What is Nuedexta and what is it used for?
Nuedexta (dextromethorphan hydrobromide and quinidine hydrobromide) is a medication used to treat pseudobulbar affect (PBA), a neurological condition characterized by sudden, involuntary, and frequent episodes of laughing or crying [1].
Are there generic versions of Nuedexta available?
As of late 2023, there are no generic versions of Nuedexta on the market in the United States [2].
When does Nuedexta's patent protection end?
The primary patents for Nuedexta, held by Avanir Pharmaceuticals, are expected to expire in late 2027 or early 2028, though patent litigation can affect these dates [3]. DrugPatentWatch.com tracks these patent expirations, which are crucial for the potential entry of generic competitors [3].
Why haven't generic versions of Nuedexta been released yet?
The absence of generic Nuedexta is typical for many branded medications. Generic manufacturers typically wait for patent protections to expire before launching their versions to avoid infringement lawsuits. In some cases, companies may seek to extend market exclusivity through additional patents or regulatory exclusivities [3].
How much does Nuedexta cost?
Without generic competition, Nuedexta remains a brand-name drug with associated costs. Pricing can vary depending on insurance coverage, pharmacy, and patient assistance programs. Information on current pricing is best obtained from pharmacies or insurance providers [4].
What are the active ingredients in Nuedexta?
Nuedexta is a combination drug containing dextromethorphan hydrobromide and quinidine hydrobromide [1]. Quinidine helps to increase the levels of dextromethorphan in the body, allowing it to be effective at lower doses [5].
What are the side effects of Nuedexta?
Common side effects of Nuedexta can include dizziness, diarrhea, cough, and urinary tract infection. More serious side effects may occur, and patients should discuss these with their healthcare provider [6].
What is pseudobulbar affect (PBA)?
Pseudobulbar affect is a neurological disorder that affects how people express emotions. It is not a mood disorder but a symptom of underlying neurological conditions such as stroke, ALS, traumatic brain injury, and Alzheimer's disease. PBA can cause uncontrollable laughing or crying that is disproportionate or disconnected from the person's actual feelings [1].
How does Nuedexta work?
The exact mechanism by which Nuedexta works to treat PBA is not fully understood. However, it is believed that dextromethorphan acts on sigma-1 receptors and NMDA receptors in the brain, while quinidine inhibits the enzyme CYP2D6, which metabolizes dextromethorphan. This inhibition increases the bioavailability and duration of action of dextromethorphan [5].
What are the alternatives to Nuedexta for PBA?
While Nuedexta is the only FDA-approved medication specifically for PBA, other approaches may be used off-label or as part of a broader management strategy. These can include certain antidepressant medications, behavioral therapies, and speech therapy, depending on the underlying cause and the patient's specific symptoms [7].
Sources:
1. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/022540s015lbl.pdf
2. https://www.goodrx.com/nuedexta
3. https://drugpatentwatch.com/
4. https://www.goodrx.com/nuedexta
5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4131814/
6. https://www.nuedexta.com/
7. https://www.mayoclinic.org/diseases-conditions/pseudobulbar-affect/diagnosis-treatment/drc-20356183