# Dextromethorphan in Nigeria

- Source: https://ogbogwu.com/drugs/dextromethorphan/
- Drug class: Cough suppressant (antitussive) (Cough, Cold & Flu)
- Also known as: DXM, Benylin Dry Cough, Tutolin
- Prescription required: no
- Last updated: July 2026

## Price in Nigeria

Dextromethorphan prices in Nigeria vary by brand, strength, and where you buy it. Confirm the current price with a licensed pharmacy, and always check the product is NAFDAC-registered before you pay.

## What is Dextromethorphan?

Dextromethorphan, often shortened to DXM, is a cough suppressant used for a dry, tickly cough — the kind that produces no phlegm and often gets worse at night. It is one of the standard active ingredients in the 'dry cough' cough syrups on sale across Nigeria, including brands such as Benylin Dry Cough and Robitussin Dry Cough, as well as many combination cold-and-flu products.

Dextromethorphan works on the cough centre in the brain, calming the reflex that makes you cough. This is helpful when a cough is dry and irritating and serves no useful purpose — for example, an annoying cough that keeps you awake. It is the opposite of an expectorant like guaifenesin: dextromethorphan quietens the cough, while an expectorant helps bring mucus up. Using dextromethorphan on a chesty, productive cough is not advisable, because suppressing that cough can trap mucus on the chest.

At the normal recommended doses, dextromethorphan is safe and available without a prescription. It is important to respect the dose, however: taken in large amounts far above the recommended limit, dextromethorphan can cause dangerous effects and is sometimes misused for that reason. Used sensibly and briefly for a dry cough, it is a well-established, effective medicine. As with all cough syrups in Nigeria, check for a NAFDAC registration number before buying.

## What is Dextromethorphan used for?

- Relieving a dry, tickly, non-productive cough
- Calming a night-time cough that interferes with sleep
- Short-term relief of an irritating cough during a cold or flu
- Symptom relief as part of combination cold-and-flu remedies
- Soothing throat-tickle coughs where there is no mucus to clear

## Dosage

Always follow a doctor's or pharmacist's instructions; this is general reference information.

- Adults: For a typical 15mg/5ml syrup, the usual adult dose is 10ml (30mg) three to four times a day, or as directed on the pack; do not exceed the maximum stated on the label. Strengths differ between products, so always follow the specific product's instructions and never take more than the label allows.
- Children: Doses depend on age and product strength — follow the label or a pharmacist's advice. Dextromethorphan-containing cough medicines are generally not recommended for children under 6 years, and should be used cautiously in older children. Do not give an adult cough syrup to a young child by guessing the dose.
- Elderly: Standard adult doses are usually appropriate. Older adults on several medicines, particularly certain antidepressants, should check with a pharmacist before use.

Dextromethorphan is for short-term relief of a dry cough, not for a chesty cough or a cough that has lasted for weeks. Never exceed the recommended dose — taking large amounts is dangerous, not more effective. Read labels on combination products carefully; many also contain paracetamol, and doubling up on paracetamol across different medicines can cause serious harm.

## Side effects

Common: Drowsiness or dizziness; Nausea or mild stomach upset; Tiredness; Occasionally restlessness or difficulty sleeping.

Serious (seek medical help immediately): Confusion, hallucinations, agitation, or a fast heartbeat — usually only at doses far above the recommended limit; Rash, itching, or swelling of the face, lips, or throat — possible allergic reaction; seek emergency care; Signs of serotonin syndrome (agitation, sweating, tremor, rapid heartbeat) if taken with certain antidepressants.

When to see a doctor: See a doctor if your cough lasts more than 2-3 weeks, keeps returning, or comes with a high fever, breathlessness, chest pain, or blood in the phlegm. Stop the medicine and seek urgent help if you develop swelling, difficulty breathing, confusion, or a rapid heartbeat. If a cough is chesty and bringing up phlegm, a suppressant like dextromethorphan is the wrong choice — speak to a pharmacist about an expectorant instead.

## Warnings

Do not take if: Do not use if you are allergic to dextromethorphan; Do not take with, or within two weeks of stopping, MAOI antidepressants — this combination can be dangerous; Avoid in children under 6 years unless advised by a doctor; Do not use for a chesty, productive cough without medical advice, as suppressing it can trap mucus; Do not exceed the recommended dose — high doses are unsafe and dextromethorphan is sometimes misused.

Interactions: MAOI antidepressants — must not be combined; risk of a serious reaction; SSRIs and other serotonergic antidepressants — combining can raise the risk of serotonin syndrome; Alcohol and other sedatives increase drowsiness; Combination cold-and-flu products often contain paracetamol — avoid taking extra paracetamol-containing medicines at the same time; Some medicines that affect liver enzymes can raise dextromethorphan levels.

Pregnancy & breastfeeding: Dextromethorphan is best avoided in pregnancy unless clearly necessary, particularly in the first trimester, and only after advice from a doctor or pharmacist. Non-drug measures — warm fluids, honey, rest, steam inhalation — are safer first steps for a cough in pregnancy. Small amounts may pass into breast milk; check with a pharmacist before use while breastfeeding, and prefer single-ingredient products over combinations.

## Brands in Nigeria

Well-known NAFDAC-registered brands: Benylin Dry Cough (Kenvue, made in United Kingdom); Robitussin Dry Cough (Haleon, made in United Kingdom).
Full searchable brand list: https://ogbogwu.com/drugs/dextromethorphan/brands/

## How to verify it is genuine

1. Check the NAFDAC registration number on the pack — genuine cough syrups sold in Nigeria must carry a valid NAFDAC number
2. Verify the NAFDAC number using the NAFDAC Green Book or the NAFDAC mobile app, especially for imported brands like Benylin and Robitussin
3. Buy from licensed pharmacies and registered stores rather than roadside sellers, as cough syrups are commonly counterfeited
4. Check the expiry date and that the seal, cap, and carton are intact and untampered
5. Genuine syrup should be the expected colour and consistency with no unusual smell; discard anything that looks or smells wrong
6. Avoid any cough syrup that claims to contain codeine — codeine-containing cough syrups are banned in Nigeria and illegal to sell

Verify any NAFDAC number free (no login): https://ogbogwu.com/nafdac-checker/

## FAQs

### Is dextromethorphan for a dry cough or a chesty cough?

Dextromethorphan is for a dry, tickly cough that produces no phlegm — it calms the cough reflex so an irritating, unproductive cough settles, which is especially useful at night. It is not the right medicine for a chesty, productive cough where you can feel mucus, because suppressing that kind of cough can trap phlegm on the chest. For a chesty cough, an expectorant such as guaifenesin, or a mucolytic like bromhexine or ambroxol, is more appropriate. If you are unsure which type of cough you have, ask a pharmacist.

### Is dextromethorphan safe? I heard it can be misused.

At the normal recommended doses used for a cough, dextromethorphan is safe and effective, which is why it is sold without a prescription. The concern you have heard about relates to people deliberately taking very large amounts — far above the recommended dose — to feel intoxicated, which is dangerous and can cause confusion, hallucinations, a racing heart, and other serious effects. The message is simple: use it only for a genuine dry cough, follow the dose on the label, and never take more than instructed. Keep cough syrups out of the reach of teenagers and store them safely.

### Can I take dextromethorphan with paracetamol or a cold medicine?

You can, but you must check the labels first. Many cold-and-flu products already combine dextromethorphan with paracetamol and sometimes an antihistamine or decongestant. If you then take a separate paracetamol tablet on top of a combination syrup that already contains it, you risk a paracetamol overdose, which can seriously damage the liver. The safe approach is to read every label, avoid taking two products with the same ingredient, and ask a pharmacist if you are unsure what a product contains.

## Sources

- NAFDAC Greenbook (official register of approved products in Nigeria)
- British National Formulary (BNF)
- Nigerian Standard Treatment Guidelines (Federal Ministry of Health)