Yes. Sinutab products can cause side effects, but the exact effects depend on which Sinutab product you are taking. In South Africa, Sinutab is a brand used for several formulations with different active ingredients. For example, Sinutab Sinus Allergy Congestion & Pain contains paracetamol, pseudoephedrine and chlorphenamine, while Sinutab 3-Way contains ibuprofen and pseudoephedrine. Sinutab Sinus Pain Non-Drowsy contains paracetamol and pseudoephedrine, and Sinutab Sinus Pain Extra Strength also contains chlorphenamine and codeine.
Because the ingredients differ, symptoms such as drowsiness, dizziness, dry mouth, nausea, stomach discomfort, restlessness or a racing heartbeat may be associated with some Sinutab products but not necessarily all of them. Check the exact product name and active ingredients on your pack before comparing your symptoms with a side-effect list.
If you develop trouble breathing, swelling of the face or throat, fainting, a seizure, severe chest pain, severe bleeding, a severe skin reaction, or a sudden severe headache with confusion or vision changes, seek urgent medical attention.
This information is general and does not replace advice from a doctor or pharmacist. If you are unsure whether a symptom is caused by Sinutab, a healthcare professional can assess the timing, your other medicines and your medical history.
For broader information about cold and flu products, see the related parent guide and the OTC Pharmacy Medicine Side Effects hub.
How sinutab Side Effects can be linked to medicines or supplements
A possible Sinutab side effect can sometimes be traced to one of the product’s individual active ingredients rather than the brand as a whole.
Pseudoephedrine is a decongestant found in several South African Sinutab formulations. It can affect the cardiovascular and nervous systems, so some people may experience symptoms such as restlessness, difficulty sleeping, tremor, anxiety, palpitations or changes in blood pressure. The patient leaflet for Sinutab Sinus Allergy Congestion & Pain lists dizziness, drowsiness, headache, upset stomach, difficulty passing urine, blurred vision and dry mouth among its frequent effects, with palpitations, increased heart rate, high blood pressure and sleep disturbances reported less frequently.
Chlorphenamine is a sedating antihistamine. In products containing it, drowsiness, reduced concentration, dizziness, blurred vision and dry mouth may occur. The South African leaflet warns that sleepiness can be worsened by alcohol or other medicines that cause drowsiness.
Paracetamol is included in some Sinutab formulations for pain and fever. It is particularly important not to unintentionally combine a Sinutab product containing paracetamol with another cold, flu or pain medicine containing the same ingredient. The official leaflet warns that taking more paracetamol than recommended can cause severe liver or kidney damage.
Possible medicine categories
Different Sinutab products may contain:
- Decongestants, particularly pseudoephedrine, which can cause stimulation, restlessness, sleep problems, palpitations or blood-pressure changes.
- Antihistamines, such as chlorphenamine, which can contribute to drowsiness, dizziness, blurred vision and dry mouth.
- Pain and fever medicines, including paracetamol or ibuprofen.
- Codeine, in Sinutab Sinus Pain Extra Strength, which can contribute to drowsiness, nausea, constipation and impaired concentration. The South African patient leaflet for this formulation lists dizziness, drowsiness, confusion, headache, upset stomach, constipation, nausea and vomiting among frequent effects.
Sinutab 3-Way contains ibuprofen rather than paracetamol. Its leaflet lists gastrointestinal symptoms such as nausea, upper abdominal pain, constipation, diarrhoea, indigestion, vomiting and flatulence among more frequent effects. Nervousness, sleep difficulty, dizziness, tremor and drowsiness may also occur.
Timing clues
Timing does not prove that Sinutab caused a symptom, but it can provide useful information. Consider whether the symptom:
- began after starting the product;
- repeatedly appears after taking a dose;
- becomes more noticeable when Sinutab is combined with another medicine;
- improves after the expected medicine effect wears off; or
- appeared after changing from one Sinutab formulation to another.
Cold, flu, sinus and allergy symptoms can themselves cause headache, fatigue, nausea or dizziness, so it is not always possible to identify the cause from the symptom alone. A pharmacist or doctor can help distinguish between an illness, a medicine side effect and a possible interaction.
For more general information about how medicines can cause unwanted effects, see medication side effects.
Medicines and product categories that may be associated with this symptom
When you are trying to work out whether Sinutab may be responsible for a new symptom, look beyond the brand name and check all the active ingredients on the packaging.
This is especially important if you are also using another cold, flu, allergy, pain or sinus product. The Sinutab Sinus Allergy Congestion & Pain leaflet specifically warns against taking it with other medicines containing paracetamol, chlorphenamine or pseudoephedrine, or medicines with similar actions. It also lists potential interactions with several medicine groups, including certain antidepressants, blood-pressure medicines, sedating medicines and other sympathomimetics.
Sinutab 3-Way requires different precautions because it contains ibuprofen. Its official leaflet identifies potential problems with medicines including other NSAID painkillers, aspirin, anticoagulants, corticosteroids, some antidepressants, lithium, methotrexate and certain blood-pressure medicines.
Tell your doctor or pharmacist about prescription medicines, over-the-counter products, supplements and complementary or traditional medicines you use. This is especially important if you are pregnant or breastfeeding, have high blood pressure, heart disease, kidney or liver disease, diabetes, glaucoma, asthma, stomach ulcers, problems passing urine, or take several medicines regularly.
Red flags: when this symptom may need urgent medical attention
Red flags
Get urgent medical help if you develop signs of a serious allergic reaction such as swelling of the face, lips, mouth or throat, difficulty swallowing or breathing, or fainting. These are specifically identified as serious reactions in South African Sinutab patient information.
Other symptoms requiring prompt medical assessment can include seizures, hallucinations, unexplained bruising or bleeding, a severe or blistering rash, blood in vomit or stools, severe breathing difficulty, chest pain or symptoms suggesting a stroke. Some of these warnings are particularly relevant to Sinutab 3-Way because of its ibuprofen content.
There is also an important South African safety warning for pseudoephedrine-containing medicines. SAHPRA and the product manufacturer have warned about rare reports of posterior reversible encephalopathy syndrome (PRES) and reversible cerebral vasoconstriction syndrome (RCVS). Warning symptoms include a sudden severe or “thunderclap” headache, nausea or vomiting, confusion, seizures and visual disturbances. Anyone experiencing these symptoms while using a pseudoephedrine-containing medicine should stop using it and obtain immediate medical assistance.
This specific safety advice should not be confused with a routine mild headache. The concern is a sudden, unusually severe headache, particularly when accompanied by neurological symptoms.
What to track before speaking to a doctor or pharmacist
What to track
If your symptoms are not an emergency, writing down a few details can make it easier for a healthcare professional to assess what is happening.
Record the exact Sinutab product name, the active ingredients shown on the pack, when you took it and when the symptom began. Also note what the symptom feels like, how long it lasts, whether it happens after each use and whether it is getting better or worse.
Make a list of any other medicines or supplements you have taken, particularly other cold and flu preparations, painkillers, antihistamines, decongestants or medicines that cause drowsiness. If possible, take the medicine packaging with you when speaking to a pharmacist or doctor.
It can also help to note symptoms such as changes in heart rate, unusual sleepiness, dizziness, nausea, stomach pain, rash, difficulty urinating, anxiety or sleep disturbance.
You can compare symptoms with the site’s side effect symptoms A-Z, but symptom information should not be used to diagnose the cause on your own.
What not to do without medical advice
What not to change without advice
Do not assume that every symptom appearing during a cold or sinus infection is caused by Sinutab. The illness itself, dehydration, another medicine or an interaction may be responsible.
Do not take extra doses because your symptoms have not improved quickly, and do not combine multiple cold, flu or pain products without checking their ingredients. Accidental duplication is particularly important with combination medicines because different brand names may contain the same active ingredient.
If you think you have taken more than the recommended amount of a Sinutab product, contact a doctor, pharmacist, poison information service or hospital urgently rather than waiting for symptoms to develop. The Sinutab Sinus Allergy Congestion & Pain leaflet notes that overdose involving its paracetamol component can cause liver damage.
Do not drive, operate machinery or perform tasks requiring full alertness if the product makes you sleepy, dizzy or affects your vision. This is especially relevant to formulations containing chlorphenamine or codeine.
Pregnancy, breastfeeding, chronic medical conditions and medicines for blood pressure, heart conditions or mental health are additional reasons to check with a doctor or pharmacist before using a combination cold and sinus medicine.
Related side-effect guides and reporting options in South Africa
If you experience a suspected reaction to Sinutab, speak to a doctor or pharmacist, particularly if the effect is new, persistent, worsening or difficult to explain.
You can also report side effects in South Africa. SAHPRA allows members of the public as well as healthcare professionals to report suspected adverse reactions, including through its electronic reporting system or adverse drug reaction form. (Sahpra)
For other pharmacy products and common safety concerns, use the OTC Pharmacy Medicine Side Effects hub.
Is this a common side effect?
It depends on both the symptom and the specific Sinutab formulation. For example, the official Sinutab Sinus Allergy Congestion & Pain leaflet classifies dizziness, drowsiness, headache, upset stomach, dry mouth and several other effects as frequent, while palpitations, high blood pressure, restlessness and anxiety are listed as less frequent. Sinutab 3-Way has a different side-effect profile because it contains ibuprofen.
How long can Sinutab side effects last?
There is no single timeframe for all Sinutab side effects. Duration depends on the active ingredient, the symptom, how much medicine was taken, other medicines being used and individual factors. Mild effects may resolve as the medicine wears off, but persistent, worsening or unusual symptoms should be discussed with a pharmacist or doctor.
Should I stop the medicine?
Do not make medication changes based only on a general side-effect list. For mild or uncertain symptoms, ask a pharmacist or doctor what is appropriate for your particular product and circumstances.
An exception is an emergency reaction or a specific urgent warning in the product information. For example, SAHPRA’s pseudoephedrine safety communication advises people to stop a pseudoephedrine-containing medicine and seek immediate medical help if symptoms suggesting PRES or RCVS develop, such as a sudden severe headache with confusion, seizures or visual disturbance.
When should I seek help?
Seek immediate medical help for trouble breathing, swelling of the face or throat, fainting, seizures, severe chest pain, significant bleeding, a severe skin reaction, stroke-like symptoms, or a sudden severe headache accompanied by confusion or vision changes.
For symptoms that are less urgent but are persistent, worsening or worrying, speak to a doctor or pharmacist. Bring the Sinutab packaging and a list of your other medicines so they can check the exact formulation, possible interactions and whether the symptoms could be medicine-related.