I don't know, some say yes while majority of the articles I read online tonight say no. Regardless, the last two nights Jie has been having coughing fits so severe that it's brought me to tears. His stomach muscles are so weak and the doctors seem to be saying the same thing. Because he doesn't have a wheeze, they just tell me to give him two puffs of his puffer every four hours. They don't seem to listen when I say it's not helping!! I'm so frustrated today that Matt and I cleaned the house thoroughly and have set in place strict areas where our kittens can and can't wonder. I'm also thinking of getting an air purifier as well as making my own sensitive laundry liquid. I'll do anything possible to have my happy little boy back.