Vicks Vapo Steam Cough Suppressant is for use in hot steam vaporizers; it produces medicated steam that helps to relieve coughs and temporarily relieves coughing associated with a cold. 6.2% camphor solution also includes menthol, cedar leaf oil, eucalyptus oil and nutmeg oil. There are 8 ounces of inhalation solution in a bottle. . WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.p65Warnings.ca.gov.