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What is Trimethoprim?

Trimethoprim tablets are an antibiotic medication used to treat cystitis. They are also used for the long-term prevention of recurrent cystitis. This medication can also be used to treat respiratory tract infections.

Store below 25°C in a dry place
Do not use this medication after the expiry date
Take this medication as prescribed

How does Trimethoprim work?

Trimethoprim works by killing the bacteria that cause cystitis. It is an effective way of curing cystitis. Trimethoprim is a widely used antibiotic for treating the infection that causes cystitis.

How do you take Trimethoprim?

Trimethoprim is an antibiotic that is usually taken twice a day for three days, as prescribed to you by your doctor or pharmacist. Trimethoprim tablets should be taken at the same time each day with a glass of water.

How effective is Trimethoprim in treating cystitis in women?

Trimethoprim is a clinically proven way of treating cystitis in women. A short course of this antibiotic can help treat cystitis and reduce the risk of recurring infections. Results may vary from person to person, if you don’t begin to see improvements within 3-14 days*, you should see your doctor to re-evaluate your treatment plan. 

What are the common side effects of Trimethoprim?

Common side effects of Trimethoprim include mild nausea and headaches. For a list of other side effects, please see the patient information leaflet. If you experience any additional side effects please contact your doctor or report them via the Yellow Card Scheme.

The NHS advises that some people have been known to experience an outbreak of the fungal infection called thrush after taking antibiotics, because the antibiotics also kill the good bacteria that stop you getting thrush. Talk to your doctor or pharmacist if this happens to you. 

* Disclaimer: Results and individual responses to treatments may vary from person to person. If you do need medical advice you should always speak to a doctor, pharmacist or appropriate medical professional.