Mucinex, a combination of drugs with the generic names of dextromethorphan and guaifenesin, is commonly used to treat cough and congestion due to a common cold, infection or allergies. dextromethorphan works by dampening the cough reflex to suppress excessive coughing. Guaifenesin's role is to loosen the mucus that is congesting the throat or chest, which makes it easier to cough it out through the mouth. Several versions of Mucinex are available for caregivers to administer to children, including a liquid which contains phenylephrine HCL, a nasal decongestant.
Upset Stomach
According to the Nurse's Drug Guide, dextromethorphan and guaifenesin may lead to nausea and vomiting. As a result, children who take the medication may have less of an appetite. Constipation and abdominal discomfort may also affect typical eating patterns.These symptoms are generally mild and resolve once the medication is discontinued.
Allergic Reaction
Though not a common side effect, an allergic reaction is possible with any form of Mucinex and should be taken seriously. An allergic reaction may appear in the form of a skin condition, such as a rash or hives. It could also present as difficulty breathing and tightness in the chest. The reaction may also cause swelling, which could take place in the mouth, face, lips or tongue. In the event of a severe allergic reaction, seek immediate medical attention.
Drowsiness/Excitability
Though less likely to cause drowsiness than cough medications containing codeine, it is possible for a child taking Mucinex to become quite drowsy. The Nurse's Drug Guide reports that the dextromethorphan and the phenylephrine HCL have been known to cause excitability, particularly in children. The phenylephrine HCL component can cause nervousness and sleeplessness as well. If MAO inhibitors are also being administered to the child, there is a much higher risk of excitation and low blood pressure. Either extreme warrants contacting a physician.
References
- Drugs.com: Mucinex Childrens Cough
- Nurse's Drug Guide; Billie Wilson; 2005
- Mucinex.com: Drug Facts
