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This investigation was one of the first to expose the dangers of the non-prescription nasal sprays ZICAM and COLD-EEZE. The story began when one consumer complained that she lost her sense of smell from using the product, which contained zinc gluconate. After extensive research using the Internet and contacting taste and smell experts, the investigation took a turn as the companies responsible for the medication began to deny their product had anything to do with loss of smell. Doctors finally admitted to faulty research and COLD-EEZE was pulled from the shelves, while makers of ZICAM are taking another look at the effects of their product.