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Any use of this site constitutes your agreement to the Terms and Conditions and Privacy Policy linked below. This site complies with the HONcode standard for trustworthy health information: verify here. Find an article. This medicine is mainly used to treat urinary tract infections.
This article provides an overview of the medication and how it should be taken. Trimethoprim works by stopping a step in the process of making DNA in bacteria. Usual dose: To clear up a urinary tract infection the usual adult dose is mg once a day. Cautions: Trimethoprim should be avoided if a person: Has very bad kidneys Is allergic to trimethoprim Has serious blood problems Is pregnant Extra care should be taken if a person: Has a bad liver May be low in folate Has porphyria or is at risk of porphyria Is elderly The doctor may want to take regular blood counts if you are using trimethoprim for a long time.
Side effects: Most people do not have any side effects with this medicine, however the more likely side effects are: Itching Skin rash talk to a doctor Stomach upset Sore mouth Trimethoprim can cause blood problems in rare cases.
Interactions: Possible drug interactions include: Warfarin Phenytoin Pyrimethamine a malaria preventer Cyclosporin Procainamide Amantadine Digoxin Methotrexate Zidovudine Lamivudine Dapsone Patient information: Follow the instructions on the label of the medicine or as directed by your doctor.
Tell your doctor if you think you might be pregnant. Talk to a doctor if you get a skin rash while taking this medicine. Finish the course the doctor has given you. This is available without a prescription to women aged between 16 to 65 years, who are not pregnant and do not have any other complicating factors.
Only pharmacists who have completed additional training can supply trimethoprim. They will need to ask you questions to make sure it is the best option for you and will need to record your name and address.
Like all medicines, trimethoprim can cause side effects, although not everyone gets them. Often side effects improve as your body adjusts to the new medicine. Trimethoprim may interact with some medicines and herbal supplements so check with your doctor or pharmacist before starting trimethoprim or before starting any new medicines.
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