Knowra Dextromethorphan Dextromethorphan Dextromethorphan is a cough suppressant that reduces coughing by acting on brain pathways involved in the cough reflex. It is commonly included in over-the-counter cold medicines.
Cough reflex : A protective reflex that expels irritants from the airways through coordinated nerve and muscle activity. Dextromethorphan reduces the brain-mediated drive that produces this reflex.
Over-the-counter drug : A medicine that can be purchased without a prescription under the rules of a jurisdiction. Dextromethorphan is sold without prescription in many countries.
Guaifenesin : An expectorant used to loosen mucus in the respiratory tract. Unlike dextromethorphan, guaifenesin aims to make productive coughs easier to clear.
Dextromethorphan misuse : Use of dextromethorphan in excessive or nonmedical doses, sometimes for dissociative or euphoric effects. High-dose misuse can cause serious neurological and physical harm.
Cough : A forceful respiratory action that clears irritants, mucus, or foreign material from the airways. Dextromethorphan is used to reduce this symptom rather than treat every underlying cause.
Sigma-1 receptor : A protein in cell membranes that modulates signaling in the nervous system. Dextromethorphan binds this receptor, which may contribute to its neurological effects.
Cough medicine : A medicine intended to relieve coughing, whether by suppressing the reflex or treating its cause. Dextromethorphan is a common active ingredient in cough medicines.
Codeine : An opioid medicine used for pain and, in some settings, cough suppression. Codeine suppresses cough through opioid receptors and carries opioid-related risks.
Drug interaction : A change in a medicine’s effects or risks caused by another drug, food, or substance. Interactions can intensify dextromethorphan effects or increase toxicity.
Antitussive : A medicine or substance that suppresses coughing. Dextromethorphan belongs to this class of cough treatments.
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