Active Ingredients & Mechanism of Action
(Based on the standard Torex syrup formulation):
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Diphenhydramine Hydrochloride (≈ 12.5 mg per dose): A first-generation antihistamine that suppresses cough reflex and reduces sneezing and throat irritation.
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Ammonium Chloride (≈ 125 mg): Expectorant that thins mucous, helping ease clearance of chest congestion.
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Terpin Hydrate (≈ 7.5 mg): Loosens thick phlegm and promotes mucus flow.
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Sodium Citrate (≈ 55–60 mg): A mucolytic agent that breaks down mucus, making coughs more effective.
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Menthol (in selected variants): Provides a cooling sensation and acts as a mild penetration enhancer.
Together in capsule form, they work synergistically to reduce cough reflex, thin mucus, and improve phlegm expulsion.
Primary Uses & Benefits
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Effective against wet/productive cough with thick mucus.
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Reduces throat irritation and allergic sneezing, aiding ease of breathing.
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Helps in post-surgical, smoker’s, or chronic coughs with enhanced expectoration.
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Convenient capsule form for adults or older children who cannot take syrup.
Dosage & How to Use
| User Group | Dose (Adult) | Timing |
|---|---|---|
| Adults (>12 years) | 1 capsule, 3× daily after food | Every 6–8 hours |
| Older children (≤12 yrs) | Use only under medical supervision | Lower dose or syrup recommended |
| Total duration | Usually up to 7 days initially | Longer only if prescribed |
Source: OraInTrip meds database lists “Capsule: Adults: 1 cap 3 times daily” for Torex SF (capsule form)
Possible Side Effects & Precautions
| Common, usually mild | Less common / serious |
|---|---|
| Sleepiness/drowsiness, dizziness, fatigue | Blurred vision, tremor, agitation, dry mouth, constipation |
| Mild nausea or upset stomach | Hypersensitivity reactions, sometimes cutaneous rash or hives |
| Temporary thickening of respiratory secretions | CNS effects in elderly—avoid long-term use due to cholinergic risk |
Precautions:
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Do not use with alcohol or sedatives — additive CNS depressant effect. [1mg]
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Contraindicated with MAO inhibitors (or within 14 days of stopping), severe urinary retention, narrow-angle glaucoma, respiratory depression, and certain cardiac or psychiatric conditions. [
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Not recommended during pregnancy or while breastfeeding without a physician’s order.
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Used with caution in older adults, due to fall risk and anticholinergic load.
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Monitor electrolyte status in long-term use, given urinary excretion of citrate/sodium.
When to Avoid or Stop
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If cough persists beyond 7 days, or is accompanied by fever, rash, chest pain, or shortness of breath, discontinue and consult a healthcare professional.
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Not a substitute for antibiotics if cough is due to bacterial infection; especially not for tuberculosis.
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Avoid in children under 6, or infants — syrup is preferred with pediatric guidance.
Storage & Additional Instructions
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Store in a cool, dry place away from children, ideally below 25–30 °C.
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Avoid sharing capsules with others or using multiple doses to compensate for missed ones.
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Always take with enough water and respect recommended dose guidelines—especially in case of kidney or liver impairment.
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