it's possible the only way to know if the mold in the cup is making him sick by getting him tested for it. i would tell the pediatrician about the mold and that the treatments don't seem to be helping. keep the cup to show the doc but no longer use it for you child. how long has he been on treatments? if more than a week i would definitely take him back to the doctor.
one year old allergic to penilillian found black mold in cup and shows symptoms of being affected by the mold. my one year old is allergic to penicillin and i just recently found black mold in his sippy cup. he has been "sick" for about a month now with a runny nose wet cough and trouble breathing (wheezing) and his pediatrician gave him breathing treatments and a prescription (which i can't remember the name of) but nothing has helped! i want to know if the mold in his cup is the cause of him being sick. help please!