Mucinex, or guaifenesin, is an over-the-counter expectorant that relieves chest congestion, typically associated with a cold, allergy or flu-like condition. It loosens up mucus that then can be coughed up and expelled from the lungs. Mucinex DM is an expectorant used to relieve symptoms caused by such breathing difficulties; thus, Mucinex DM will aid in clearing chest stuffiness and improve breathing. The intake of extra fluids or a glass of water is recommended with this medication, since it will aid in breaking up the congestion and keep the throat from getting dry or sore during excessive coughing episodes. Before taking this medicine, you should be aware of possible side effects.
Gastrointestinal
Several mild side effects have been reported by individuals while taking Mucinex. This group of common side effects includes an upset stomach with diarrhea as well as possible nausea and vomiting. Some abdominal pain also might be present.
Respiratory
Mucinex is for the purpose of alleviating congestion, therefore a productive cough might be experienced. Also, throat irritation can occur as phlegm loosens and material is expelled from the sinuses and/or lungs.
Headaches
Other common, potential side effects of taking Mucinex are headaches and dizziness. Lying down might improve these symptoms.
Serious Effects
Side effects of increasing severity also have been reported by patients taking this expectorant. For example, hypertension and an increased heartbeat have been experienced. Other serious effects include symptoms indicative of an allergic reaction, such as hives and rash, breathing problems and chest tightness. Swelling on the face, including the areas of the mouth, lips and tongue, might occur, which also indicate an allergic reaction. Seek medical care immediately if any of these symptoms appear after taking this medication.
