have any disadvantages??Does giving neopeptine daily would make his body too used to it and would create problems in future for digestion??