In my opinion your baby is still highly allergic to cow's milk as reflected by the urticarial rash he developed on his chin and his reaction to the margarine with milk solids. He should definitely remain on the Similac Alimentum. Use a margarine which does not contain milk solids such as Cardin or Ole.Your son should have a skin prick test done to cow's milk and also a RAST test for cows milk. This will enable you to find out what is present allergy status is and whether he is above or below the cut off point values for safety and the likelihood of another anaphylactic episode. If you let me know what these values are I will be able to advise you further ie the size in millimetres of his skin test reaction and the actual result of his RAST test.Your son should be seen and followed up by a paediatric allergist.
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