Inactive Ingredients: Citric Acid Anhydrous, D&C Red 33, Edetate Disodium, Ethylcellulose, FD&C Blue 1, Flavor, High Fructose Corn Syrup, Methylparaben, Partially Hydrogenated Vegetable Oil (Soybean, Cottonseed), Polyethylene Glycol 3350, Polysorbate 80, Propylene Glycol, Propylparaben, Purified Water, Sucrose, ...

Delsym 12 Hour's powerful medicine uses a time-release formula that provides cough relief for up to 12 hours.

Reckitt Delsym is an American brand of cough medicine owned by Reckitt, and manufactured at Unither Manufacturing in Rochester, NY.

Dextromethorphan is a cough suppressant that is used to treat cough caused by the common cold or flu. There are many brands and forms of dextromethorphan available. Not all brands are listed on this leaflet.

Delsym contains Dextromethorphan Polistirex, the active ingredient that helps quiet your cough by suppressing your cough reflex.

Delsym Nighttime Cough is a combination of three medications: acetaminophen (an analgesic), dextromethorphan (a cough suppressant), and triprolidine (an antihistamine). It's used to treat symptoms from the common cold and flu and is available over the counter.

Slight drowsiness/dizziness, nausea, or vomiting may occur. Rarely, some people may experience severe drowsiness/dizziness with normal doses. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Dextromethorphan (Delsym) is an antitussive medication, which is another name for a cough suppressant. It works on the part of your brain that makes you cough. Its actions on the brain make you cough less.

Ask a doctor before use if you have

Delsym® was one of the leading pioneers in developing long-lasting cough syrup in the 1980s, and the first cough syrup to deliver up to 12 hours of cough relief. Delsym's long-lasting system is so unique that it inspired the brand's name “DELivery SYsteM.”

It's similar or better than other cough relief medications that I've used before. I would recommend it if you are coughing. It works well and helps me sleep through the night or if you are sick.

Delsym has an average rating of 3.3 out of 10 from a total of 236 reviews on Drugs.com. 16% of reviewers reported a positive experience, while 69% reported a negative experience.

Dextromethorphan (Delsym) is a cough suppressant. It's usually well-tolerated. But it can cause mild side effects like nausea, dizziness, and drowsiness. More serious dextromethorphan side effects include serotonin syndrome.