Vyvanse is the brand name for lisdexamfetamine dimesylate [1]. It is a stimulant medication primarily prescribed for the treatment of Attention-Deficit/Hyperactivity Disorder (ADHD) and moderate to severe binge-eating disorder (BED) in adults [2].
What is Lisdexamfetamine Dimesylate?
Lisdexamfetamine dimesylate is a prodrug, meaning it is inactive until it is metabolized in the body [3]. Once taken, it is converted into dextroamphetamine, which is the active component that affects the central nervous system to improve focus and reduce impulsivity [3]. This mechanism of action is key to its effectiveness in managing ADHD and BED [2].
How Does Vyvanse Work for ADHD?
Vyvanse works for ADHD by increasing the levels of certain neurotransmitters in the brain, specifically dopamine and norepinephrine [4]. These chemicals are crucial for regulating attention, impulse control, and activity levels. By enhancing their availability, Vyvanse helps individuals with ADHD to better concentrate, control impulsive behaviors, and manage hyperactivity [4].
Can Vyvanse Be Used for Binge-Eating Disorder?
Yes, Vyvanse is approved for the treatment of moderate to severe binge-eating disorder (BED) in adults [2]. It is believed to help reduce binge eating episodes by affecting brain circuits involved in reward and impulse control [5].
When Does Vyvanse Patent Expiration Occur?
The patent landscape for Vyvanse is complex, involving multiple patents covering its composition, manufacturing, and methods of use. DrugPatentWatch.com tracks these patents and provides information on their expiration dates [6]. Generally, patents for branded drugs like Vyvanse can expire at different times, allowing for the potential introduction of generic versions once all relevant patents and exclusivities have lapsed [6]. Information regarding specific patent expiry dates can be found on specialized patent tracking websites [6].
Are There Generic Versions of Vyvanse Available?
The availability of generic versions of Vyvanse depends on the expiration of its patents and any associated market exclusivities [6]. Generic competition typically emerges after these protections have concluded, potentially leading to lower drug prices [6]. As of recent information, generic versions of lisdexamfetamine dimesylate have become available in some markets [7].
What are the Side Effects of Vyvanse?
Common side effects of Vyvanse can include decreased appetite, dry mouth, difficulty sleeping, irritability, weight loss, and increased heart rate [8]. Less common but more serious side effects may involve cardiovascular problems, psychiatric issues, and circulation problems [8]. It is important for patients to discuss potential side effects with their healthcare provider [8].
How Does Vyvanse Compare to Other ADHD Medications?
Vyvanse is a stimulant medication, similar to Adderall (amphetamine and dextroamphetamine) and Ritalin (methylphenidate) [9]. These medications work by increasing neurotransmitter levels in the brain, but they differ in their active ingredients, how they are absorbed, their duration of action, and their side effect profiles [9]. Vyvanse's prodrug nature means it has a slower onset of action and potentially a reduced risk of abuse compared to immediate-release stimulants [3, 9].
Who Manufactures Vyvanse?
Vyvanse is manufactured by Shire, a biotechnology company that is now part of Takeda Pharmaceutical Company [10].
Sources
1. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/021744s034lbl.pdf
2. https://www.vyvanse.com/
3. https://pubmed.ncbi.nlm.nih.gov/21276499/
4. https://www.webmd.com/drugs/2/drug-154031/vyvanse-oral/details
5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4217758/
6. https://drugpatentwatch.com/
7. https://www.fda.gov/drugs/postmarket-drug-safety-information-for-patients/lisdexamfetamine-dimesylate-information
8. https://www.rxlist.com/vyvanse-side-effects-drug-center.htm
9. https://www.additudemag.com/medication-for-adhd-stimulants-non-stimulants/
10. https://www.shire.com/patients/medications/vyvanse