Benylin

Benylin is a brand name for over‑the‑counter cough and cold preparations manufactured by Honeywell and distributed by a variety of pharmacies. The first product, released in the 1950s, contained diphenhydramine, an antihistamine, and acetylcysteine, a mucolytic agent. Subsequent formulations have included dextromethorphan, guaifenesin, pseudoephedrine, and phenylephrine, depending on the country and the intended treatment of symptoms such as cough, congestion, and throat irritation.

The typical composition of a Benylin cough syrup contains 10 mg dextromethorphan, 200 mg guaifenesin, and a saline base. Benylin cough lozenges and syrups are marketed for short‑term alleviation of non‑productive coughs and upper respiratory tract infections. In some markets, Benylin also offers formulations that combine acetaminophen and phenylephrine for fever and nasal congestion relief.

Standard dosing instructions advise adults and children over 12 years to take 10 ml (two teaspoons) every 4 to 6 hours, not exceeding 5 doses in 24 hours. Children aged 4 to 12 may receive 5 ml (one teaspoon) at the same intervals, while younger children should not use the product without a physician’s guidance. Benylin products contain no prescription medications, but they can interact with other central nervous system depressants and may cause drowsiness.

Common side effects reported include dizziness, dry mouth, nausea, and rash. Rare adverse reactions involve allergic or hypersensitivity responses. Contraindications include known hypersensitivity to any ingredient, severe hepatic impairment, and use of monoamine oxidase inhibitors. Pregnancy category B indicates a lack of conclusive evidence of harm, and lactating women are advised to use with caution. Benylin remains a widely available, non‑prescription remedy for relieving mild cough and cold symptoms in many countries worldwide.