Breaks up mucus and relieves cough. Robitussin Dm (Guaifenesin / Dextromethorphan) is okay for loosening congestion in your chest and throat, but it could prevent you from coughing the mucus up. You have to take it more often than other guaifenesin products.
Relieves cold and flu symptoms. Tylenol Cold Multi-Symptom Daytime (Acetaminophen / Dextromethorphan / Phenylephrine) is good for multiple cold symptoms, but it's more medicine than you need if you only have one symptom.
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Robitussin Dm (Guaifenesin / Dextromethorphan) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.
Tylenol Cold Multi-Symptom Daytime (Acetaminophen / Dextromethorphan / Phenylephrine) is a combination medicine that treats cold and flu symptoms. Acetaminophen relieves pain and reduces fever. Dextromethorphan is a cough suppressant. Phenylephrine is a decongestant that clears your sinuses.
› Robitussin Dm (Guaifenesin / Dextromethorphan) is a combination medicine that relieves multiple cold symptoms. It's good to use if you have chest congestion and a cough.
› Helps loosen the mucus and phlegm that builds up and causes productive, wet coughs.
› Tylenol Cold Multi-Symptom Daytime (Acetaminophen / Dextromethorphan / Phenylephrine) is a combination medicine that relieves multiple cold symptoms. It's good to use if you have a stuffy nose, a cough, fever, and pain.
› The decongestant (phenylephrine) has fewer side effects than other decongestants like pseudoephedrine. It doesn't raise your blood pressure and heart rate as much, or cause as much trouble falling asleep.
› The pain reliever (acetaminophen) is easier on your stomach and has fewer drug interactions than other pain medications like aspirin or ibuprofen.
Downsides and risks
Tylenol Cold Multi-Symptom Daytime
› Robitussin Dm (Guaifenesin / Dextromethorphan) isn’t useful if you have a dry cough without mucus or phlegm.
› The two medications in this product could potentially work against each other. Guaifenesin makes mucus easier to cough up, while dextromethorphan (the "DM" in Robitussin Dm (Guaifenesin / Dextromethorphan)) stops you from coughing.
› Needs to be taken more often during the day than other products with guaifenesin, like Mucinex.
› Can cause sleepiness, dizziness, and an upset stomach.
› If you don't really need all of the medications in this combination, you're taking extra medicine and might have extra side effects for no reason.
› Phenylephrine doesn't last as long as other oral decongestants like pseudoephedrine.
› You shouldn't use it if you have high blood pressure.
› To avoid hurting your liver, you have to keep track of the total amount of acetaminophen (APAP) you're taking since it's a very common ingredient in pain and cold/flu combination medicines.
Tips from our pharmacists for people taking the medication
Tylenol Cold Multi-Symptom Daytime
› Drink plenty of fluids while taking Robitussin Dm (Guaifenesin / Dextromethorphan) because liquid helps break down mucus.
› Cough suppressant starts working in 15 to 30 minutes.
› Follow age-specific dosing instructions on how much to take. Don't take more than the recommended dose.
› If your cough lasts more than 7 days, call your doctor.
› Tylenol Cold Multi-Symptom Daytime (Acetaminophen / Dextromethorphan / Phenylephrine) starts working in about 30 minutes.
› Phenylephrine, the decongestant, can make you restless, so don't take it too close to bedtime.
› Contains acetaminophen, also known as Tylenol or APAP. Taking too much can cause liver failure and death. Don't take more than what's recommended on the package or with other Tylenol-containing products.
› If you get the liquid form, use the dosing cup to measure the exact amount of medicine you need.
› Let your doctor know if your symptoms don't improve in a few days, or if you have a really bad sore throat with a fever, headache, nausea, or vomiting.