A: Fast-Max (All-In-One) treats these common cold & flu symptoms: congestion (nasal, sinus, chest), cough, fever, sore throat, stuffy nose, headache and body pain.

This combination medication is used to temporarily treat cough, chest congestion, fever, body aches, and stuffy nose symptoms caused by the common cold, flu, or other breathing illnesses (such as sinusitis, bronchitis).

Adults and children 12 years of age and over: 20 mL in dosing cup provided every 4 hours. Children under 12 years of age: Do not use. Do not take more than 6 doses in any 24-hour period.

This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely.

Official answer. Mucinex products do not help to prevent or treat the COVID-19 virus itself, but might help relieve some of the symptoms of COVID, like chest congestion, cough, or headache. Select a product that targets only the symptoms you have.

One ingredient in this product is acetaminophen. Taking too much acetaminophen may cause serious (possibly fatal) liver disease. Adults should not take more than 4000 milligrams (4 grams) of acetaminophen a day. People with liver problems and children should take less acetaminophen.

This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages.

See also Warning section. Dizziness, drowsiness, headache, nausea, nervousness, or trouble sleeping may occur. If any of these effects last or get worse, contact your doctor or pharmacist promptly.

Dizziness, drowsiness, nausea, and vomiting may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects.

You shouldn't drink alcohol while taking Mucinex. Mixing alcohol and dextromethorphan, a cough suppressant in some Mucinex products, can cause dizziness, drowsiness, nausea and vomiting. Alcohol and Mucinex can also cause liver damage.

Does Mucinex DM keep you awake? Mucinex DM can cause sleepiness and insomnia. Some people experience sleeplessness if they take it in the late afternoon. Try to take it 30 minutes before bedtime if you are having trouble sleeping due to excessive coughing.

Mucinex and Nyquil Cold & Flu are two common over-the-counter remedies. They can be taken together, but not at night. Mucinex can cause coughing, making it hard to get a good night's sleep.