Medications of children related to cough and cold are coming under the preview of federal drug regulators. According to them, impacts of the suggested doses have not been studied enough in children.

Dr. Charles J. Ganley, an official of Food and Drug Administration, stated the agency was revisiting the risks and benefits of the use of these drugs in children, especially those younger than 2 years old.
Some pediatricians and public health officials have urged the agency to ban drug manufacturers from marketing such remedies as Toddler's Dimetapp, Infant Triaminic and Little Colds to children under 6.
It has been postulated that drugs which are offered as an antidote to cold might lead to heart arrhythmias, hypertension and even stroke. At times, children also develop some health problem after consuming the suggested doses.
The pediatricians who appealed the FDA accepted that children's cold medicines were generally safe in recommended doses however, they are given more than one medicine for some or the other reasons.
So, its okey to keep these medications to your kid but do not over do them, after all they are medicines and might carry a side effect.