Thank you so much for your reply. Yes he is under steroid and zyrtec maintainance and I want him to be off it so first try to avoid attack for months from now. His blood work shows high allergic in dust mite and we are working on replacing whole house carpet with hardwood. We don't have pets, but the latest attack happened after he visited a house with dog and cat (he didn't touch though). Can you tell me the brand of silver for nebulizer and for internal (MesoSilver maybe?)? Thanks a lot! Also I contacted Herb Pharm before, Mulliem is safe for his age, not Lobelia. In summary, I tried to avoid all possible allergens while be prepared for respiratory infections that will cause him wheeze. Thanks a lot!!!