Mucinex, or guaifenesin, is an over-the-counter expectorant that relieves chest congestion typically associated with a cold, allergy or flulike condition by loosening up mucus that then can be coughed up and expelled from the lungs. Thus individuals who take Mucinex will experience not only a productive cough as the phlegm is removed but also a clearing of chest stuffiness with improved breathing. The intake of extra fluids or a glass of water is recommended to take 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.
Common Effects
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. Other effects that may occur from taking this medication are drowsiness, dizziness and headaches.
Serious Effects
Side effects of increasing severity also have been reported from taking this expectorant. For example, hypertension and an increased heartbeat have been experienced. Other serious effects include those symptoms indicative of an allergic reaction such as hives and rash, breathing problems and chest tightness. Swelling about the face including the areas of the mouth, lips and tongue may occur, which also are indicative of an allergic reaction. Medical care should be sought immediately if any of these symptoms appear after taking this medication.
Precautions
The effects of guaifenesin on nursing infants is not known, thus your physician needs to be informed as to the condition of pregnancy or a breastfeeding newborn. Children under the age of 12 should not take this medication.
