Dextromethorphan and guaifenesin
Generic name: dextromethorphan and guaifenesin [ DEX-troe-me-THOR-fan-and-gwye-FEN-e-sin ]
Brand names: Aquatab DM, Broncotron, Coricidin HBP Chest Congestion & Cough, DayQuil Mucus Control DM, Delsym Cough Plus Chest Congestion DM, ... show all 176 brands Fenesin DM IR, G-Zyncof, Mucinex DM, Phlemex, Robitussin Cough + Chest Congestion DM, Safetussin DM, Siltussin DM, TabTussin DM, Tussin DM, Zyncof, Gani-Tuss-DM NR, Guaibid DM, Guaifenex DM, Muco-Fen DM, Guiadrine DM, Fenex-DM, Iobid DM, Q-Bid DM, Aquabid DM, Touro DM, Respa-DM, Mucobid DM, Fenesin DM, Humibid DM Pediatric, Iofen-DM NF, Phanatuss, Naldecon Senior DX, Guiatussin-DM, Halotussin DM, Guiatuss DM, Halotussin DM Sugar Free, Rhinosyn-DMX, Tuss-DM, Kolephrin GG/DM, Cheracol D Cough, Genatuss DM, Glycotuss-DM, Mytussin DM, Tolu-Sed DM, Benylin Expectorant, Vicks 44E Pediatric, Guiacough DM, Lotussin DM, Anti-Tuss DM, Biotuss DM, Cheracol-D, GG/DM, Mastussin DM, Recofen D, Recofen Plus, Ri-Tussin DM, Robafen DM, Robichem DM, T-Tussin DM, Tusscidin DM, Bidex-DM, Diabetic Suppressant, Duraganidin, G Bid DM, GG-DM SR, Humigen DM, Tussidin DM, Altarussin DM, Amibid DM, Guiat Clear DM, Cough Formula-DM, Double-Tussin DM, Guaiasorb Cough Medicine, Kita La Tos, Q-Tussin DM, Scot-Tussin DM, Nalspan Senior DX, Diabetic Tuss DM, Vicks 44E, Scot-Tussin Senior, Naldecon DX Liquigel, Safetussin 30 DM, Duratuss DM, Guiatuss Clear, Iophen DM NR, Allfen-DM, S-Pack DM, HT Tuss DM, Monafed DM, Hydro-Tuss DM, Drituss DM, Guaifen DM, Maxi-Tuss DM, Robitussin-SF, Su-Tuss DM, Muco-Fen 800 DM, Guai-Dex, GuaiFENesin DM, GuaiFENesin DM SR, Tussi-Bid, Sudal DM, Iophen DM, Ru-Tuss 800 DM, Mintab DM, Mindal DM, Atuss-12 DX, Z-Cof LA, Extuss LA, DuraDEX, Humibid CS, Diabetic Tuss DM Maximum Strength, Siltussin DM DAS Cough Formula, Simuc-DM, Cofex-DM, Mucus Relief DM, G-Bid DM, Relacon LAX, Ambi 1000/55, Z-Cof LAX, Robafen DM Clear, DuraDEX Forte, Robitussin DM Infant Drops, Zotex DMX, Tussi-Organidin DM NR, Tussi-Organidin DM-S NR, Mucinex Children's Cough, Duratuss DM 12, Robitussin Cough Sugar-Free DM, Dex-Tuss DM, Bidex-A, Mucinex DM Maximum Strength, GuaiFENesin DM NR, Children's Mucus Relief Cough, Siltussin-DM DAS-NA, Siltussin-DM DAS-NA Maximum Strength, ExeFen-DM, Bidex-DMI, Coricidin HBP Chest Congestion and Cough, Mucinex Children's Cough Mini-Melts, Robitussin Cough and Congestion, Allfen DM, Robitussin Cough and Congestion DM Max, Robitussin DM Sugar Free, Tussin Cough, Robitussin DM To Go, Tussin DM Clear, Congesta DM, Robafen DM Max, Robitussin Cough + Chest Congestion DM Peak Cold Sugar-Free, Robitussin Cough + Chest Congestion DM Peak Cold, Robitussin Cough+Chest Cong DM, Mucinex Fast-Max DM Max, Tusnel Diabetic, G-Tron, Children's Delsym Cough+Chest Congest DM, DayQuil Nature Fusion, Tussin DM Max, Creo-Terpin, Pecgen DMX, Children's Triaminic Cough and Congestion, Trispec DMX, Robitussin Cough + Chest Congestion DM Maximum Strength, Children's Robitussin Cough and Chest, Giltuss Cough and Chest Congestion, Children Giltuss Cough and Chest Congestion, Robitussin Peak Cold Max Strength Cough+Chest Congestion DM, Guaiasorb DM, Children's Robitussin Cough and Chest Congestion DM, Adult Cough DM, Robafen DM Cough and Chest Congestion, Maximum Strength Mucus DM, Giltuss Diabetic Cough and Cold, Diabetic Tussin DM, Mucinex Children's FreeFrom Cough and Mucus, Mucus DM, Geri-Tussin DM
Dosage forms: oral capsule (10 mg-200 mg); oral granule (5 mg-100 mg); oral liquid (10 mg-100 mg/10 mL; 10 mg-100 mg/5 mL; 10 mg-150 mg/5 mL; 10 mg-187 mg/5 mL; 10 mg-200 mg/15 mL; 10 mg-200 mg/5 mL; 10 mg-300 mg/5 mL; 15 mg-100 mg/5 mL; 15 mg-125 mg/5 mL; 15 mg-200 mg/5 mL; 20 mg-200 mg/10 mL; 20 mg-200 mg/20 mL; 20 mg-400 mg/20 mL; 20 mg-400 mg/5 mL; 5 mg-100 mg/5 mL; 6.67 mg-66.7 mg/5 mL); oral tablet (15 mg-400 mg; 20 mg-400 mg); oral tablet, extended release (20 mg-1200 mg; 28 mg-835 mg; 30 mg-600 mg; 60 mg-1200 mg)
Drug class: Upper respiratory combinations
What is dextromethorphan and guaifenesin?
Dextromethorphan will not treat a cough that is caused by smoking.
There are many brands and forms of this medication available and not all brands are listed on this leaflet.
Dextromethorphan and guaifenesin may also be used for purposes not listed in this medication guide.
Do not use dextromethorphan and guaifenesin if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.
Before taking this medicine
Do not use this medicine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, and tranylcypromine.
Ask a doctor or pharmacist if this medicine is safe to use if you have:
Ask a doctor before using this medicine if you are pregnant or breast-feeding.
This medicine may contain phenylalanine. Check the medication label if you have phenylketonuria (PKU).
How should I take dextromethorphan and guaifenesin?
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).
You may need to shake the liquid before you measure a dose. Follow all directions on the label.
Swallow the extended-release tablet whole and do not crush, chew, or break it.
Sprinkle the granules directly onto your tongue and swallow right away.
Drink extra fluids to help loosen the congestion and lubricate your throat while you are taking dextromethorphan and guaifenesin.
Call your doctor if your symptoms do not improve after 7 days, or if you have a fever, rash, or headaches.
If you need to have any type of surgery, tell the surgeon ahead of time if you have taken this medicine within the past few days.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Since dextromethorphan and guaifenesin is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking dextromethorphan and guaifenesin?
Avoid driving or hazardous activity until you know how dextromethorphan and guaifenesin will affect you. Your reactions could be impaired.
Drinking alcohol with this medicine can cause side effects.
Ask a doctor or pharmacist before using other cough or cold medicines that may contain similar ingredients.
Dextromethorphan and guaifenesin side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
This medicine may cause serious side effects. Stop using this medicine and call your doctor at once if you have:
Common side effects of dextromethorphan and guaifenesin may include:
sleep problems (insomnia);
feeling nervous, restless, anxious, or irritable;.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect dextromethorphan and guaifenesin?
Avoid using dextromethorphan and guaifenesin with other drugs that cause drowsiness or slow your breathing (such as opioid medicine, a muscle relaxer, or medicine for anxiety or seizures).
Ask a doctor or pharmacist before using this medicine if you are also using any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.
More about dextromethorphan / guaifenesin
- Side effects
- Drug interactions
- Dosage information
- During pregnancy
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- En español
- Drug class: upper respiratory combinations
- Patient Information
- Guaifenesin and Dextromethorphan Extended-Release Tablets
- Guaifenesin and Dextromethorphan Granule Packets
- Guaifenesin and Dextromethorphan Liquid
- Other brands
- Mucinex DM, Robitussin Cough + Chest Congestion DM, Tussin DM, Coricidin HBP Chest Congestion & Cough, ... +16 more
Related treatment guides
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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