Phenergen DM syrup is a medication typically used to treat symptoms such as a runny nose, coughing and sneezing that are caused by allergies or a cold. It contains the active ingredient promethazine, which is an antihistamine that works by blocking the effects of histamines, compounds that the body releases when exposed to allergens. The other active ingredient in Phenergen DM is dextromethorphan, a cough suppressant.Continue Reading
Phenergen DM syrup is available only by prescription in the United States. The typical dose is one teaspoon or 5 milliliters. The medication is absorbed rapidly by the digestive system and begins relieving symptoms within 15 to 30 minutes, with the effects typically lasting between three and six hours.
Phenergen DM syrup should not be used by patients who are taking monoamine oxidase inhibitor medications or those who suffer from asthma or COPD. It is not recommended for patients under the age of 2 because of the high risk of respiratory distress in these young patients. Most adults and children over the age of 2 respond well to Phenergen DM syrup, but some do experience side effects such as dizziness, lightheadedness or dry mouth. In many cases, taking a lower dose eases these side effects. Severe side effects, such as decreased coordination and blurry vision, are rare.Learn more about Medications & Vitamins
Mucinex DM is used to treat coughs and cold symptoms. It contains two different medications; guaifenesin, which is an expectorant that loosens and expels mucus, and dextromethorphan HBr, which suppresses coughs, notes WebMD. Adults and children over the age of 12 years can use Mucinex DM, but children under the age of 12 should not use this medication, states the Mucinex website.Full Answer >
The appropriate dosage for Mucinex DM is one or two tablets every 12 hours for adults and children who are 12 years and older. It should be taken with a full glass of water. The maximum dosage is four tablets in 24 hours, according to Drugs.com.Full Answer >
Maximum Strength Mucinex DM is generally used as an expectorant to treat chest congestion and mucus build-up, according to Drugs.com. It also helps suppress coughing.Full Answer >
The letters "DM" in cough syrup are an abbreviation of dextromethorphan, which is a cough suppressant that belongs to a group of drugs called antitussives. It works in the brain to reduce the desire to cough.Full Answer >