What liquid medicine helps with a stuffy nose and coughing?

A common liquid medicine that helps relieve a stuffy nose and coughing is a combination of an antihistamine and a cough suppressant, such as a product containing diphenhydramine and dextromethorphan. Additionally, expectorants like guaifenesin can help loosen mucus in the chest and make it easier to cough up. Always consult with a healthcare professional before using any medication to ensure it’s appropriate for your symptoms.