Skip to Content

What is the active ingredient present in decongestants that cause drowsiness?

Responses (1)

evelim03 11 Mar 2010

Decongestants are a variety of different medications that help clear up sinus and head congestion. A decongestant or nasal decongestant is a type of drug which is used to relieve nasal congestion.The active ingredients in most ingested decongestants are pseudoephedrine or phenylephrine. Decongestant nasal sprays and eye drops often contain oxymetazoline and are used for topical decongestion. Pseudoephedrine acts indirectly on the adrenergic receptor system while phenylephrine and oxymetazoline are direct agonists. The effects are not limited to the nose and these medicines may cause hypertension (high blood pressure) through vasoconstriction, but most decongestants are not pronounced stimulants due to lack of response from the other adrenoreceptors. Besides hypertension, common side effects include sleeplessness, anxiety, dizziness, excitability, and nervousness.

Drugs.com free discount card

Search for questions

Still looking for answers? Try searching for what you seek or ask your own question.

Similar Questions