You have given an excellent description of your son's reaction to the Klarithran syrup. He has definitely had a typical allergic reaction to this antibiotic. Klarithran is the trade name for an antibiotic called klarithromycin. He must not have this antibiotic again in the future and also cannot have penicillin. Always tell the doctor about his allergies to these antibiotics. It would be best to get him a Medic Alert disc stating that he is allergic to penicillin and klarithromycin. In the meantime continue with the antihistamine until his skin rash has cleared up completely.It would be best to give him Allecet Syrup 5ml once daily as the antihistamine.
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