dextromethorphan + phenylephrine

Dextromethorphan + phenylephrine is an oral combination pharmaceutical product used primarily for the **temporary relief of cough and nasal congestion** associated with the common cold, flu, and upper respiratory tract infections. - **Dextromethorphan** is a non-opioid antitussive (cough suppressant) that acts centrally on the cough center in the medulla oblongata to reduce the cough reflex, without the analgesic or addictive properties associated with opioid cough suppressants. - **Phenylephrine** is a sympathomimetic decongestant that acts as an alpha-1 adrenergic receptor agonist, causing vasoconstriction in nasal mucosa to decrease swelling and congestion. This combination does not treat the underlying infection or cause of symptoms, but provides symptomatic relief. It is available over-the-counter in various formulations, sometimes as part of multi-ingredient cough/cold preparations[5][8].