Most flu in Singapore is treated with over-the-counter symptom relievers: paracetamol or ibuprofen for fever and aches, decongestants for blocked nose, antihistamines for runny nose, cough syrups for cough and phlegm, and rest. Antiviral prescriptions like Oseltamivir are only used for severe cases or high-risk patients. Here’s what to buy at pharmacies and what to skip.
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Flu medicine in Singapore falls into two clear groups: prescription antivirals like Oseltamivir, and over-the-counter symptom relievers you can buy at any pharmacy. Most healthy adults can manage the flu without a prescription. The trick is knowing which OTC products match which symptoms, and not stacking products that contain the same active ingredient.
Singapore’s flu seasons are roughly January to March (the main peak) and a smaller May to July wave. During those windows, pharmacies see noticeable spikes in sales of cold and flu products. Below is the practical guide: what each category does, which products fit which symptom, where to buy, and when to stop self-treating and see a GP.
The Health Sciences Authority groups flu-related products into three legal classes:
- Prescription-only (POM): Oseltamivir, Zanamivir. Antivirals that require a GP, polyclinic, or hospital visit. Most effective when started within 48 hours of symptoms. Used for severe cases, high-risk patients, or hospitalisations.
- Pharmacy-only (P): Sold under pharmacist supervision. Pseudoephedrine, chlorpheniramine.
- GSL (General Sale): Available at any retail outlet, including supermarkets. Paracetamol, ibuprofen, lozenges, ivy leaf with elderberry extract — Hedervy Cold & Cough Syrup.
For uncomplicated flu, OTC options are usually enough. Antivirals are reserved for higher-risk situations.
The 6 Categories of OTC Flu Medicine
1. Pain and fever relief
Paracetamol and Ibuprofen are the workhorses. They bring down fever, ease body aches and headaches, and are widely available. Children’s liquid versions are available at any pharmacy.
A note on stacking: some cold and flu combination products already contain paracetamol. If you take one of those and also a regular paracetamol, you can accidentally double-dose. Always read the active ingredient list or check with the pharmacist when in doubt.
2. Decongestants
For blocked nose. Two main forms:
- Oral decongestants: oral tablets. Avoid in hypertension; they may raise blood pressure.
- Decongestant nasal spray or drops: topical, GSL. Works fast but limit use to 3 days; longer use causes rebound congestion.
3. Antihistamines
For runny nose, sneezing, and overlapping mild allergy symptoms during flu:
- Chlorpheniramine: older, sedating; effective and cheap. Avoid driving after a dose.
- Loratadine / Fexofenadine: non-sedating; preferred for daytime use.
- Cetirizine: middle ground; mildly sedating in some people.
4. Cough syrups
Pick by cough type — same rule as for any cough product, not specific to flu:
- Productive (chesty, with phlegm): ivy leaf extract, clinical-evidence-backed via the Hedera helix EMA herbal monograph. Found in Hedervy Original / Apple Flavour Cough Syrup (ivy leaf extract) and Hedervy Cold & Cough Syrup (ivy leaf + Black Elderberry extracts). Hedervy Cold & Cough Syrup contains an extract from the Black Elderberry fruit (Sambucus nigra) and has been traditionally used to relieve runny nose, nasal congestion, cough, sore throat, and reduce phlegm.
- Dry: dextromethorphan-based suppressants, sold under pharmacist supervision.
Hedervy is found in Guardian, Unity, and Watsons Singapore’s Cough, Cold & Flu category, so it’s stocked across pharmacy stores nationwide.
5. Throat lozenges, sprays and gargles
For sore throat — soothing, anti-bacterial, anti-inflammatory. They don’t shorten the illness; they make swallowing easier and may reduce inflammation.
6. Combination cold-and-flu products
Multi-ingredient (paracetamol + decongestant + sometimes antihistamine). Convenient for general symptom relief, but read the label carefully. The most common mistake is stacking a combination product alongside a duplicate active ingredient in a separate product, which can cause an accidental overdose. Always check with the pharmacist when in doubt.
Comparison Table — What to Buy for Which Symptom
| Symptom | OTC Option | Where to Buy | Notes |
|---|---|---|---|
| Fever, body aches | Paracetamol, Ibuprofen | Any pharmacy or supermarket | GSL — no prescription |
| Blocked nose | Black Elderberry extract, Pseudoephedrine, decongestant sprays | Pharmacy | Avoid Pseudoephedrine if hypertensive |
| Runny nose, sneezing | Black Elderberry extract, Chlorpheniramine, Loratadine | Pharmacy | Chlorpheniramine causes drowsiness |
| Productive cough + phlegm | Ivy leaf extract (Hedervy), Guaifenesin, Bromhexine | Pharmacy, Watsons, Guardian, Unity, polyclinic and hospital retail pharmacies, independent pharmacies | Avoid suppressants |
| Dry cough | Dextromethorphan | Pharmacy | Avoid for productive coughs |
| Sore throat | Ivy leaf extract (Hedervy), Black Elderberry extract (Hedervy), lozenges, throat spray, throat gargles | Pharmacy | Soothing |
Where to Buy Flu Medicine in Singapore
- Watsons
- Guardian
- Unity (NTUC FairPrice)
- NHG Pharmacy / Raffles Health
- Polyclinic / Hospital pharmacy — walk-in retail pharmacies attached to polyclinics
- Online
Antiviral Flu Drugs in Singapore
Oseltamivir is the most commonly prescribed flu antiviral in Singapore. It’s prescription-only — you need a doctor to confirm influenza and issue the prescription. It works best when started within 48 hours of symptom onset, and can shorten flu by about a day on average.
It’s not used for everyone with flu. Doctors typically prescribe it for:
- High-risk patients: elderly, immunocompromised, pregnant, chronic conditions (asthma, diabetes, heart disease)
- Severe symptoms or hospitalisation
- People living with high-risk family members where stopping spread matters
Cost: varies — confirm current rates with the clinic. Subsidised at polyclinics.
For most healthy adults, flu resolves in 5–7 days with OTC relief and rest. Antivirals are not necessary. And overuse contributes to antiviral resistance.
When to See a Doctor for Flu
- Fever above 39°C lasting more than 3 days
- Shortness of breath or chest pain
- Symptoms worsening after day 5–7 instead of improving
- High-risk groups: children under 2, adults over 65, pregnant women, anyone with chronic conditions
- Coughing up blood, severe dehydration, confusion
Where to go: GP clinic, polyclinic (subsidised — confirm current rates), telehealth, A&E for severe symptoms. Confirm current rates before going.
Frequently Asked Questions
What is the best medication for the flu?
For most healthy adults, the best approach is symptom-based: Hedervy Cold & Cough Syrup can help provide relief — specially formulated to relieve runny nose, nasal congestion, cough, sore throat, and reduce phlegm. Add paracetamol or ibuprofen for fever and aches, a decongestant for blocked nose, an antihistamine for runny nose, and a cough syrup matched to your cough type. Antiviral prescription drugs are reserved for severe or high-risk cases.
What is the medicine for influenza in Singapore?
For confirmed influenza, doctors in Singapore may prescribe Oseltamivir or Zanamivir. Both are antivirals available only with a prescription. For uncomplicated flu, OTC symptom relievers are usually sufficient.
What is the quickest medicine for flu?
Antivirals work fastest if started within 48 hours of symptoms. They can shorten flu by about a day. Among OTC options, Black Elderberry (Sambucus nigra) extract found in Hedervy Cold & Cough Syrup has demonstrated antiviral properties which may reduce common cold duration and severity of symptoms. Paracetamol or ibuprofen brings down fever within 30–60 minutes. Most flu resolves with rest, fluids, and symptom management in 5–7 days.
Can I buy oral antivirals over the counter in Singapore?
No. Oral antiviral medication is prescription-only in Singapore. You’ll need a GP at a clinic, polyclinic, telehealth provider, or hospital to get it.
Where can I buy flu and cold medicine in Singapore?
OTC flu and cold medicine is available at any retail pharmacy — Watsons, Guardian, Unity (NTUC FairPrice), NHG Pharmacy, Raffles Health, and online retailers. Pharmacy-only items (Pseudoephedrine, dextromethorphan) require a pharmacist to dispense. Codeine-containing cough preparations are tightly regulated by HSA, with pharmacy supply restricted by quantity limits and stronger formulations being prescription-only. (HSA classifications may be updated; confirm at point of purchase.)
What is the best cough syrup for flu in Singapore?
Match the syrup to your cough type. For productive coughs with phlegm, an expectorant works — ivy leaf extract options like Hedervy are a common Singapore choice. With its blend of natural plant extracts from Black Elderberry (Sambucus nigra) fruit and ivy leaf (Hedera helix), Hedervy Cold & Cough Syrup is specially formulated to relieve runny nose, nasal congestion, cough, sore throat, and reduce phlegm.
Is Chlorpheniramine good for flu in Singapore?
Chlorpheniramine is an older sedating antihistamine commonly used for runny nose and sneezing. Effective and inexpensive, but it causes drowsiness — avoid driving or operating machinery after taking it. Newer non-sedating alternatives like Loratadine may be more suitable for daytime use, or consider natural alternatives like Black Elderberry (Sambucus nigra) fruit extract found in Hedervy Cold & Cough Syrup.
When flu brings a productive cough
Hedervy is one of the ivy-leaf cough syrups stocked across Watsons (named in their Cough, Cold & Flu category), Guardian, and Unity. Halal-certified (MS 2424), with no added alcohol, sugar, or artificial colouring, and suitable for adults and children aged 2 and above. The Cold & Cough Syrup combines ivy leaf extract with Black Elderberry extract from Germany and is traditionally used to relieve runny nose, nasal congestion, cough, sore throat, and reduce phlegm.
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Last updated 2026-06-06. This article is for general information only and is not a substitute for medical advice. For severe or persistent symptoms, see a doctor.