Vicks 44 Pediatric  Vicks 44 Pediatric can be one of two therapies, Vicks 44M Pediatric or Vicks 44E Pediatric, marketed in North America under the Vicks brand of Procter & Gamble. Vicks 44M Pediatric (or 44M) is an oral combination therapy for breathing difficulties. Active ingredients include dextromethorphan, pseudoephedrine and chlorpheniramine. The combination of antihistamine, de-congestant and cough suppressant is designed to relieve the symptoms of several minor breathing complaints, such as the common cold. Possible side effect include drowsiness, dizziness, nausea, constipation, blurred vision, upset stomach and dry mouth nose and throat. Vicks 44E Pediatric (or 44E) is an oral combination therapy for breathing difficulties. Active ingredients are dextromethorphan and guaifenesin a cough suppressant and an expectorant, respectively. Common side effects include drowsiness, dizziness and upset stomach.