WhichMedicine?

Independent, plain-English guidance on over-the-counter medicines — made in Australia.

mailhello@whichmedicine.com.auplaceMade in Australia
Categories
Pain reliefCough, cold & fluAllergy & hayfeverDigestive healthSkin, wound & sun careAll categories →
Popular guides
Best paracetamolParacetamol vs ibuprofenBest antihistamineSleep aidsBest medicine for cold
Company
About usContact usSymptom checkerBrowse symptoms
Legal
Privacy policyTerms & conditionsMedical disclaimerEditorial policy
© 2026 WhichMedicine. Information only — not a substitute for professional medical advice.Sources:TGA·Healthdirect·PSA
WhichMedicine?
stethoscopeSymptom checker
Pain reliefexpand_moreCold & fluexpand_moreAllergyexpand_moreDigestiveexpand_moreSkin & sunexpand_moreEye & earexpand_moreVitaminsexpand_moreFamilyexpand_moreSleep & stressexpand_more
WhichMedicine?
Homechevron_rightRunny Nose
Condition guide

Runny Nose

Constant dripping or runny nose? Stop the drip with the right antihistamines or decongestants.

stethoscopeFind the right medicine
summarizeTreatment and relief options
  • check_circleAntihistamines (cetirizine/loratadine) for allergic runny nose
  • check_circleDecongestant sprays (oxymetazoline) for short term relief
  • check_circleSaline nasal rinse to clear mucus
  • check_circleSteam inhalation
  • check_circleStay hydrated
emergency_homeWhen to get help
  • chevron_rightFluid or blood leaking from the nose after a head injury: call Triple Zero (000)
  • chevron_rightUnilateral (one side) foul smelling discharge in child (foreign body)
  • chevron_rightSevere sinus pain and fever
  • chevron_rightBloody discharge lasting >1 week
  • chevron_rightVisual changes
lightbulb

Good to know

What the colour and the side tell you

Clear mucus can come from an irritated nose, but it doesn't rule out an infection. Green or yellow mucus shows that white blood cells have been fighting an infection, but antibiotics are rarely needed for a runny nose. See a doctor if only one nostril runs, as something may be stuck in it. Fluid or blood leaking from the nose after a head injury needs Triple Zero (000). Sneezing with itchy eyes points to hay fever or sneezing; a sore throat and aches to cold and flu; and pain in your face to sinus pain.

Medicines that help, and some that cause it

Some medicines, including anti-inflammatories, ACE inhibitors and some diuretics, can cause a runny nose. Decongestants can help a runny nose from a cold, but using them for more than a few days at a time can make symptoms worse. Antihistamines alone aren't effective for a cold but can ease allergy symptoms. A saltwater rinse can wash out mucus and allergens. Mucus running down the back of your throat (post-nasal drip) can cause a cough. See your doctor if a runny nose isn't improving, gets worse or comes with a high fever.

Sources: healthdirect — Runny nose; healthdirect — Medicines for colds, flu (influenza) and COVID-19; healthdirect — Hay fever (allergic rhinitis)

Frequently asked questions

Colds, flu, allergies (hay fever), or cold weather. It's your body flushing out irritants.

Related conditions
Blocked NoseCold & FluHay FeverSneezing
menu_book

Best of & comparisons

Allergy & hayfever13 min read

Hayfever or Cold? How to Tell the Difference in Australia

Sneezing non-stop but not sure why? We compare hayfever and cold symptoms side by side, with a quick checklist and the best OTC options available in Australia.

Allergy & hayfever8 min read

Antihistamines in Australia: Zyrtec, Telfast and Claratyne Compared

Compare antihistamine ingredients, drowsiness cautions and product labels, without a universal winner for hay fever or hives.

Cough, cold & flu11 min read

Decongestant vs Saline Nasal Spray: Which Should You Use?

Fess or Otrivin? Learn when to use a saline spray, when a decongestant works better, how to avoid rebound congestion, and what's safe in pregnancy and for children.

Cough, cold & flu6 min read

Nasal Decongestants in Australia: Sprays, Tablets and Limits

Compare saline, medicated sprays and tablets, with exact-product cautions, pharmacy access and when to seek advice.

Allergy & hayfever8 min read

Hay Fever Nasal Sprays in Australia: Types, Labels and Cautions

Compare corticosteroid, antihistamine and combination nasal sprays, with formulation-specific age limits, technique and review advice.

Allergy & hayfever8 min read

Cetirizine vs Loratadine vs Fexofenadine: Choosing an Antihistamine

Compare cetirizine, loratadine and fexofenadine by formulation, warnings and your response, with practical questions for a pharmacist.

menu_book

Advice & guides

Cough, cold & flu4 min read

Cold Medicine in Australia: Choose by Symptom

Compare cold symptom relief, check combination ingredients and learn when to ask a pharmacist or seek medical care.

Allergy & hayfever8 min read

Hay Fever Treatment Australia: Complete Guide (2026)

Choose hay fever treatment by symptoms, formulation and safety limits. Covers tablets, nasal sprays, children, pregnancy and when to seek care.

Allergy & hayfever15 min read

Natural Hay Fever Remedies: What the Evidence Actually Says

Saline rinses work. Butterbur may help — with caveats. Local honey probably won't. We grade the evidence on every natural hay fever remedy worth trying.

Cough, cold & flu9 min read

Zinc for Colds & Immunity in Australia: Does It Work? (2026 Evidence Guide)

Does zinc help colds? We unpack the evidence on zinc lozenges, the 24-hour timing rule, acetate vs gluconate, safe doses and the copper warning for Aussies.

Eye, ear & nose9 min read

Saline Nasal Sprays & Sinus Rinses (Australia)

Saline nasal care is drug-free and safe for daily use, pregnancy and kids. How isotonic vs hypertonic saline works, plus how to rinse your sinuses safely.

Cough, cold & flu8 min read

Sinus Infection Treatment in Australia: What Helps

Compare pharmacy relief for a sinus infection in Australia — saline rinses, decongestants and pain relief — plus red flags that mean you should see a GP.

health_and_safety
Medical disclaimer

This information is general in nature and isn’t a substitute for professional medical advice. Always read the label and follow the directions for use. Talk to your pharmacist or doctor about what’s right for you.