My 6 month old has an allergy to milk protein and his eczema will flare up badly especially where milk has been in contact as well as diarrhoea if ingested. Washing off it disappears in ~2h. Nursery is insisting they have antihistamine for him in case he has some accidentally but is presrption only at 6 months. I have some but only from when it was horrendous when he was very poorly and it knocks him out. We are trialling foods at the moment and are still not expected to use it for this so can a nursery insist we give it to them?