Mucinex 600mg ER Tablets
It is used to thin mucus so it can be taken from the body by coughing.
Drug Class
Expectorant
Pharmacologic Class
Mucolytic agent (indirect)
Pregnancy Category
Category C
FDA Approved
Jan 1970
DEA Schedule
Not Controlled
Overview
What is this medicine?
Guaifenesin is an expectorant that helps to thin and loosen mucus in your lungs and airways, making it easier to cough up. This can help relieve chest congestion caused by colds, bronchitis, and other breathing illnesses.
How to Use This Medicine
Taking Your Medication
To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely. You can take this medication with or without food, but if it causes stomach upset, take it with food to help minimize discomfort. Drink plenty of non-caffeinated liquids, unless your doctor advises you to limit your fluid intake. Swallow the medication whole - do not chew, break, or crush it.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry place, away from the bathroom. Keep all medications in a safe location, out of the reach of children and pets. Dispose of unused or expired medications properly. Do not flush them down the toilet or pour them down the drain unless instructed to do so by your doctor or pharmacist. If you have questions about disposing of your medication, consult with your pharmacist, who may be aware of drug take-back programs in your area.
What to Do If You Miss a Dose
If you take this medication on a regular schedule, take the missed dose as soon as you remember. However, if it's close to the time for your next dose, skip the missed dose and resume your regular dosing schedule. Do not take two doses at the same time or take extra doses. If you take this medication as needed, do not take it more frequently than directed by your doctor.
To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely. You can take this medication with or without food, but if it causes stomach upset, take it with food to help minimize discomfort. Drink plenty of non-caffeinated liquids, unless your doctor advises you to limit your fluid intake. Swallow the medication whole - do not chew, break, or crush it.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry place, away from the bathroom. Keep all medications in a safe location, out of the reach of children and pets. Dispose of unused or expired medications properly. Do not flush them down the toilet or pour them down the drain unless instructed to do so by your doctor or pharmacist. If you have questions about disposing of your medication, consult with your pharmacist, who may be aware of drug take-back programs in your area.
What to Do If You Miss a Dose
If you take this medication on a regular schedule, take the missed dose as soon as you remember. However, if it's close to the time for your next dose, skip the missed dose and resume your regular dosing schedule. Do not take two doses at the same time or take extra doses. If you take this medication as needed, do not take it more frequently than directed by your doctor.
Lifestyle & Tips
- Drink plenty of fluids (water, juice) to help thin mucus and improve the drug's effectiveness.
- Avoid smoking, as it can worsen cough and congestion.
- Humidifiers can help moisten the air and soothe irritated airways.
- Do not crush, chew, or break the extended-release tablet; swallow it whole.
Available Forms & Alternatives
Dosing & Administration
Adult Dosing
Standard Dose:
600 mg to 1200 mg orally every 12 hours
Dose Range:
600 - 1200 mg
Condition-Specific Dosing:
maximumDailyDose:
2400 mg per 24 hours
Pediatric Dosing
Neonatal:
Not established
Infant:
Not established
Child:
Not established for ER formulation (generally not recommended for children under 12 years)
Adolescent:
12 years and older: 600 mg to 1200 mg orally every 12 hours (Max 2400 mg/day)
Dose Adjustments
Renal Impairment:
Mild:
No specific adjustment recommended
Moderate:
No specific adjustment recommended
Severe:
Use with caution; consider lower doses or extended intervals due to potential accumulation of metabolites, though not extensively studied.
Dialysis:
Not well studied; likely not dialyzable due to rapid metabolism. Use with caution.
Hepatic Impairment:
Mild:
No specific adjustment recommended
Moderate:
No specific adjustment recommended
Severe:
Use with caution; consider lower doses or extended intervals due to potential for impaired metabolism, though not extensively studied.
Pharmacology
Mechanism of Action
Guaifenesin is an expectorant that works by increasing the volume and decreasing the viscosity of secretions in the respiratory tract. It is thought to act by irritating the gastric mucosa, which stimulates vagal nerve endings and reflexively increases respiratory tract fluid secretion. This action helps to loosen phlegm and thin bronchial secretions, making coughs more productive.
Pharmacokinetics
Absorption:
Bioavailability:
Well absorbed
Tmax:
Approximately 2.6 hours (for 600mg ER)
FoodEffect:
Food may slightly delay absorption but does not significantly affect the extent of absorption.
Distribution:
Vd:
Not extensively reported, but widely distributed
ProteinBinding:
Not extensively protein bound
CnssPenetration:
Limited
Elimination:
HalfLife:
Approximately 1 hour (for immediate release, extended for ER formulation)
Clearance:
Rapid
ExcretionRoute:
Renal excretion of metabolites
Unchanged:
<1%
Pharmacodynamics
OnsetOfAction:
Within 30 minutes (for immediate release, slightly longer for ER)
PeakEffect:
Not precisely defined for expectorant action, but related to peak plasma concentrations.
DurationOfAction:
Up to 12 hours (for extended-release formulation)
Confidence:
Medium
Safety & Warnings
Side Effects
Urgent Side Effects: Seek Medical Help Right Away
Although rare, this medication can cause severe and potentially life-threatening side effects. If you experience any of the following symptoms, contact your doctor immediately or seek emergency medical attention:
- Signs of an allergic reaction, such as:
- Rash
- Hives
- Itching
- Red, swollen, blistered, or peeling skin (with or without fever)
- Wheezing
- Tightness in the chest or throat
- Difficulty breathing, swallowing, or talking
- Unusual hoarseness
- Swelling of the mouth, face, lips, tongue, or throat
Other Possible Side Effects
Like all medications, this drug can cause side effects. However, many people do not experience any side effects or only have mild ones. If you have side effects that bother you or persist, contact your doctor for advice.
Reporting Side Effects
This list does not include all possible side effects. If you have questions or concerns about side effects, consult your doctor. For medical advice about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Although rare, this medication can cause severe and potentially life-threatening side effects. If you experience any of the following symptoms, contact your doctor immediately or seek emergency medical attention:
- Signs of an allergic reaction, such as:
- Rash
- Hives
- Itching
- Red, swollen, blistered, or peeling skin (with or without fever)
- Wheezing
- Tightness in the chest or throat
- Difficulty breathing, swallowing, or talking
- Unusual hoarseness
- Swelling of the mouth, face, lips, tongue, or throat
Other Possible Side Effects
Like all medications, this drug can cause side effects. However, many people do not experience any side effects or only have mild ones. If you have side effects that bother you or persist, contact your doctor for advice.
Reporting Side Effects
This list does not include all possible side effects. If you have questions or concerns about side effects, consult your doctor. For medical advice about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Seek Immediate Medical Attention If You Experience:
- Cough that lasts more than 7 days or comes back
- Cough with fever, rash, or persistent headache
- Signs of an allergic reaction (e.g., hives, difficulty breathing, swelling of face/lips/tongue/throat)
- Severe dizziness or headache
- Nausea or vomiting that is severe or persistent
Before Using This Medicine
Before Taking This Medication: Important Information to Share with Your Doctor
It is essential to inform your doctor about the following:
Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction and its symptoms.
If you experience a cough that produces a significant amount of mucus, a persistent cough caused by smoking or exposure to smoke, or lung conditions like asthma or emphysema.
This list is not exhaustive, and it is crucial to discuss all potential interactions with your doctor. To ensure safe treatment, provide your doctor and pharmacist with a comprehensive list of:
All prescription and over-the-counter (OTC) medications you are taking
Any natural products or vitamins you are using
* Your existing health problems
Before starting, stopping, or adjusting the dose of any medication, including this one, consult with your doctor to confirm that it is safe to do so in conjunction with your other medications and health conditions.
It is essential to inform your doctor about the following:
Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction and its symptoms.
If you experience a cough that produces a significant amount of mucus, a persistent cough caused by smoking or exposure to smoke, or lung conditions like asthma or emphysema.
This list is not exhaustive, and it is crucial to discuss all potential interactions with your doctor. To ensure safe treatment, provide your doctor and pharmacist with a comprehensive list of:
All prescription and over-the-counter (OTC) medications you are taking
Any natural products or vitamins you are using
* Your existing health problems
Before starting, stopping, or adjusting the dose of any medication, including this one, consult with your doctor to confirm that it is safe to do so in conjunction with your other medications and health conditions.
Precautions & Cautions
It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Be aware that different brands of this drug may be approved for use in children of various ages, so it is crucial to consult with your doctor before administering this drug to a child. If you are pregnant, planning to become pregnant, or are breastfeeding, you must discuss this with your doctor to carefully weigh the benefits and risks of this medication to both you and your baby.
Overdose Information
Overdose Symptoms:
- Nausea
- Vomiting
- Dizziness
- Diarrhea
- Abdominal pain
- Kidney stones (with very high, prolonged doses)
What to Do:
Seek immediate medical attention or call a Poison Control Center (1-800-222-1222). Treatment is generally supportive.
Drug Interactions
Minor Interactions
- Laboratory tests: May interfere with certain laboratory tests for 5-hydroxyindoleacetic acid (5-HIAA) and vanillylmandelic acid (VMA), potentially causing false positive results.
Monitoring
Symptom Monitoring
- Effectiveness in reducing cough and thinning mucus
- Resolution of cold/flu symptoms
- Development of new or worsening symptoms (e.g., fever, rash, persistent headache)
- Signs of allergic reaction (e.g., rash, itching, swelling)
Special Patient Groups
Pregnancy
Guaifenesin is classified as Pregnancy Category C. While animal studies have not shown significant harm, there are no adequate and well-controlled studies in pregnant women. It is generally considered low risk for short-term use, but should be used only if clearly needed and the potential benefit outweighs the potential risk to the fetus.
Trimester-Specific Risks:
First Trimester:
Generally avoided if possible, especially during organogenesis, though data do not suggest major teratogenic risk.
Second Trimester:
Considered safer than first trimester, but still use with caution.
Third Trimester:
Considered safer than first trimester, but still use with caution.
Lactation
Guaifenesin is excreted into breast milk in small amounts. It is generally considered compatible with breastfeeding at usual therapeutic doses, as adverse effects in breastfed infants are unlikely. Monitor the infant for any signs of gastrointestinal upset or drowsiness.
Infant Risk:
Low risk (L3 - Moderately safe)
Pediatric Use
Extended-release guaifenesin is not recommended for children under 12 years of age. For children 6-11 years, immediate-release formulations may be used under medical guidance. Always consult a pediatrician before administering cough and cold medications to young children.
Geriatric Use
No specific dose adjustment is typically required for elderly patients. However, elderly patients may be more sensitive to the effects of the drug and may have age-related renal or hepatic impairment, warranting caution and monitoring for adverse effects.
Clinical Information
Clinical Pearls
- Advise patients to drink plenty of water to maximize the expectorant effect of guaifenesin.
- Emphasize that extended-release tablets must be swallowed whole and not crushed or chewed.
- Guaifenesin is an expectorant, not a cough suppressant. It helps make coughs more productive, not stop them.
- Inform patients about potential interference with certain lab tests (5-HIAA, VMA) if they are undergoing such tests.
- Educate patients that if their cough persists for more than 7 days, worsens, or is accompanied by high fever, rash, or persistent headache, they should consult a healthcare professional.
Alternative Therapies
- Hydration (primary non-pharmacological intervention)
- Humidifiers
- Saline nasal sprays/washes
- Honey (for cough relief in adults and children >1 year)
- Other expectorants (e.g., N-acetylcysteine, though different mechanism and indication)
Cost & Coverage
Average Cost:
$10 - $30 per 30 tablets
Generic Available:
Yes
Insurance Coverage:
Tier 1 (Generic) / Tier 2-3 (Brand)
General Drug Facts
If your symptoms or health issues persist or worsen, it is essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it's a good idea to check with your pharmacist for more information. If you have any questions or concerns about this medication, don't hesitate to reach out to your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek medical attention. When seeking help, be prepared to provide details about the medication, including the amount taken and the time it happened, to facilitate prompt and effective treatment.