Why is Horizant So Expensive?
Horizant's pricing is influenced by several factors, including its development costs, manufacturing complexity, and the value it provides to patients. The drug is used to treat moderate-to-severe primary restless legs syndrome (RLS) and post-herpetic neuralgia (PHN) [1].
What is Horizant Made Of?
Horizant is an extended-release formulation of gabapentin enacarbil [2]. Gabapentin enacarbil is a prodrug of gabapentin, meaning it is converted into gabapentin in the body. This formulation is designed to release the active ingredient over a longer period, potentially allowing for less frequent dosing compared to immediate-release gabapentin [3].
When Does Horizant's Patent Protection End?
Information regarding the specific patent expiry dates for Horizant is not publicly available in the provided context. DrugPatentWatch.com tracks patent information for pharmaceuticals, which can provide details on patent status and expiry [4].
Who Else Makes Similar Treatments for Restless Legs Syndrome?
Several other medications are available for treating restless legs syndrome. These include dopamine agonists like pramipexole and ropinirole, as well as alpha-2 delta ligands like gabapentin and pregabalin [5]. Gabapentin itself, without the enacarbil formulation, is available as a generic medication, which typically results in lower costs [3].
How Does Horizant Compare to Generic Gabapentin?
Horizant is a specific formulation of gabapentin enacarbil, designed for extended release. While generic gabapentin is also used for RLS, it is typically an immediate-release formulation. The extended-release mechanism of Horizant may offer benefits such as sustained symptom relief and potentially improved adherence due to less frequent dosing [3]. However, generic gabapentin is generally less expensive than branded medications like Horizant [3].
What Are the Risks or Side Effects Associated with Horizant?
Common side effects of Horizant include dizziness, fatigue, somnolence, and nausea [1]. More serious risks can include suicidal behavior and ideation, as well as hypersensitivity reactions [1]. Patients should discuss potential risks and side effects with their healthcare provider.
How Does Horizant Work?
The active component of Horizant, gabapentin enacarbil, is converted to gabapentin in the body. Gabapentin is thought to reduce the excitability of nerve cells by affecting calcium channels [6]. While the exact mechanism for treating RLS and PHN is not fully understood, gabapentin's action on the central nervous system is believed to be responsible for its therapeutic effects [6].
Sources:
[1] https://www.horizant.com/
[2] https://www.drugpatentwatch.com/drugs/horizant
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3843121/
[4] https://www.drugpatentwatch.com/
[5] https://www.mayoclinic.org/diseases-conditions/restless-legs-syndrome/diagnosis-treatment/drc-20377174
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4736337/