What is Vicks VapoRub? Vicks VapoRub contains: Menthol and camphor to calm a cough Eucalyptus and menthol to relieve nose congestion Eucalyptus to relieve catarrh How to use Vicks VapoRub Always use at the first sign of a cold to get maximum benefit. Adults: Rub liberally onto the chest, throat and back,