My ds3 has asthma and is on 2 puffs twice daily of brown inhaler and blue inhaler when required (which is all the time). he gets chest infections all the time (atleast once a month) that requires steroids and antibiotics. when he was younger the antibiotics alone would clear it but now he needs steroids too. his last infection was friday 11th march he was given the steroids and the antibiotics but they didnt completely clear it this time and now the infection is back already. can antibiotics become less effective the more they are taken? what questions should i be asking the doctor? or is this normal for an asthmatic? will all these infections be doing any damage to his lungs? hes only 3.7 years old.