NCLEX RN Practice Question # 410

guaifenesin (Mucinex)

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What is Mucinex:


Mucinex (guaifenesin) is used to relieve the symptoms of cough and mucus in the chest due to colds, flu, or hay fever. Mucinex may also be used for other conditions as determined by your doctor.


Mucinex is an expectorant. It works by thinning mucus (phlegm) in the lungs and making it less sticky and easier to cough up. This reduces chest congestion by making coughs more productive.

Before using Mucinex.

Some medical conditions may interact with Mucinex. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:


if you are pregnant, planning to become pregnant, or are breast-feeding

if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement

if you have allergies to medicines, foods, or other substances

if you have a chronic cough that occurs with smoking, asthma, chronic bronchitis, or emphysema, or if your cough occurs with large amounts of mucus

Some medicine may interact with Mucinex. Tell your health care provider if you are taking any other medicines. However, no specific interactions with Mucinex are known at this time.


Ask your health care provider if Mucinex may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.


How to use Mucinex:

Use Mucinex Sustained-Release tablets as directed by your doctor. Check the label on the medicine for exact dosing instructions.


Take Mucinex by mouth with or without food.

Drinking extra fluids while you are taking Mucinex is recommended. Check with your doctor for instructions.

Swallow Mucinex Sustained-Release tablets whole. Do not break, crush, or chew a Mucinex tablet before swallowing.

If you miss a dose of Mucinex and you are taking it regularly, take it as soon as possible. If it is almost time for your next dose, skip the missed dose. Go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Mucinex.

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