Milk protein allergy

Kimberley

So the doctors have suspected my lo either has a milk protein allergy or a lactose allergy. The doctor has prescribed us a milk protein free formula which is the Aptamil one. Has anyone else experienced this with their lo? My boy is 4 months in a few days. How long did it take to see any changes? Just curious as my doctor wasn’t very helpful tbh apart from giving us the prescription