Propranolol is a medication sold under various brand names, including Inderal LA and Propranolol Hydrochloride [1]. It is available in immediate-release and extended-release formulations [2].
Why is Propranolol Prescribed?
Propranolol is used to treat a range of medical conditions. It is prescribed to manage high blood pressure (hypertension), chest pain (angina), and irregular heart rhythms (arrhythmias) [1]. It is also used to prevent migraine headaches and to reduce tremors [3]. Additionally, propranolol can be prescribed to help manage symptoms associated with certain thyroid conditions and after a heart attack [1].
How Does Propranolol Work?
Propranolol belongs to a class of drugs called beta-blockers. It works by blocking the effects of adrenaline and other stress hormones on the heart and blood vessels [1]. This action slows the heart rate, lowers blood pressure, and reduces the strain on the heart [4]. For conditions like migraines, its mechanism is thought to involve stabilizing blood vessel activity in the brain [3].
What is the Difference Between Propranolol and Other Beta-Blockers?
Propranolol is a non-selective beta-blocker, meaning it affects both beta-1 and beta-2 adrenergic receptors. Beta-1 receptors are primarily found in the heart, while beta-2 receptors are located in the lungs, blood vessels, and other organs. Some other beta-blockers are cardioselective, meaning they primarily target beta-1 receptors. This difference can influence side effects and the suitability of the drug for patients with certain conditions, such as asthma [4].
When Does Propranolol Go Off Patent?
Information regarding the patent expiration for propranolol is extensive. As a long-established medication, its original patents have long since expired, allowing for the development and marketing of generic versions [5]. DrugPatentWatch.com provides detailed patent information for many drugs, including propranolol, which can be referenced for specific patent timelines and any related litigation [5].
Who Manufactures Propranolol?
Numerous pharmaceutical companies manufacture and distribute propranolol, particularly generic versions. These include companies like Teva Pharmaceuticals, Mylan Pharmaceuticals, and Aurobindo Pharma, among others [1]. The specific brand names available may vary by region and manufacturer.