Sulfamethoxazole+Trimethoprim is used to prevent and treat bacterial infections in the bladder or urinary tract, lungs, stomach or intestines.
This medicine may be used to treat other conditions as decided by your doctor.
Take Sulfamethoxazole+Trimethoprim exactly as directed by your doctor or according to the instructions on the label. Do not take more or less than instructed by your doctor.
This medicine should be taken with food and at regular intervals for it to be effective. Continue taking this medicine even when you feel better. Do not stop taking it unless instructed by the doctor.
Do not skip any doses. You must complete the entire course of antibiotic. If you don't, the infection will not clear completely.
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your normal dosing schedule.
DO NOT double a dose under any circumstances.
If you often forget to take your medicine, let your doctor and pharmacist know.
Do not take Sulfamethoxazole+Trimethoprim if you have a history of allergic reactions (swollen eyes or mouth, difficulty breathing, rashes) to this medicine.
Alert your doctor if you have liver disease or a blood disorder called “megaloblastic anaemia”, as this medicine may not be suitable for you.
Do not give this medicine to infants under 2 months old unless instructed to do so by the doctor.
Inform your doctor if you have the following conditions:
- kidney disease
- severe allergy or asthma
- blood disorder
- low immune system e.g. AIDS patients
- alcohol dependence
- lack of nourishment
- porphyria (an inherited disorder that may cause skin or nerve problems)
- G6PD deficiency (an inherited blood disorder that affects the red blood cell)
Let your doctor know if you are pregnant or breastfeeding.
For as long as you are taking this medicine, blood tests, urinalysis and kidney function test must be done regularly to check your body's response to the medicine. Your doctor will advise you how often you need to have them.
This medicine may cause any of the following side effects: nausea, vomiting, diarrhoea, skin rashes, headache, hallucinations and depression.
Some side effects may need immediate medical help. Alert your doctor quickly if you experience any of the following:
- rashes with peeling of the skin or blistering of the lips, mouth or eyes accompanied by fever
- unusual bleeding or bruising, frequent and persistent sore throat with fever
- yellowing of the skin or eyes
You will need to increase fluid intake to reduce the risk of crystalluria (presence of crystals in the urine).
Inform your doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Inform your doctor and pharmacist if you are taking any of these medicines:
- warfarin (blood-thinning medicine)
- medicines for epilepsy (fits or seizures) e.g. phenytoin
- medicines for cancer e.g. methotrexate
- medicines for organ transplant or immune disorder e.g. ciclosporin
- medicines for pain and inflammation e.g. indometacin
- medicines for malaria e.g. pyrimethamine
- medicines for heart disease e.g. digoxin
This list does not include all medicines that may interact with this medicine.
Always notify your doctor and pharmacist if you are taking any other medicines, including herbal tonics such as traditional Chinese medicines, supplements and medicines that you buy without a prescription.
Store in a cool, dry place away from the reach of children.
Medicines must not be used past the expiry date.