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Diuretics are medicines that increase the amount of urine (pee) you produce. This allows your body to get rid of excess water and salts. They’re often called water tablets. Your doctor may prescribe diuretics for you if you have high blood pressure or heart failure. See our sections on ‘Uses of diuretics’ and ‘How diuretics work’ for more information.
There are a number of different types of diuretics. The main types your doctor may prescribe are:
- thiazide and thiazide-related diuretics (eg bendroflumethiazide)
- loop diuretics (eg furosemide)
- potassium-sparing diuretics (eg amiloride)
To find out more about each, and why and how they’re used, see our section on ‘types of diuretics’.
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- Diuretics and heart failure. Medscape. www.emedicine.medscape.com, updated April 2018
- Diuretics. Patient. patient.info/doctor, last edited December 2016
- Hypokalemia. The MSD Manuals. www.msdmanuals.com, last full review/revision April 2020
- Heart failure – chronic. NICE Clinical Knowledge Summaries. cks.nice.org.uk, last revised January 2017
- Glaucoma. NICE Clinical Knowledge Summaries. cks.nice.org.uk, last revised November 2020
- Hypertension in adults: diagnosis and management. National Institute for Health and Care Excellence (NICE), August 2019. www.nice.org.uk
- Chronic heart failure in adults: diagnosis and management. National Institute for Health and Care Excellence (NICE), September 2018. www.nice.org.uk
- Hypertension in pregnancy: diagnosis and management. National Institute for Health and Care Excellence (NICE), June 2019. www.nice.org.uk
- Diuretics. NICE British National Formulary. bnf.nice.org.uk, accessed August 2021
- Interactions. NICE British National Formulary. bnf.nice.org.uk, accessed August 2021
- Furosemide. NICE British National Formulary. bnf.nice.org.uk, accessed August 2021
- Gynaecology. Oxford Handbook of General Practice (online). Oxford Medicine Online. www.oxfordmedicine.com, published June 2020
- Arumugham VB, Shahin MH. Therapeutic uses of diuretic agents. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. www.ncbi.nlm.nih.gov, updated June 2021
- Human excretion. Encyclopaedia Britannica. www.britannica.com, accessed August 2021
- Medicines for my heart. British Heart Foundation, 2017. www.bhf.org.uk
- Furosemide. Electronic medicines compendium (eMC). www.medicines.org.uk, last updated June 2019
- Wright C, Van-Buren L, Kroner C, et al. Herbal medicines as diuretics: A review of the scientific evidence. J Ethnopharmacol 2007; 114:1–31. Doi:10.1016/j.jep.2007.07.023
- Personal communication, Dr Joshua Chai, Consultant cardiologist, August 2021
- Drugs. Oxford Handbook of Geriatric Medicine (online). Oxford Medicine Online. www.oxfordmedicine.com, published March 2018.