Dexpoten Plus: A Combined Cough Suppressant for Cold & Allergy Symptoms

Dexpoten Plus is a combination medication that acts as an antitussive (cough suppressant), decongestant, and antihistamine agent. It is indicated for the temporary relief of various symptoms associated with the common cold, hay fever (allergic rhinitis), or other upper respiratory allergies.

How Dexpoten Plus Works (Pharmacology)

This preparation combines three active ingredients, each with a distinct mechanism:

• Dextromethorphan (Antitussive): A safe, effective, non-narcotic antitussive agent that acts centrally on the cough center in the medulla of the brain. Although structurally related to Morphine, it lacks analgesic and habit-forming properties and generally has little sedative activity.
• Phenylephrine (Decongestant): A decongestant that works by shrinking blood vessels in the nasal passages. This action helps to treat nasal and sinus congestion, as well as congestion in the tubes that drain fluid from the inner ear.
• Triprolidine (Antihistamine): A potent competitive histamine H1-receptor antagonist of the pyrrolidine class. It provides symptomatic relief in conditions believed to be caused by the release of histamine. It has mild central nervous system depressant properties, which may cause drowsiness.

Key Indications & Benefits

Dexpoten Plus temporarily relieves symptoms due to common cold, hay fever (allergic rhinitis), or other upper respiratory allergies, including:

• Cough due to minor throat or bronchial irritation
• Runny nose
• Sneezing
• Itching of the nose or throat
• Itchy, watery eyes
• Nasal congestion
• Reduces swelling of nasal passages

Dosage & Administration

Dexpoten Plus should be taken with or without food; take with food if it causes an upset stomach. Liquid doses should be measured carefully using the provided measuring device. Always consult a registered physician for medication use.

• Adults & Children 12 years of age and older: 1 teaspoonful (5 ml) every 4 hours, or as directed by a doctor.
• Children 6 to under 12 years of age: ½ teaspoonful (2.5 ml) every 4 hours, or as directed by a doctor.
• Children 2 to 6 years: To be used with caution, and as advised by the physician.
• Children below 2 years old: Not to be used.

Important Considerations & Warnings

It is crucial to discuss your full medical history with your doctor before taking Dexpoten Plus.

Contraindications:

• Patients with liver disease or asthmatic patients.
• Patients taking monoamine oxidase (MAO) inhibitors or within 2 weeks of stopping such treatment.
• Known hypersensitivity to phenylephrine hydrochloride, dextromethorphan hydrobromide, or any component.
• During acute attacks of asthma.
• Patients with severe hypertension or severe coronary artery disease.

Side Effects:

• May cause drowsiness, dottiness, and constipation.
• Other side effects: GIT discomfort.
• No apparent evidence of physical dependence of the morphine type.
• Less common side effects: transient hypertension, dry mouth, restlessness, palpitations, allergic reactions (rashes, tightness of chest), thickening of bronchial secretions, toxic psychosis, and blood dyscrasia.

Pregnancy & Lactation:

• As with any other drugs, use during pregnancy and lactation is best avoided.

Precautions & Warnings:

• Drowsiness: May cause drowsiness. If affected, do not drive motor vehicles or operate machinery.
• Alcohol: Avoid alcoholic drinks while on this medication.
• Use with Caution: In patients with:
  • Epilepsy
  • Prostatic hypertrophy
  • Glaucoma
  • Hepatic disease
  • Hypertension
  • Heart disease
  • Diabetes
  • Hyperthyroidism
  • Stenosing peptic ulcer
  • Pyloro-duodenal obstruction
  • Bladder neck obstruction
  • Use in these cases only under medical advice and supervision.
• Consult Physician: If symptoms do not improve within one week or are accompanied by a high fever, consult a physician before continuing use.

Drug Interactions:

• Serious/Fatal Interaction: Avoid taking certain MAO inhibitors (e.g., isocarboxazid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, or tranylcypromine) during treatment and for two weeks before.
• Caution with:
  • Antihistamines applied to the skin (e.g., diphenhydramine cream).
  • Antispasmodics (e.g., atropine, belladonna alkaloids).
  • Beta blockers (e.g., metoprolol, atenolol).
  • Guanethidine.
  • Certain inhaled anesthetics (e.g., halothane).
  • Methyldopa.
  • Reserpine.
  • Scopolamine.
  • Tricyclic antidepressants (e.g., amitriptyline, desipramine).
  • Anti-seizure drugs (e.g., carbamazepine).
  • Medicines for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem).
  • Muscle relaxants.
  • Narcotic pain relievers (e.g., codeine).
  • Psychiatric medicines (e.g., chlorpromazine, risperidone, amitriptyline, trazodone).

Overdose Effects

Hospital admission is strongly advised in cases of overdosage.

• Symptoms of overdosage: Respiratory depression, paranoid psychosis, delusions, hallucinations, and convulsions.
• Treatment:
  • Empty the stomach by aspiration or gastric lavage.
  • Nervous stimulation and convulsions should be treated with a sedative such as intramuscular diazepam.
  • If marked excitation is present, a sedative like diazepam or a short-acting barbiturate may be given.
• Phenylephrine overdosage: May cause hypertension and associated reflex bradycardia.
  • Treatment for phenylephrine effects: Early gastric lavage, symptomatic and supportive measures.
  • Hypertensive effects may be treated with an alpha-receptor blocking agent (e.g., phentolamine mesylate 6-10 mg IV).
  • Bradycardia treated with atropine, preferably after blood pressure is controlled.

Storage Conditions

Keep out of the reach of children. Keep in a cool & dry place. Protect from light.