I apologize, I should have updated my post earlier especially for anyone concerned about side effects. I did have the testing done and was told that the vertigo was caused by displaced crystals in my ears and not the Arikayce. I went back on the Arikayce daily and have not had another episode. I still question the reason, however as I had only the one episode. They asked me to come back for exercises to reposition the crystals which I declined since it had passed and there was no reoccurrence. Thank you all for your input.