Common Mucinex side effects may include:

Side effects from decongestant medications may include a fast heart rate, rapid breathing, chest discomfort, increased sweating, blurred vision, and dizziness. All of these adverse reactions can mimic the symptoms of anxiety, and in sensitive individuals, may even precipitate panic attacks.

Nausea, vomiting, constipation, dizziness, headache, sleepiness or sleeplessness, and rash are more commonly reported; although, in general, Mucinex is well tolerated at dosages used for expectoration.

• dizziness, headache;
• rash; or.
• nausea, vomiting, stomach upset.

Tell your doctor right away if any of these unlikely but serious side effects occur: dizziness, fainting, shaking (tremor), fast/irregular/pounding heartbeat, difficult/painful urination, mental/mood changes (such as confusion, nervousness, irritability), trouble sleeping, seizures.

The pseudoephedrine in Mucinex D can affect your heart and increase your blood pressure. Symptoms of heart-related side effects include: increased heart rate. pounding heart beat.

How to use Mucinex. Take this medication by mouth with or without food, as directed by your doctor, usually every 12 hours with a full glass of water. If you are self-treating, follow all directions on the product package. If you have any questions, ask your doctor or pharmacist.

It worked great on my congestion, but it is midnight and I am wide awake. I found this site searching for “Does Mucinex DM keep you awake?” Yup, it does.”

Mucinex may also cause: dizziness. headache. drowsiness.

7 things not to do before you go to sleep

• Don’t use any kind of digital technology.
• Don’t take sleeping pills (unless you’ve been diagnosed with insomnia).
• Don’t drink alcohol.
• Don’t work in bed (or anywhere in the bedroom).
• Don’t consume caffeine after 5 p.m.
• Don’t eat fatty foods.
• Don’t exercise.

Mucinex DM combines both immediate-release and extended-release active ingredients, so the effects should begin relatively quickly and last up to 12 hours. Both active ingredients, guaifenesin and dextromethorphan, will begin to show effects in 15-30 minutes.

Guaifenesin is highly effective for loosening mucus and excreting it through nose blowing or coughing. I’ve never had issues with either version or Mucinex when taking them during a sinus infection or bronchitis infection.

Drinking enough liquids, especially warm ones, can help your mucus flow. Water can loosen your congestion by helping your mucus move. Try sipping anything from juice to clear broths to chicken soup. Other good liquid choices include decaffeinated tea and warm fruit juice or lemon water.