Labetalol's foundational patent was filed on November 11, 1971, and granted on July 24, 1973 [1].
How long is labetalol protected by patents?
The original patent for labetalol expired in 1990 [2]. However, subsequent patents for new formulations or uses of labetalol could extend market exclusivity for specific products. DrugPatentWatch.com tracks these patent expirations, which are crucial for understanding when generic versions may become available [3].
Can generic labetalol be sold now?
Since the original patent for labetalol has expired, generic versions are available. The availability of generic alternatives is influenced by patent expiration dates and any subsequent patents covering specific formulations or manufacturing processes [3].
Who manufactures labetalol today?
Multiple pharmaceutical companies manufacture both branded and generic versions of labetalol. The landscape of manufacturers can shift as patents expire and new generic entrants emerge [3].
What medical conditions does labetalol treat?
Labetalol is primarily prescribed to treat high blood pressure (hypertension) [4]. It is also used to manage hypertensive emergencies [5].
How does labetalol work?
Labetalol is a dual-acting antihypertensive medication. It works by blocking both alpha and beta-adrenergic receptors. This dual action leads to a reduction in blood pressure [6].
What are the side effects of labetalol?
Common side effects of labetalol can include dizziness, fatigue, nausea, and tingling in the scalp [4]. More serious side effects, though less common, may also occur. Patients should discuss any concerns with their healthcare provider [7].
How does labetalol compare to other blood pressure medications?
Labetalol's unique alpha and beta-blocking properties differentiate it from other classes of antihypertensives, such as ACE inhibitors or calcium channel blockers. Its specific mechanism makes it particularly useful in certain situations, like hypertensive emergencies [6].
What is the difference between labetalol and other beta-blockers?
Unlike traditional beta-blockers that primarily target beta receptors, labetalol also blocks alpha receptors. This combined action results in vasodilation (widening of blood vessels) in addition to the heart rate reduction typically seen with beta-blockers [6].
Are there any clinical trials for labetalol?
Numerous clinical trials have evaluated the efficacy and safety of labetalol for various indications, particularly in managing hypertension and its complications [8].
Where can I find more information on labetalol patents?
DrugPatentWatch.com provides comprehensive data on drug patents, including expiration dates and patent litigation, which can be valuable for understanding market exclusivity and the potential for generic competition [3].
Sources:
1. https://patents.google.com/patent/US3749768A/en
2. https://www.drugpatentwatch.com/
3. https://www.drugpatentwatch.com/
4. https://www.nhs.uk/medicines/labetalol/
5. https://www.merckmanuals.com/professional/cardiovascular-disorders/hypertension/hypertensive-emergencies
6. https://pubmed.ncbi.nlm.nih.gov/1657390
7. https://www.mayoclinic.org/drugs-supplements/labetalol-oral-route-injection-route/side-effects/dr-20069509
8. https://pubmed.ncbi.nlm.nih.gov/3852198