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Title: Be careful!!!
Review: I started using this product nights in my humidifier fall 2009. Came down with acute bronchitis Dec. 2009; had to go to emergency room in Jan. 2010 and subsequently was on oxygen for 10 days. Took 7 weeks to get rid of the bronchitis [and cost me a lot of money]. Guess how I contracted the bronchitis -- the bacteriostatic ingedient in this product: dimethyl benzyl ammonium chloride. [Yes, we were able to isolate this variable in my environment.] Research this ingredient, and you will see that it can indeed induce bronchitis. So be very careful how you use products that contain it!!
