Hydrochlorothiazide
Clinical data | |
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Trade names | Hydrodiuril, others |
Other names | HCTZ, HCT |
AHFS/Drugs.com | Monograph |
MedlinePlus | a682571 |
License data | |
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By mouth | |
ATC code | |
Legal status | |
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Pharmacokinetic data | |
Bioavailability | Variable (~70% on average) |
Metabolism | Not significant[3] |
Elimination half-life | 5.6–14.8 h |
Excretion | Primarily kidney (>95% as unchanged drug) |
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JSmol) | |
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Hydrochlorothiazide, sold under the brand name Hydrodiuril among others, is a
Potential side effects include poor kidney function, electrolyte imbalances, including low blood potassium, and, less commonly, low blood sodium, gout, high blood sugar, and feeling lightheaded with standing.[4]
Two companies, Merck & Co. and Ciba Specialty Chemicals, state they discovered the medication which became commercially available in 1959.[7] It is on the World Health Organization's List of Essential Medicines.[8] It is available as a generic drug[4] and is relatively affordable.[9] In 2021, it was the twelfth most commonly prescribed medication in the United States, with more than 39 million prescriptions.[10][11]
Medical uses
Hydrochlorothiazide is used for the treatment of
Multiple studies suggest hydrochlorothiazide could be used as initial monotherapy in people with primary hypertension; however, the decision should be weighed against the consequence of long-term adverse metabolic abnormalities.[12][13] Doses of hydrochlorothiazide of 50 mg or less over four years reduced mortality and development of cardiovascular diseases better than high-dose hydrochlorothiazide (50 mg or more) and beta-blockers.[5] A 2019 review supported equivalence between drug classes for initiating monotherapy in hypertension, although thiazide or thiazide-like diuretics showed better primary effectiveness and safety profiles than angiotensin-converting enzyme inhibitors and non-dihydropyridine calcium channel blockers.[12]
Low doses (50 mg or less) of hydrochlorothiazide as first‐line therapy for hypertension were found to reduce total mortality and cardiovascular disease events over a four-year study.
Hydrochlorothiazide is also sometimes used to prevent osteopenia and treat hypoparathyroidism,[17] hypercalciuria, Dent's disease, and Ménière's disease.
A low level of evidence, predominantly from observational studies, suggests that thiazide diuretics have a modest beneficial effect on bone mineral density and are associated with a decreased fracture risk when compared with people not taking thiazides.[18][19][20] Thiazides decrease mineral bone loss by promoting calcium retention in the kidney, and by directly stimulating osteoblast differentiation and bone mineral formation.[21]
The combination of fixed-dose preparation such as losartan/hydrochlorothiazide has added advantages of a more potent antihypertensive effect with additional antihypertensive efficacy at the dose of 100 mg/25 mg when compared to monotherapy.[22][23]
Adverse effects
- Hypokalemia, or low blood levels of potassium are an occasional side effect. It can be usually prevented by potassium supplements or by combining hydrochlorothiazide with a potassium-sparing diuretic
- Other disturbances in the levels of serum electrolytes, including hypercalcemia(high calcium)
- Hyperuricemia (high levels of uric acid in the blood). All thiazide diuretics including hydrochlorothiazide can inhibit excretion of uric acid by the kidneys, thereby increasing serum concentrations of uric acid. This may increase the incidence of gout in doses of ≥ 25 mg per day and in more susceptible patients such as male gender of <60 years old.[23][24][25]
- Hyperglycemia, high blood sugar
- Hyperlipidemia, high cholesterol and triglycerides
- Headache
- Nausea/vomiting
- Photosensitivity
- Weight gain
- Pancreatitis
Package inserts contain vague and inconsistent data surrounding the use of thiazide diuretics in patients with allergies to sulfa drugs, with little evidence to support these statements.[26] A retrospective cohort study conducted by Strom et al. concluded that there is an increased risk of an allergic reaction occurring in patients with a predisposition to allergic reactions in general rather than cross reactivity from structural components of the sulfonamide-based drug.[27] Prescribers should examine the evidence carefully and assess each patient individually, paying particular attention to their prior history of sulfonamide hypersensitivity rather than relying on drug monograph information.[28]
There is an increased risk of non-melanoma skin cancer.[29] In August 2020, the Australian Therapeutic Goods Administration required the Product Information (PI) and Consumer Medicine Information (CMI) for medicines containing hydrochlorothiazide to be updated to include details about an increased risk of non-melanoma skin cancer.[30] In August 2020, the U.S. Food and Drug Administration (FDA) updated the drug label about an increased risk of non-melanoma skin cancer (basal cell skin cancer or squamous cell skin cancer).[31]
Society and culture
Brand names
Hydrochlorothiazide is available as a generic drug under a large number of brand names, including Apo-Hydro, Aquazide, BPZide, Dichlotride, Esidrex, Hydrochlorot, Hydrodiuril, HydroSaluric, Hypothiazid, Microzide, Oretic and many others.[medical citation needed]
To reduce pill burden and in order to reduce side effects, hydrochlorothiazide is often used in fixed-dose combinations with many other classes of antihypertensive drugs such as:
- ACE inhibitors – e.g. Prinzide or Zestoretic (with lisinopril), Co-Renitec (with enalapril), Capozide (with captopril), Accuretic (with quinapril), Monopril HCT (with fosinopril), Lotensin HCT (with benazepril), etc.
- Angiotensin receptor blockers – e.g. Hyzaar (with losartan), Co-Diovan or Diovan HCT (with valsartan), Teveten Plus (with eprosartan), Avalide or CoAprovel (with irbesartan), Atacand HCT or Atacand Plus (with candesartan), etc.
- Beta blockers – e.g. Ziac or Lodoz (with bisoprolol),[32] Nebilet Plus or Nebilet HCT (with nebivolol), Dutoprol or Lopressor HCT (with metoprolol), etc.
- Direct renin inhibitors – e.g. Co-Rasilez or Tekturna HCT (with aliskiren)
- Potassium sparing diuretics – Dyazide and Maxzide triamterene[33]
Sport
Use of hydrochlorothiazide is prohibited by the World Anti-Doping Agency for its ability to mask the use of performance-enhancing drugs.[34]
References
- ^ "Hydrochlorothiazide Use During Pregnancy". Drugs.com. 30 July 2019. Retrieved 19 January 2020.
- FDA. Retrieved 22 October 2023.
- S2CID 22159706.
- ^ a b c d e f g h "Hydrochlorothiazide". Drugs.com. 15 November 2022. Retrieved 31 May 2023.
- ^ PMID 29667175.
- ^ PMID 20528637. NIHMSID: NIHMS215063.
- ISBN 9783527326693. Archivedfrom the original on 10 January 2015.
- hdl:10665/345533. WHO/MHP/HPS/EML/2021.02.
- ^ "Best drugs to treat high blood pressure The least expensive medications may be the best for many people". November 2014. Archived from the original on 3 January 2015. Retrieved 10 January 2015.
- ^ "The Top 300 of 2021". ClinCalc. Archived from the original on 15 January 2024. Retrieved 14 January 2024.
- ^ "Hydrochlorothiazide - Drug Usage Statistics". ClinCalc. Retrieved 14 January 2024.
- ^ PMID 31668726.
- PMID 28813123.
- ^ PMID 32065600.
- PMID 22547443.
- S2CID 13017777.
- PMID 23043192.
- PMID 21975748.
- S2CID 4322516.
- PMID 26449354.
- PMID 17656470.
- S2CID 26447230.
- ^ PMID 24869750.
- PMID 22221907.
- PMID 25258088.
- S2CID 10642527.
- PMID 14573734.
- PMID 23489131.
- PMID 29217346.
- ^ "Hydrochlorothiazide". Therapeutic Goods Administration (TGA). 24 August 2020. Retrieved 22 September 2020.
- ^ "FDA approves label changes to hydrochlorothiazide". U.S. Food and Drug Administration (FDA). 20 August 2020. Retrieved 28 August 2020. This article incorporates text from this source, which is in the public domain.
- ^ "List of nationally authorised medicinal products : Active substance: bisoprolol / hydrochlorothiazide Procedure no.: PSUSA/00000420/202111" (PDF). Ema.europa.eu. Retrieved 16 July 2022.
- ^ "Triamterene and Hydrochlorothiazide". MedlinePlus. 1 January 2020. Archived from the original on 2 January 2020. Retrieved 1 January 2020.
- ^ "Prohibited List" (PDF). World Anti-Doping Agency. January 2018.