Decofed combines pseudoephedrine, a decongestant, with triprolidine, a sedating antihistamine. It is used for a blocked and runny nose with sneezing — in colds, flu, hay fever and sinus congestion. It comes as tablets and syrup, causes drowsiness, and is intended for short-term use only.
What is Decofed?
Decofed is registered in South Africa as Schedule 2, available from a pharmacist:
| Form | Contains |
|---|---|
| Decofed tablet | Pseudoephedrine 30 mg + triprolidine |
| Decofed syrup | Pseudoephedrine 30 mg/5 ml + triprolidine |
The two ingredients address different symptoms.
Pseudoephedrine is a decongestant. It stimulates alpha-adrenergic receptors on blood vessels in the nasal lining, causing them to narrow. A blocked nose is largely swollen, engorged tissue rather than mucus, so narrowing those vessels reduces the swelling and opens the airway.
Triprolidine is a first-generation antihistamine. It blocks histamine H1 receptors, reducing sneezing, itching and a runny nose. Being first-generation, it crosses into the brain and causes marked drowsiness — unlike newer antihistamines such as loratadine and cetirizine, which do not.
This combination is designed for the full picture — blocked and running, sneezing and congested — which single-ingredient products do not cover as well.
Two things follow that matter practically:
- Pseudoephedrine is a stimulant, chemically related to adrenaline. It can cause restlessness, palpitations, raised blood pressure and difficulty sleeping. It is not a benign ingredient, and it is the reason for most of the cautions below.
- The antihistamine sedates while the decongestant stimulates. People often find this combination makes them simultaneously drowsy and unable to sleep well. Do not drive or operate machinery until you know how it affects you.
Pseudoephedrine is sold under pharmacist supervision in South Africa, and purchases may be recorded, because it can be diverted into illicit methamphetamine manufacture. If you are asked for identification, that is why — it is not a judgement about you.
What is Decofed commonly used for?
- Nasal congestion from a cold or flu.
- Runny nose and sneezing accompanying congestion.
- Sinus congestion and sinus pressure.
- Hay fever and allergic rhinitis, where both blockage and runny nose are present.
- Blocked ears or pressure, sometimes for air travel with congestion.
- Post-nasal drip.
It treats symptoms, not causes. It has no effect on the virus behind a cold, and it does not shorten it.
It is intended for short-term use — a few days at most. Two reasons:
- Prolonged decongestant use is not appropriate, particularly with the cardiovascular effects of pseudoephedrine.
- For ongoing allergic rhinitis, this is the wrong treatment. A steroid nasal spray works better and does not sedate you or raise your blood pressure.
How Decofed fits into this medicine category
| Group | Examples | Notes |
|---|---|---|
| Oral decongestants | Pseudoephedrine (Decofed) | Reduce nasal swelling; stimulant effects |
| Nasal decongestant sprays | Oxymetazoline, xylometazoline | Fast and effective; max 3–5 days |
| Sedating antihistamines | Triprolidine, chlorphenamine | Sneezing and runny nose; drowsiness |
| Non-sedating antihistamines | Loratadine, cetirizine | Allergy without sedation |
| Steroid nasal sprays | Fluticasone, budesonide | Best for persistent allergic rhinitis |
| Mucolytics | Acetylcysteine, bromhexine | Thin mucus in chesty coughs |
A caution about nasal decongestant sprays worth knowing alongside this: used beyond about five days they cause rebound congestion, where the nose blocks worse each time the spray wears off, driving continued use. Oral decongestants like Decofed do not cause this, though they have their own limits. See the allergy, cold, flu and respiratory medicines hub.
What to check before using Decofed
Check other cold and flu products before combining. Many contain pseudoephedrine, an antihistamine, or paracetamol — and doubling up on any of these is easy and unhelpful.
Do not take it late in the day if it keeps you awake.
Speak to a pharmacist or doctor first if you:
- Have high blood pressure. Pseudoephedrine raises it, and this is the most common reason it is unsuitable.
- Have heart disease, angina, or an irregular heartbeat.
- Have an overactive thyroid.
- Have diabetes, as pseudoephedrine can raise blood sugar.
- Have glaucoma, particularly narrow-angle.
- Have prostate enlargement or difficulty passing urine — both ingredients can worsen this, and urinary retention is a recognised risk.
- Have kidney or liver disease.
- Have epilepsy.
- Are elderly, where sedation, confusion, falls and urinary retention are all more likely.
- Are pregnant or breastfeeding. Pseudoephedrine is generally avoided in pregnancy and can reduce milk supply.
- Are giving it to a child. Decongestant and antihistamine combinations are not recommended in young children, and should not be given under six without medical advice.
- Take an MAOI antidepressant — this combination can cause a dangerous rise in blood pressure and must be avoided, including for two weeks after stopping one.
- Take blood pressure medicines, tricyclic antidepressants, beta-blockers, or any other sedating medicine.
Do not drink alcohol with it, which adds to the drowsiness.
Possible cautions and when to ask a pharmacist or doctor
Common effects are drowsiness, dry mouth, dizziness, difficulty sleeping, restlessness, palpitations, blurred vision and constipation.
Stop and seek medical attention if you develop:
- Chest pain, a fast or irregular heartbeat, or severe palpitations — seek emergency care for chest pain.
- A severe headache, particularly with visual disturbance, or symptoms of very high blood pressure.
- Inability to pass urine.
- Marked confusion, agitation or hallucinations, particularly in an older person.
- Eye pain with blurred vision or halos around lights — possible acute glaucoma, an emergency.
- A seizure.
- Swelling of the face, lips or tongue, or a severe rash.
- Restlessness or excitability instead of drowsiness — a recognised paradoxical reaction, more common in children.
See a doctor rather than continuing if:
- Symptoms last more than about a week, or worsen.
- You have facial pain, thick discoloured discharge and fever, suggesting a sinus infection.
- You have a high or persistent fever.
- You have breathlessness or wheezing.
- You have one-sided nasal blockage or nosebleeds, which need examination.
- You need a decongestant regularly or for weeks — that points to allergic rhinitis or another cause needing different treatment.
- Ear pain or hearing loss develops.
Related medicine guides
- Browse Allergy, Cold, Flu & Respiratory Medicines guides
- Read: Austell Cetirizine used for
- Read: Rhineton used for
Frequently asked questions
What are Decofed tablets used for? A blocked and runny nose with sneezing — in colds, flu, hay fever and sinus congestion. They contain pseudoephedrine, a decongestant, with triprolidine, an antihistamine.
What is Decofed syrup used for? The same symptoms in liquid form. Ask a pharmacist before giving it to a child, as these combinations are not recommended in young children.
Does it make you drowsy? Yes — the triprolidine is a sedating antihistamine. The pseudoephedrine can also make it hard to sleep, so people often feel both drowsy and restless.
Is it an antibiotic? No. It relieves symptoms and has no effect on infection.
Can I take it with high blood pressure? Ask a pharmacist first. Pseudoephedrine raises blood pressure and is often unsuitable.
Why do I have to ask the pharmacist for it? Pseudoephedrine is sold under supervision because it can be diverted into illicit drug manufacture. Being asked for identification is routine.
How long can I take it? A few days at most. Ongoing symptoms need a different approach — a steroid nasal spray is better for persistent allergic rhinitis.
Can I give it to my child? Not under six without medical advice. Decongestant and antihistamine combinations are not recommended in young children.