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Trimethoprim 200mg Tablets


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  • Effective broad-spectrum antibiotic for a range of bacterial infections.
  • Particularly beneficial for long-term prevention of urinary tract infections.
  • Suitable for adults and children over 12 years.
  • Buy online from a UK-licensed pharmacy following a free online consultation.

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Trimethoprim for Cystitis and Urinary Tract Infection (UTI)

A view from our expert
Sakib Mohammed

Sakib Mohammed

Advance Pharmacist Prescriber

"Trimethoprim 200mg tablets are a reliable choice for treating bacterial infections like cystitis, especially for patients seeking a long-term solution for recurrent infections."

Buy Trimethoprim Tablets Online

Trimethoprim is an antibiotic used to treat various bacterial infections. Its broad-spectrum nature allows it to target and eliminate a wide range of bacteria to prevent and treat various bacterial infections like cystitis and urinary tract infections (UTIs), offering a reliable solution for both immediate treatment and long-term management.

What Is Trimethoprim Used For?

Trimethoprim is an antibiotic primarily aimed at treating and preventing UTIs. Its effectiveness lies in targeting the bacteria that cause these infections, helping to alleviate common symptoms associated with UTIs, such as:

  • Burning during urination
  • Frequent urination
  • Abdominal pain

 Trimethoprim is suitable for a range of other bacterial infections, like chest infections and acne.

How Does Trimethoprim Work?

Trimethoprim stops the spread of bacterial infections by blocking the bacteria’s ability to make folic acid, which they need to grow and multiply. This helps to treat the infection and ease symptoms.

What Dose of Trimethoprim Do I Need?

The typical dosage for adults and children over 12 years is 200mg, taken twice a day. For long-term treatment and prevention, the dose may be reduced to 100mg at night.

Who are Trimethoprim 200mg Tablets Suitable For?

Trimethoprim is suitable for most people needing treatment for bacterial infections, especially UTIs. However, it should not be used by those who:

  • Are allergic to any of its ingredients
  • Have certain blood disorders
  • Are pregnant
  • Have severe liver disease
  • Or in premature babies and babies in their first few weeks of life.

It’s also important to be cautious if you have kidney disease, are undergoing dialysis, or have a folic acid deficiency.

How to Take Trimethoprim 200mg Tablets

Trimethoprim 200mg tablets should be taken orally and swallowed whole with a glass of water.

For acute infections, such as bacterial cystitis, the typical duration of treatment ranges from 3 to 14 days. It’s essential to complete the full course of Trimethoprim, even if you start feeling better before the end of the prescribed period. 

If you forget to take a dose of Trimethoprim, take it as soon as you remember. However, if it’s nearly time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a forgotten one, as this can increase the risk of side effects. 

In cases of long-term treatment for preventing recurrent infections, follow the prescription carefully, as regular intake at the same time each day helps maintain consistent levels of the medication in your body, enhancing its effectiveness.

Where Can I Buy Trimethoprim Online?

You can buy Trimethoprim online from our online cystitis treatment clinic. Complete a free consultation, and once reviewed by a licensed pharmacist, we will issue your prescription and deliver the medication directly to your door in discrete packaging.

Trimethoprim Side Effects

Common Side Effects

  • High levels of potassium in the blood (abnormal heart rhythm)
  • Nausea
  • Diarrhoea
  • Headache
  • Skin rashes
  • Urticaria
  • Anaemia
  • Sore throats
  • Mouth ulcers
  • Thrush

Uncommon Side Effects

  • Constipation
  • Severe watery/bloody diarrhoea

Serious Side Effects

  • Difficulty breathing
  • Swelling of the face, lips, tongue, or throat
  • Chest pain
  • Shock, fainting, or collapse
  • Blistering/peeling of the skin
  • Pancreatitis

If you experience any rare, serious, or concerning side effects, stop using Trimethoprim and seek immediate medical attention.

For a full list of side effects, read the patient information leaflet.

Trimethoprim 200mg Tablets Ingredients

Active Ingredients: Trimethoprim.

Other ingredients: Lactose monohydrate, Povidone K-25, Crospovidone, Sodium starch glycolate (Type A), Magnesium stearate.

Important Information

  • Do not take Trimethoprim if allergic to its ingredients, with certain blood disorders, if pregnant, or with severe liver disease.
  • Not suitable for premature babies or newborns.
  • Caution is needed if having kidney disease or undergoing dialysis.
  • Be aware of increased potassium levels, especially in people with kidney problems, poorly controlled diabetes, or those taking certain medicines.

Trimethoprim 200mg Tablets FAQs

Trimethoprim typically begins to alleviate symptoms of cystitis within a few days of starting treatment, with full effectiveness depending on the severity and type of infection.

While there is no specific warning against alcohol consumption while taking Trimethoprim, it’s always advisable to consult your doctor or pharmacist, especially if you are taking other medications or have existing health conditions.

Trimethoprim should not be used during pregnancy. Consult your doctor or pharmacist for advice if you are pregnant or planning to become pregnant and have cystitis symptoms.

The length of time for which you can continue to take Trimethoprim 200mg tablets depends on several factors. These primarily include the type of bacterial infection you have and the severity of your symptoms.

For some mild infections, a short course of treatment may be sufficient. However, more serious or complicated infections may require a longer period of Trimethoprim use to ensure the bacteria are completely eradicated from your system.

Store Trimethoprim below 25°C in a dry place, away from children. Do not use after the expiry date, and dispose of unused medicine responsibly.

Yes, you can buy Trimethoprim 200mg tablets online from licensed pharmacies like our online cystitis treatment clinic.

Trimethoprim may interact with other medications such as antibiotics, anticoagulants, medications for heart conditions, epilepsy, malaria, and others. Always disclose any medications you are taking during your online consultation for review by a pharmacist.

Customer Reviews

Based on 68 reviews
Ibrahim Ahsan
Ibrahim Ahsan
Very helpful staff, never had any issues with this pharmacy, 100% recommend
Julie Beardsley
Julie Beardsley
Very professional service. Just like having your very own pharmacist. Brilliant
Mohammed Khan
Mohammed Khan
Just had private bloods taken short wait time very thorough good price nice lady would recommend.
Sarah Smithies
Sarah Smithies
It is great to have somewhere local that does blood testing. The staff are lovely, helpful and experienced. They fit me in last minute. There is never a wait and the results back within a day or two.
After refusal of doctors appointment same old same old ring back etc. I was invited at 5.25 to see doctor I drove over immediately. Everything fully explained and checked over I was leaving by 6pm with penicillin for strep throat. Had I followed my doctors receptionist I would probably have suffered longer and increased the chances of a worse infection.I Great efficient service.
Lisa Lowther
Lisa Lowther
Fantastic service went for blood done very fast very friendly fantastic customer service
Trimethoprim 200Mg Tablets


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Trimethoprim 200Mg Tablets


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Trimethoprim 200Mg Tablets


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