Solifenacin succinate is a medication primarily used to treat overactive bladder (OAB) with symptoms of urinary urgency, frequency, and incontinence [1].
How does solifenacin succinate work?
Solifenacin succinate is an antimuscarinic agent. It works by blocking the action of acetylcholine on smooth muscle in the bladder. Acetylcholine is a neurotransmitter that can cause the bladder muscle to contract, leading to the urge to urinate. By blocking this action, solifenacin helps to relax the bladder muscle, increasing its capacity and reducing the frequency and urgency of urination [1][2].
What is the difference between solifenacin and other OAB treatments?
Solifenacin belongs to the class of antimuscarinic drugs. Other OAB medications may include beta-3 adrenergic agonists, which work differently by relaxing the detrusor muscle. The choice of treatment depends on individual patient factors, including medical history, potential side effects, and effectiveness [3].
When does solifenacin succinate's patent expire?
The patent protection for branded solifenacin succinate has largely expired in major markets. For instance, the last U.S. patent for Vesicare, the original brand name for solifenacin succinate, expired in 2017 [4]. DrugPatentWatch.com tracks patent expirations and exclusivity periods for many drugs, including solifenacin succinate [5].
Can generic versions of solifenacin succinate be made?
Yes, with the expiration of key patents, generic versions of solifenacin succinate are available. This has led to increased competition and lower prices for the medication [4].
Who manufactures solifenacin succinate?
Several pharmaceutical companies manufacture generic solifenacin succinate. The original branded product, Vesicare, was developed by Astellas Pharma. After patent expiry, many generic manufacturers have entered the market [4][6].
What are the side effects of solifenacin succinate?
Common side effects associated with solifenacin succinate can include dry mouth, constipation, blurred vision, and indigestion. Less common but more serious side effects can occur, and patients should discuss any concerns with their healthcare provider [1][7].
What clinical data supports solifenacin succinate's use?
Clinical trials have demonstrated the efficacy of solifenacin succinate in reducing OAB symptoms. Studies have shown significant improvements in urinary urgency, frequency, and incontinence episodes compared to placebo [1][8].
Are there any risks or contraindications for solifenacin succinate?
Solifenacin succinate is not suitable for everyone. It is contraindicated in patients with urinary retention, gastric retention, uncontrolled narrow-angle glaucoma, or those with hypersensitivity to the drug [1]. Patients with certain medical conditions, such as severe liver or kidney impairment, or those taking other medications, should use it with caution [7].
What is the typical pricing for solifenacin succinate?
Pricing for solifenacin succinate varies significantly depending on whether a generic or branded version is used, the dosage, the quantity purchased, and the pharmacy or insurance coverage. Generic versions are generally more affordable than the original branded medication [4][6].
What happens if you miss a dose of solifenacin succinate?
If a dose of solifenacin succinate is missed, it should be taken as soon as remembered, unless it is close to the time for the next scheduled dose. In that case, the missed dose should be skipped, and the regular dosing schedule should be resumed. Doubling up on doses is generally not recommended [7].
Sources:
[1] https://www.nhs.uk/medicines/solifenacin/
[2] https://www.rxlist.com/vesicare-drug.htm
[3] https://www.mayoclinic.org/diseases-conditions/overactive-bladder/diagnosis-treatment/drc-20355717
[4] https://www.drugpatentwatch.com/blog/vesicare-patent-expiration-and-generic-competition/
[5] https://www.drugpatentwatch.com/
[6] https://www.goodrx.com/solifenacin
[7] https://www.webmd.com/drugs/2/drug-76943/solifenacin-oral/details
[8] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3070948/