Important First Step: Find the Cause

• Post-nasal drip (allergic rhinitis, sinusitis) - the most common cause
• Asthma or cough-variant asthma
• Gastroesophageal reflux (GERD) - acid reflux irritating the throat
• ACE inhibitor use (a blood pressure medication - if taken, this is a known cause)
• Eosinophilic bronchitis

Cough Syrups / Medications for Dry Cough

1. Dextromethorphan (DXM) - Best OTC Option

• Examples: Robitussin DM, Benylin Dry Cough, Delsym (extended-release)
• How it works: Suppresses the cough center in the brain (central antitussive). Blocks NMDA receptors.
• Effectiveness: As effective as codeine for suppressing chronic cough in adults, with a much better safety profile.
• Side effects at normal doses: Minimal. At high doses - dizziness, nausea, headache. Do NOT abuse (it is sometimes misused recreationally).
• Best for: Dry, irritating, non-productive cough.
• (Murray & Nadel's Textbook of Respiratory Medicine)

2. Codeine-containing Syrups - Prescription-level, Short-term Use Only

• Examples: Phensedyl, Cofsils Cough Syrup (in some countries), Corex (where available)
• How it works: Central cough suppression.
• Caution: Addictive potential, constipation, sedation. Should be used only under a doctor's guidance and for short periods.
• (Lippincott Illustrated Reviews: Pharmacology)

3. Benzonatate (Tessalon) - Prescription

• How it works: Numbs the stretch receptors in the airway - a peripheral antitussive.
• Good option when central agents are not suitable.
• Must be swallowed whole (never chewed - causes mouth numbness).

For Chronic Cough Specifically (Beyond Syrups)

Practical Recommendation

1. Start with Dextromethorphan syrup (Delsym or Robitussin DM) for symptom relief - this is the safest and most evidence-based OTC choice.
2. See a doctor - 8+ weeks of dry cough needs investigation. A simple test can identify if it's reflux, allergy, or asthma.
3. Avoid syrups with alcohol or unnecessary combinations (many OTC "cough syrups" have sedating antihistamines that may not help a dry cough).
4. Do not use guaifenesin (expectorant) - that is for wet/productive cough, not dry cough.

Disclaimer: This is general health information, not a prescription. Please consult a doctor or pharmacist before starting any medication, especially for a cough lasting more than 8 weeks.

Top Picks for Dry Cough - India

🥇 1. Benadryl DR Syrup (Johnson & Johnson / Kenvue)

• Active ingredient: Dextromethorphan hydrobromide
• Why it's best: Specifically formulated for dry cough only (the "DR" stands for Dry). Directly suppresses the cough reflex in the brain.
• Dose: 10 ml every 6-8 hours for adults
• Available at: All pharmacies, Apollo Pharmacy, 1mg, Netmeds
• Price: ~₹80-100 for 100 ml
• Best OTC choice for dry chronic cough

🥈 2. Coflax Cough Syrup (Mankind Pharma)

• Active ingredient: Dextromethorphan + Phenylephrine
• Why: Good for dry cough, especially nighttime cough
• Extra benefit: Also helps if there's nasal congestion alongside the cough

🥉 3. Himalaya Koflet Syrup (Himalaya Drug Company)

• Active ingredient: Herbal blend (Tulsi, Licorice, Vasaka, Honey)
• Why: Safe for long-term use, no sedation, no addiction risk
• Best for: If you prefer a natural/herbal option for chronic cough
• Price: ~₹90-110 for 100 ml

4. Codistar DC Syrup (FDC Limited) - Ask pharmacist/doctor

• Active ingredients: Dextromethorphan + Chlorpheniramine + Phenylephrine
• Why: Good if dry cough is linked to allergies or post-nasal drip
• Note: Contains antihistamine - may cause slight drowsiness

Quick Decision Guide

Important Notes

• Benadryl DR is the top recommendation - it's the most widely available, affordable, and evidence-based OTC syrup for dry cough in India.
• Since your cough is chronic (more than 8 weeks), any syrup gives only temporary relief. Please see a doctor - a 5-minute consultation can identify if it's due to acidity, allergy, or asthma, which can then be properly treated.
• Avoid: Benadryl CR (that is for wet cough), Ascoril (for productive/wet cough with mucus), or any syrup with only guaifenesin (expectorant - not suitable for dry cough).

Disclaimer: Please consult a doctor or pharmacist before purchasing, especially since your cough has been chronic.