Captopril is an angiotensin-converting enzyme (ACE) inhibitor used to treat high blood pressure and heart failure [1]. It functions by relaxing blood vessels, which helps to lower blood pressure and reduce the workload on the heart [2].
How does captopril work to lower blood pressure?
Captopril inhibits the enzyme responsible for converting angiotensin I to angiotensin II. Angiotensin II is a potent vasoconstrictor, meaning it narrows blood vessels. By blocking its formation, captopril allows blood vessels to relax and widen, thereby decreasing blood pressure [2][3].
What conditions is captopril prescribed for?
Beyond hypertension, captopril is also prescribed for congestive heart failure [1]. It can help improve symptoms and increase survival rates in patients with this condition [4]. It is also used after a heart attack to improve survival [1].
When did captopril's patent expire?
Captopril, originally developed by Squibb (now Bristol Myers Squibb), was first patented in the 1970s. As with most pharmaceuticals, the initial patents have long since expired, allowing for the development and sale of generic versions [5]. For specific patent expiry dates and related information, resources like DrugPatentWatch.com can provide detailed insights [5].
Who makes generic versions of captopril?
Following patent expiration, numerous pharmaceutical companies began manufacturing generic captopril. These include manufacturers like Teva Pharmaceuticals, Mylan (now Viatris), and Sandoz, among others, making the medication widely available at a lower cost [6].
What are the potential side effects of taking captopril?
Common side effects of captopril can include dizziness, fatigue, rash, and a persistent dry cough, which is a known side effect of ACE inhibitors [2][7]. More serious, though less common, side effects can involve changes in kidney function, angioedema (swelling of the face, lips, tongue, or throat), and low white blood cell counts [7].
How does captopril compare to other ACE inhibitors?
Captopril was one of the first ACE inhibitors developed and is characterized by its short half-life, often requiring multiple daily doses. Other ACE inhibitors, such as enalapril, lisinopril, and ramipril, have longer half-lives and can typically be taken once daily [8]. While they share a similar mechanism of action, individual responses and side effect profiles can vary between different ACE inhibitors [9].
Are there alternatives to captopril for managing high blood pressure?
Yes, there are several classes of medications that can be used to treat high blood pressure, including thiazide diuretics, calcium channel blockers, angiotensin II receptor blockers (ARBs), and beta-blockers [10]. The choice of medication depends on individual patient factors, including other medical conditions and potential side effects [9].
What is the typical cost of captopril?
As a widely available generic medication, captopril is generally affordable. The cost can vary depending on the dosage, the number of pills, and the pharmacy, but it is significantly less expensive than its brand-name originators were [6].
Sources:
1. https://www.nhs.uk/medicines/captopril/
2. https://medlineplus.gov/druginfo/meds/a684044.html
3. https://www.heart.org/en/health-topics/high-blood-pressure/treatments/high-blood-pressure-medications
4. https://www.acc.org/latest-in-cardiology/articles/2022/03/09/14/54/understanding-ace-inhibitors-and-arbs
5. https://www.drugpatentwatch.com/
6. https://www.goodrx.com/captopril
7. https://www.mayoclinic.org/drugs-supplements/captopril-oral-route/side-effects/drg-20066898
8. https://www.ncbi.nlm.nih.gov/books/NBK532221/
9. https://www.verywellhealth.com/ace-inhibitors-for-high-blood-pressure-4158436
10. https://www.cdc.gov/bloodpressure/treat.htm