Warning
Do not use if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric, or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product. . Ask a doctor use if you have persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema, cough that occurs with too much phlegm (mucus). When using this product do not use more than directed. Stop use and ask a doctor if cough lasts more than 7 days, comes back, or occurs with fever, rash, or headache that lasts. These could be signs of a serious condition. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away. Tamper Evident: Do not use if neckband on bottle cap is broken or missing. Do not take Mucinex Fast-Max DM Max and Mucinex Nightshift Cold & Flu at the same time. Always wait at least 4 hours before taking another dose of Mucinex liquid. Take only as directed.