There has been a recent swipe of most of decongestants, cough suppressing medicines, and other cold medicines for little kids from the shelves of all the pharmacies. This is further information on the dangers of cold medicines for the little ones:

A significant number of infants tested positive for cough and cold medicines on a toxicology screen when brought to a hospital emergency room for an apparent life-threatening event (ALTE) in a study done from 1997 to 2006. In 2007, infant cough and cold drugs were withdrawn from the market...

Earlier this year, the FDA warned that the use of over-the-counter (OTC) cough and cold products in infants and toddlers under age 2 could cause "serious and potentially life-threatening side effects." The agency strongly recommends against the use of such medicine in young children. OTC decongestants, expectorants, antihistamines, and cough suppressants can cause serious events, including convulsions, rapid heart rates, decreased levels of consciousness, and death.

Read more at WebMD: Drug Screens Needed for Kids in ER -
Researchers Recommend Routine Drug Screening for Children Who Come to ER With Apparent Life-Threatening Event

The article focuses on measures that ER should take to further filter out the dangerous medicines, but I merely wanted to bring this topic up to stress the importance of cation with any kinds of medication with the small kids. As a parents we feel better whenever we are able to "give" something to a child who is unwell, but our good intentions can actually bring more damage then good.