Caution should always be used when taking combinations of medications that may reduce the efficacy of the other medication. Staying properly hydrated with water is an important factor in helping to reduce the frequency of having thick secretions which are then difficult to cough up.
There are many other medications that can help, but they are typically reserved for chronic issues related to cystic fibrosis, chronic COPD, and other respiratory conditions. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page.
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Updated July 15, Guaifenesin Oral Route. PubMed Health website. Updated October 1, Rubin, BK. Mucolytics, Expectorants, and Mucokinetic Medications. Mucinex DM contains an additional drug called dextromethorphan. This drug helps control your cough. It works by affecting signals in your brain that trigger your cough reflex. This lessens your coughing. Both Mucinex and Mucinex DM are available as tablets you take by mouth. You can take one or two tablets of either drug every 12 hours.
For either drug, you should not take more than four tablets in 24 hours. The tablets should not be used in people younger than 12 years.
Shop for Mucinex. Mucinex and Mucinex DM tablets also both come in maximum-strength versions. These medicines contain double the amount of active ingredients.
You should take no more than one maximum-strength tablet every 12 hours. Do not take more than two tablets in 24 hours. Shop for Mucinex DM. The packaging for the regular-strength and maximum-strength products is similar. There is also a liquid version of Mucinex DM available, but only in the maximum-strength form.
Talk to your doctor or pharmacist to decide which form is right for you. Mucinex DM liquid is only for people 12 years or older. Shop for liquid Mucinex DM. There are Mucinex liquid products that are made especially for children 4 to 11 years of age. Most people tolerate these medications very well. However, at higher dosages, the likelihood of side effects from the drugs in Mucinex and Mucinex DM increases.
The chart below lists examples of possible side effects of Mucinex and Mucinex DM. These drugs are called monoamine oxidase inhibitors, or MAOIs. Examples of these drugs include:. Call your doctor for medical advice about side effects. Ask a doctor or pharmacist before using other cough or cold medicines that may contain similar ingredients. Avoid driving or hazardous activity until you know how this medicine will affect you.
Your reactions could be impaired. Use Mucinex Guaifenesin exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Use exactly as directed on the label, or as prescribed by your doctor. Cold or cough medicine is only for short-term use until your symptoms clear up.
Always follow directions on the medicine label about giving cough or cold medicine to a child. Do not use the medicine only to make a child sleepy. Death can occur from the misuse of cough or cold medicines in very young children. Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device not a kitchen spoon. To use guaifenesin granules, pour out the entire packet onto your tongue and swallow without chewing.
Call your doctor if your symptoms do not improve after 7 days, or if you have a fever, rash, or headaches. This medicine can affect the results of certain medical tests.
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