cadex syrup - Bromhexine (NA) + Dextromethorphan Hydrobromide (NA) medicine

aa ha syrup: Complete Medicine Guide

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🏭 Zydus Healthcare Limited 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 21, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Moderate for cough relief; limited for combination.
Reviewed by
SaathiMed Expert Panel | Oct 21, 2026
🩺
Medically Fact-Checked & Clinically Verified by SaathiMed Clinical Review Board
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026

When to Call Your Doctor IMMEDIATELY

  • Blood in sputum or vomit
  • Severe allergic reaction (swelling of face, lips, throat, difficulty breathing)
  • Chest pain or rapid heartbeat
  • Severe dizziness or fainting
  • Confusion or hallucinations
  • Yellowing of skin or eyes
  • Decreased urine output

If experiencing severe symptoms, call emergency services immediately.

What is cadex syrup used for?

This medicine is a combination cough syrup containing bromhexine (a mucolytic) and dextromethorphan (a cough suppressant). It is used for short-term relief of dry and irritating coughs. It should not be used in children under 12 years or with MAO inhibitors.

  • Generic Name: Bromhexine + Dextromethorphan Hydrobromide
  • Manufacturer: Zydus Healthcare Limited
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 cadex syrup के बारे में (Hindi Summary)

उपयोग: यह दवा ब्रोंकाइटिस और डेक्सट्रोमेथोर्फन का संयोजन है, जिसका उपयोग सूखी और खुजली वाली खांसी के इलाज के लिए किया जाता है। यह कफ को पतला करने और खांसी की प्रतिक्रिया को कम करने में मदद करती है। यह 12 वर्ष से अधिक उम्र के बच्चों और वयस्कों के लिए है। इसका उपयोग 7 दिनों से अधिक नहीं करना चाहिए।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में नींद आना, चक्कर आना, जी मिचलाना, पेट में परेशानी और सिरदर्द शामिल हैं। कभी-कभी एलर्जी, धड़कन तेज होना या सांस लेने में कठिनाई हो सकती है। गंभीर दुष्प्रभाव दुर्लभ हैं। यदि कोई गंभीर लक्षण दिखे तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को डॉक्टर के निर्देशानुसार ही लें। 7 दिनों से अधिक उपयोग न करें। नींद आने या चक्कर आने पर वाहन न चलाएं। शराब का सेवन न करें। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से सलाह लें। बच्चों को 12 वर्ष से कम उम्र में न दें। दवा को ठंडी और सूखी जगह पर रखें।

💡 Did You Know? Over 80% of the antiretroviral drugs used globally to combat AIDS are supplied by Indian pharmaceutical companies.

💊 cadex syrup Uses & Benefits

[{"condition":"Dry, irritating cough","description":"This medicine helps suppress the cough reflex and reduce throat irritation.","evidence":"Well-established"},{"condition":"Productive cough with thick mucus","description":"Bromhexine thins mucus while dextromethorphan reduces excessive coughing.","evidence":"Moderate"},{"condition":"Cough associated with common cold","description":"Provides symptomatic relief of cough due to upper respiratory tract infections.","evidence":"Moderate"}]

Off-label uses: []

Primary treatment for: Cough

Also treats: Common cold, Upper respiratory tract infection, Bronchitis

📋 Drug Information

Generic Name(s)Bromhexine + Dextromethorphan Hydrobromide
Brand NameAscodex Cough Syrup
ManufacturerZydus Healthcare Limited
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassRESPIRATORY
Action ClassMucolytic and Antitussive
Route of AdministrationOral
StorageStore at room temperature (15-30°C) in a dry place, away from direct sunlight and moisture. Keep out of reach of children.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine with food or milk to reduce stomach upset.
2
Stay well hydrated throughout the day to help thin mucus.
3
Avoid alcohol while taking this medicine as it increases drowsiness.
4
Do not take more than the prescribed dose.
5
Consult your doctor if symptoms persist beyond 7 days.
6
Report any unusual drowsiness, confusion, or allergic reactions immediately.
7
Do not use this medicine for chronic cough without medical supervision.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Dry cough
This medicine is commonly prescribed for this.
Likely Use
✅
Productive cough with thick mucus
This medicine helps thin mucus and suppress cough.
Likely Use
❌
Fever
This medicine is not a primary fever reducer.
Not Primary
❌
Chest pain
This medicine is not for chest pain; seek medical help.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionBromhexine is rapidly absorbed from the gastrointestinal tract after oral administration. Dextromethorphan is also well absorbed from the gastrointestinal tract. Peak plasma concentrations for both are reached within 2 to 3 hours.
DistributionBromhexine is widely distributed in body tissues, including the lungs. Dextromethorphan is distributed to the brain and other tissues. Both may cross the placenta and are excreted in breast milk.
Protein BindingBromhexine is approximately 95% bound to plasma proteins. Dextromethorphan is about 60-70% bound to plasma proteins.
MetabolismBromhexine undergoes extensive first-pass metabolism in the liver, primarily by CYP3A4, to active metabolites. Dextromethorphan is metabolized in the liver by CYP2D6 to dextrorphan, its active metabolite.
Half-LifeThe elimination half-life of bromhexine is approximately 6-8 hours. Dextromethorphan has a half-life of 2-4 hours.
ExcretionBromhexine and its metabolites are excreted mainly in the urine. Dextromethorphan and its metabolites are also excreted primarily in the urine.
BioavailabilityThe oral bioavailability of bromhexine is about 70-80% due to first-pass metabolism. Dextromethorphan has an oral bioavailability of approximately 10-20% due to extensive first-pass metabolism.
Onset of ActionCough suppression from dextromethorphan begins within 15-30 minutes after oral administration. Mucolytic effects of bromhexine may take a few hours to become noticeable.
Peak Plasma TimePeak plasma concentrations for both bromhexine and dextromethorphan are reached in about 2-3 hours.
Duration of ActionThe antitussive effect of dextromethorphan lasts for about 4-6 hours. The mucolytic effect of bromhexine lasts for about 6-8 hours.

How It Works

This medicine combines two active ingredients with different mechanisms. Bromhexine works by increasing the production of serous fluid in the respiratory tract and breaking down acidic mucopolysaccharide fibers in mucus, thereby reducing mucus viscosity and making it easier to expel. Dextromethorphan hydrobromide acts centrally on the cough center in the medulla oblongata, specifically at the sigma-1 receptor, to suppress the cough reflex. It does not have analgesic or addictive properties at therapeutic doses.

Mechanism Steps

1
Bromhexine breaks down mucus: Bromhexine hydrolyzes acidic mucopolysaccharide fibers in mucus, reducing its viscosity and making it less sticky.
2
Bromhexine increases serous fluid: It stimulates the serous cells of the bronchial glands to produce more watery fluid, further thinning mucus.
3
Dextromethorphan acts on the brain: Dextromethorphan binds to sigma-1 receptors in the medulla oblongata, suppressing the cough reflex.
4
Combined effect: The two actions together reduce cough frequency and make any mucus easier to cough out.

💡 How to Take cadex syrup

Strength: Each 5 ml of syrup contains bromhexine hydrochloride 4 mg and dextromethorphan hydrobromide 10 mg.

1Shake the bottle well before use.
2Use a measuring cup or spoon to measure the exact dose.
3Take the medicine orally, with or without food.
4If it upsets your stomach, take it with a meal or milk.
5Do not exceed the recommended dose.
6Wash the measuring cup after each use.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 10 ml (two teaspoons) taken orally every 6 to 8 hours, not exceeding 40 ml in 24 hours. However, the dose must be individualized by a qualified clinician based on the indication, age, weight, renal and hepatic function. Do not self-medicate. Follow your doctor's prescription exactly.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may be more sensitive to the side effects of this medicine, especially drowsiness and dizziness. Use with caution and consult a doctor for appropriate dosing.
Renal ImpairmentDose adjustment may be needed in patients with kidney disease. Consult a doctor.
Hepatic ImpairmentDose adjustment may be needed in patients with liver disease. Consult a doctor.
Maximum Daily Dose40 ml per day for adults, unless otherwise prescribed by a doctor.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
Take with meals
Reduces stomach upset.
Grapefruit
Avoid
May increase drug levels.
Alcohol
Avoid
Increases drowsiness and risk of respiratory depression.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of cadex syrup

✅ Common Side Effects

Drowsiness (Common (5-10%))
Avoid driving or operating machinery. Usually resolves on its own.
Dizziness (Common (5-10%))
Sit or lie down until it passes. Consult doctor if persistent.
Nausea (Common (5-10%))
Take with food or milk to reduce stomach upset.
Stomach discomfort (Common (5-10%))
Take with meals. Consult doctor if severe.
Headache (Common (5-10%))
Rest and stay hydrated. Consult doctor if severe or persistent.

🚨 Serious Side Effects

Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Seek immediate medical attention if you experience swelling of face, lips, throat, difficulty breathing, or rash.
Serotonin syndrome (Rare (<0.1%))
Seek immediate medical help if you have agitation, hallucinations, rapid heartbeat, fever, or muscle twitching.
Respiratory depression (Rare (<0.1%))
Get emergency help if you have slow or shallow breathing, extreme drowsiness, or confusion.

⚠️ Rare Side Effects

Hallucinations
Stop the medicine and consult a doctor immediately.
Severe skin reactions (Stevens-Johnson syndrome)
Seek emergency medical care if you develop rash, blisters, or peeling skin.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
MAO inhibitors Major
SSRIs Major
CYP2D6 inhibitors Major
CNS depressants Moderate
Anticholinergics Moderate
Guaifenesin Minor

🚨 Major Interactions

  • MAO inhibitors (e.g., phenelzine, tranylcypromine)
  • SSRIs (e.g., fluoxetine, sertraline)
  • CYP2D6 inhibitors (e.g., quinidine, paroxetine)

⚡ Moderate Interactions

  • CNS depressants (e.g., alcohol, benzodiazepines, opioids)
  • Anticholinergic drugs (e.g., antihistamines, tricyclic antidepressants)

🍷 Alcohol Interaction

Alcohol should be avoided while taking this medicine because it can increase drowsiness, dizziness, and the risk of respiratory depression. It may also worsen stomach irritation.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to bromhexine, dextromethorphan, or any component","Children under 12 years of age","Concurrent use with MAO inhibitors or within 14 days of stopping them","Respiratory depression","Chronic cough associated with smoking, asthma, or emphysema without medical supervision","Cough with excessive mucus production (unless directed by doctor)"]

⚠️ Warnings & Precautions

["Do not exceed the recommended dose.","Avoid driving or operating machinery if drowsy.","Avoid alcohol.","Consult doctor if cough persists more than 7 days, or is accompanied by fever, rash, or persistent headache.","Use with caution in liver or kidney disease.","Do not use in children under 12 years.","Pregnant or breastfeeding women should consult a doctor before use."]

🤱 Lactation Safety

Not established from the available information. Consult your doctor before use.

💊 Overdose Management

Overdose may cause severe drowsiness, dizziness, nausea, vomiting, hallucinations, rapid heartbeat, and respiratory depression. Seek immediate medical attention. Treatment is supportive and symptomatic. There is no specific antidote. Gastric lavage may be considered if within 1-2 hours of ingestion. Monitor vital signs and provide supportive care.

⏰ Missed Dose

If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose to catch up.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor. Do not use it for more than 7 days without medical advice. Avoid driving or operating heavy machinery if you feel drowsy or dizzy. Do not drink alcohol while taking this medicine, as it can increase drowsiness and other side effects. Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding. Do not take this medicine with MAO inhibitors or within 14 days of stopping them. Keep out of reach of children. If you have liver or kidney problems, consult your doctor before use. Do not use this medicine to treat a chronic cough or a cough with a lot of mucus without medical supervision. Store at room temperature, away from direct sunlight and moisture.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more sensitive to drowsiness and dizziness. Use with caution and monitor for falls.

🤰 Pregnancy Planning (TTC)

Consult your doctor before taking this medicine if you are pregnant or planning to become pregnant. Safety is not established.

🏥 Post-Surgery Considerations

Consult your doctor before use after surgery, as cough suppression may be undesirable if you need to clear secretions.

🦷 Dental Procedures

Inform your dentist if you are taking this medicine, as it may cause dry mouth.

💚 Lifestyle Tips for Better Results

🏃
Stay well hydrated to help thin mucus.
🥗
Use a humidifier to keep air moist.
😴
Avoid smoking and exposure to smoke.
💧
Get plenty of rest to aid recovery.
🧘
Gargle with warm salt water to soothe throat.
🌞
Avoid cold drinks and ice cream.

🏋️ Exercise Considerations

Avoid strenuous exercise if you feel drowsy or dizzy. Light activity is fine if you feel up to it.

🥗 Diet Recommendations

Drink warm fluids like soups and herbal tea.
Include honey and ginger to soothe throat.
Avoid cold and processed foods.
Eat light, easily digestible meals.

💼 Impact on Daily Work & Life

This medicine may cause drowsiness, affecting your ability to drive or operate machinery. Avoid these activities until you know how it affects you. It is best to rest and recover.

🛑 When to Stop This Medicine

Stop taking this medicine if your cough resolves or if you experience any serious side effects. Do not stop abruptly if you have been taking it for a long time without consulting your doctor.

📅 Long-Term Use Effects

Long-term use of this medicine is not recommended. Prolonged use of dextromethorphan can lead to dependence and tolerance. Bromhexine is generally safe for short-term use. If cough persists beyond 7 days, consult a doctor to rule out underlying conditions.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Steam inhalation

Helps loosen mucus and soothe airways.

Evidence: Well-established
Honey and warm fluids

Soothes throat and reduces cough.

Evidence: Moderate

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific interaction with vaccines. However, if you have a cough and fever, consult a doctor before vaccination.

📦 Storage Guide

✅ DO

Store at room temperature (15-30°C)

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight

❌ DON'T

Do not store in bathroom cabinet

✈️ Traveling with This Medicine

When traveling, carry this medicine in its original packaging with a copy of your prescription. Store it at room temperature and protect it from direct sunlight. If crossing time zones, adjust dosing intervals as advised by your doctor. Check customs regulations for carrying medicines. Keep it in your carry-on luggage if flying.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 35-year-old woman with a dry cough for 5 days
She was prescribed this medicine twice daily. After 2 days, her cough reduced significantly. She experienced mild drowsiness, so she avoided driving. She completed the 5-day course and recovered fully.
💡 Lesson: Taking the medicine as prescribed and avoiding driving when drowsy ensures safety and effectiveness.
👤 A 50-year-old man with a productive cough and thick mucus
He was given this medicine for 7 days. His mucus became thinner and easier to cough out. He also drank plenty of water as advised. He did not experience any serious side effects.
💡 Lesson: Staying hydrated enhances the mucolytic effect and helps in faster recovery.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: Cough suppression begins within 15-30 minutes, while mucus thinning may take a few hours.

Q: Can I take it with other cold medicines?

A: Consult your doctor before combining with other cough and cold medicines to avoid overlapping ingredients.

Q: Is it safe for diabetics?

A: This syrup may contain sugar. Diabetics should check the label or consult a doctor for sugar-free alternatives.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my kidney function?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?

🔄 Substitutes for cadex syrup

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine can cure any type of cough.
    Fact: It is only for symptomatic relief of dry or mildly productive coughs and does not treat the underlying cause.
  • Myth: It is safe for children under 12.
    Fact: It is not recommended for children under 12 years due to safety concerns.
  • Myth: You can take it with alcohol.
    Fact: Alcohol increases drowsiness and risk of respiratory depression and should be avoided.

🔄 Alternative Options

Generic Alternatives

  • Bromhexine + Dextromethorphan syrup (various manufacturers)

Brand Alternatives

  • Not established from the available information.

📊 Comparison with Similar Medicines

[{"medicine":"This medicine","composition":"Bromhexine + Dextromethorphan","primary_use":"Dry and productive cough","sedation":"Moderate"},{"medicine":"Dextromethorphan alone","composition":"Dextromethorphan","primary_use":"Dry cough","sedation":"Low"},{"medicine":"Bromhexine alone","composition":"Bromhexine","primary_use":"Productive cough","sedation":"None"}]

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