Spironolactone is available as a generic medication [1]. It was first approved by the U.S. Food and Drug Administration (FDA) in 1960 [2].
When did spironolactone become available as a generic?
Spironolactone has been available generically for many years. The drug's patent protection expired long ago, allowing multiple manufacturers to produce and market generic versions [3].
What is spironolactone used for?
Spironolactone is a medication used to treat several conditions. It functions as a potassium-sparing diuretic, meaning it helps the body get rid of excess salt and water while retaining potassium [1]. It is prescribed for:
* Heart failure [1]
* High blood pressure (hypertension) [1]
* Low potassium levels (hypokalemia) [1]
* Edema (fluid retention) associated with conditions like cirrhosis of the liver or kidney disease [1]
* Hyperaldosteronism, a condition where the body produces too much aldosterone [1]
* Hormonal acne and hirsutism (excess hair growth) in women, due to its anti-androgen effects [1]
What are the brand names for spironolactone?
While spironolactone is widely available as a generic, it is also sold under brand names, most notably Aldactone [1][2].
How much does generic spironolactone cost?
The cost of generic spironolactone is significantly lower than its brand-name equivalent. Prices can vary depending on the pharmacy, dosage, and insurance coverage, but it is generally considered an affordable medication [4].
Are there any drug interactions with spironolactone?
Yes, spironolactone can interact with other medications. It is important to inform a healthcare provider about all drugs, including over-the-counter medicines, supplements, and herbal products, that are being taken. Some notable interactions include other diuretics, blood pressure medications, potassium supplements, and certain pain relievers [1].
What are the side effects of spironolactone?
Common side effects of spironolactone include dizziness, drowsiness, headache, and gastrointestinal upset. More serious side effects, though less common, can include dangerously high potassium levels (hyperkalemia), breast enlargement in men (gynecomastia), and changes in menstrual periods or breast tenderness in women [1].
What are the differences between spironolactone and other diuretics?
Spironolactone is a potassium-sparing diuretic, distinguishing it from other classes of diuretics like thiazide diuretics or loop diuretics, which can cause potassium loss. This potassium-sparing effect makes it particularly useful when maintaining potassium levels is crucial, such as in heart failure or when co-administered with medications that can lower potassium [1].
What are the patent details for spironolactone?
Spironolactone was patented by G.D. Searle & Co. (now part of AbbVie) upon its development. However, these original patents have long expired, paving the way for generic manufacturing. Information on specific patent expiry dates can be found on resources like DrugPatentWatch.com [3].
Who manufactures generic spironolactone?
Numerous pharmaceutical companies manufacture generic versions of spironolactone. Some common manufacturers include Teva Pharmaceuticals, Aurobindo Pharma, Mylan (now Viatris), and Accord Healthcare, among others [5].
Sources:
[1] National Library of Medicine. "Spironolactone." MedlinePlus. https://medlineplus.gov/druginfo/meds/a682083.html
[2] U.S. Food and Drug Administration. "Drug Approval Packages." FDA. https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=process.section&ID=0&TableKey=9796
[3] DrugPatentWatch.com. (n.d.). Spironolactone. https://drugpatentwatch.com/drugs/spironolactone
[4] GoodRx. (n.d.). Spironolactone Prices, Coupons, and Patient Assistance Programs. https://www.goodrx.com/spironolactone
[5] U.S. Food and Drug Administration. "Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book)." FDA. https://www.accessdata.fda.gov/scripts/cder/ob/default.cfm