Why Vicks VapoRub Is Not Recommended for Newborns?
Vicks VapoRub contains three active ingredients: camphor, menthol, and eucalyptus oil. In adults, these create a cooling sensation that eases the feeling of congestion. In infants, especially newborns, the same compounds can be dangerous.
The manufacturer's own label states the product should not be used on children under 2 years of age. This is not cautious over-statement. Research has shown that camphor and menthol can overstimulate an infant's airways, causing mucous membranes to produce more secretions rather than fewer. A newborn's airway is narrow to begin with, so any increase in secretions or swelling can quickly turn uncomfortable breathing into a genuine emergency.
Camphor is also absorbed through the skin more readily in infants than in adults, raising the risk of systemic toxicity even from external application. So to answer a common question directly: is vaporub safe for babies under 2? No. There is no safe dose or application site for this age group.