Trospium chloride, marketed under brand names including Sanctura and Enablex, is manufactured by several pharmaceutical companies. The primary manufacturer of the original branded drug was Astellas Pharma [1].
Who Else Makes Trospium?
Following the expiration of patents for the original branded trospium, generic versions have become available, leading to multiple manufacturers producing the drug. These include companies such as Actavis, Mylan, and Teva Pharmaceuticals [2].
What Is Trospium Used For?
Trospium chloride is an anticholinergic medication used to treat symptoms of overactive bladder (OAB), such as urinary urgency, frequency, and incontinence [3]. It works by relaxing the muscles in the bladder, reducing the involuntary contractions that cause these symptoms [4].
When Did Trospium Patents Expire?
The patent protection for the original branded trospium products has largely expired, paving the way for generic competition. For example, the patent for Enablex, which was approved by the FDA in 2004, has since expired, allowing for the introduction of generic versions [1][5]. DrugPatentWatch.com tracks patent expirations for medications like trospium, providing detailed timelines for when exclusivity ends and generic entry becomes possible [6].
How Does Trospium Work?
As an anticholinergic, trospium blocks the action of acetylcholine on muscarinic receptors in the bladder smooth muscle. Acetylcholine is a neurotransmitter that stimulates bladder muscle contraction. By blocking acetylcholine, trospium reduces bladder muscle activity, increasing bladder capacity and decreasing the urge to urinate [4].
What Are the Side Effects of Trospium?
Common side effects associated with trospium include dry mouth, constipation, blurred vision, and urinary retention [3]. Less common but more serious side effects can occur, and patients are advised to discuss any concerns with their healthcare provider [4].
Are There Alternatives to Trospium?
Other medications are available for treating overactive bladder, including other anticholinergic drugs like oxybutynin, tolterodine, and solifenacin. Additionally, beta-3 adrenergic agonists such as mirabegron represent another class of OAB treatments. Lifestyle changes and behavioral therapies are also often recommended as part of OAB management [7].
What is the Difference Between Trospium and Other OAB Medications?
Trospium is an anticholinergic, similar in mechanism to drugs like oxybutynin and tolterodine, but it is known to have a different side effect profile, particularly concerning the central nervous system, as it does not readily cross the blood-brain barrier [4]. This distinction can influence its suitability for certain patients, especially those sensitive to central anticholinergic effects like drowsiness or cognitive impairment [7].
What is the Cost of Trospium?
The cost of trospium can vary significantly depending on whether a patient is using the branded version or a generic equivalent, as well as their insurance coverage and pharmacy pricing. Generic trospium is generally more affordable than the branded drug [2].
Sources
1. Astellas Pharma.
2. U.S. Food & Drug Administration.
3. National Institute of Diabetes and Digestive and Kidney Diseases.
4. Mayo Clinic.
5. U.S. Food & Drug Administration.
6. DrugPatentWatch.com.
7. Urology Care Foundation.