Skittling is a slang word that can refer to eating a candy called Skittles along with an energy drink, that is, a drink with high levels of caffeine. Skittling also can mean taking cold remedies in small pills that look like Skittles candy in order to get high. Eating candy along with an energy drink is not particularly dangerous. What is dangerous is to mix energy drinks with alcohol, a common practice on college campuses. The combination of a stimulant (caffeine) with a depressant (alcohol) could cause cardiopulmonary or cardiovascular failures. Skittling or eating pills meant for colds and flu is dangerous to your health. The ingredient that makes you feel euphoria and relaxed is a cough suppressant called dextromethorphan. The ingredients that can endanger your health are the pain relievers in these medications, such as acetaminophen and ibuprofen. Taking them in amounts above medical recommended levels can damage vital organs such as the liver and kidneys.