Notús Antitusivo (Dextromethorphan Hydrobromide)

Dextromethorphan Hydrobromide is an antitussive that suppresses the cough reflex in the respiratory tract.

• Non‑productive cough: reduces the frequency and intensity of dry cough episodes.
• Temporary cough relief: provides short‑term suppression of cough during colds or upper respiratory infections.
• Cough associated with irritant exposure: alleviates cough triggered by environmental irritants such as smoke or dust.
• Cough in adolescents: offers symptom control for patients aged 12 years and older.
• Symptomatic relief of cough during minor throat irritation: helps improve comfort while the underlying cause resolves.

• Dextromethorphan Hydrobromide acts centrally on the medullary cough centre. It functions as a sigma‑1 receptor agonist and an NMDA receptor antagonist, modulating neuronal activity to raise the threshold for cough initiation, thereby diminishing the cough reflex without affecting respiratory function. The drug does not possess analgesic or anti‑inflammatory properties and does not depress the respiratory drive at therapeutic doses, and it is rapidly absorbed after oral administration.

Common Side Effects

• Nausea: mild stomach upset that may occur after dosing.
• Dizziness: transient light‑headedness, especially when standing quickly.
• Drowsiness: a feeling of sleepiness that can affect alertness.
• Constipation: reduced bowel movements during short‑term use.
• Headache: mild to moderate head pain.
• Dry mouth: reduced salivation leading to a parched feeling.

Serious or Rare Side Effects

• Allergic reactions: rash, itching, swelling, or difficulty breathing.
• Serotonin syndrome: agitation, rapid heart rate, high body temperature when combined with serotonergic drugs.
• Respiratory depression: rare severe slowing of breathing, usually with overdose.
• Hallucinations or psychotic symptoms: visual or auditory disturbances.
• Severe rash or Stevens‑Johnson syndrome: extensive skin involvement.
• Seizures: rare occurrence, particularly in overdose situations.

Before using Notús Antitusivo, consider the following precautions:

• Assess patient history: verify no known hypersensitivity to dextromethorphan or related compounds.
• Review concomitant medications: avoid use with MAO inhibitors or serotonergic agents.
• Evaluate liver function: dose adjustment may be needed in severe hepatic impairment.
• Use in pregnancy and lactation: consult a healthcare professional before use.
• Monitor for signs of serotonin syndrome: educate patients on symptoms.
• Store at ambient temperature below 25°C: keep in the original container, protect from moisture and direct sunlight.

Dextromethorphan Hydrobromide may interact with other medicines. Review patient medication lists carefully.

Major Interactions (Avoid)

• MAO inhibitors: risk of severe serotonin syndrome.
• Serotonergic agents (SSRIs, SNRIs, tricyclic antidepressants): increased risk of serotonin toxicity.
• Other dextromethorphan‑containing products: potential overdose and heightened side effects.
• Strong CYP2D6 inhibitors (e.g., quinidine, fluoxetine): may raise dextromethorphan plasma levels.

Moderate Interactions (Monitor Closely)

• Alcohol: can enhance central nervous system depression.
• Antihistamines: may increase sedative effects.
• Opioid analgesics: additive CNS depression may occur.
• Certain antipsychotics: may potentiate psychotropic side effects.