Eril (fasudil hydrochloride) vs Qalsody (tofersen)

Eril (fasudil hydrochloride) vs Qalsody (tofersen)

Eril (fasudil hydrochloride) is a rho-kinase inhibitor used primarily to treat cerebral vasospasm, which is often associated with subarachnoid hemorrhage, and it works by relaxing blood vessels to improve blood flow. Qalsody (tofersen), on the other hand, is an antisense oligonucleotide designed for the treatment of amyotrophic lateral sclerosis (ALS) in patients with a specific genetic mutation (SOD1), and it functions by reducing the production of a defective protein thought to contribute to the disease process. When deciding between these medications, it is crucial to consider the specific condition being treated, as Eril is aimed at vascular issues within the brain, whereas Qalsody targets the genetic component of ALS; they are not interchangeable and are used for very different medical indications.

Difference between Eril and Qalsody

Metric Eril (fasudil hydrochloride) Qalsody (tofersen)
Generic name Fasudil hydrochloride Tofersen
Indications Cerebral vasospasm, subarachnoid hemorrhage, chronic peripheral arterial occlusive disease Treatment of amyotrophic lateral sclerosis (ALS)
Mechanism of action Rho kinase inhibitor Antisense oligonucleotide
Brand names Eril Qalsody
Administrative route Intravenous Intrathecal
Side effects Headache, dizziness, hypotension, gastrointestinal disturbances Headache, back pain, fall, pain in extremity, arthralgia
Contraindications Hypersensitivity to fasudil or any component of the formulation Hypersensitivity to tofersen or any component of the formulation
Drug class Rho kinase inhibitor Antisense oligonucleotide
Manufacturer Asahi Kasei Pharma Biogen

Efficacy

Efficacy of Eril (Fasudil Hydrochloride) in ALS

Eril, known generically as fasudil hydrochloride, is a rho-kinase inhibitor that has been explored for its potential efficacy in the treatment of Amyotrophic Lateral Sclerosis (ALS), a progressive neurodegenerative disease. While Eril is not primarily approved for ALS, preclinical studies have suggested that rho-kinase inhibition can have neuroprotective effects. The drug's efficacy in ALS patients, however, has not been conclusively determined through large-scale clinical trials. Small studies and anecdotal reports may provide some insights, but these are not sufficient to establish Eril as a standard treatment for ALS.

It is important to note that the use of Eril for ALS would be considered off-label, and more robust clinical data would be required to fully understand its impact on disease progression and patient outcomes. Researchers continue to investigate the potential mechanisms by which rho-kinase inhibitors like Eril could provide therapeutic benefits for ALS, such as by improving neuronal survival or by modulating the inflammatory response within the central nervous system.

Efficacy of Qalsody (Tofersen) in ALS

Qalsody, with the active ingredient tofersen, is an antisense oligonucleotide designed to target and reduce the production of superoxide dismutase 1 (SOD1) protein, which is associated with a genetic form of ALS. The efficacy of Qalsody has been evaluated in clinical trials involving patients with SOD1-ALS. In these studies, Qalsody has demonstrated the ability to lower SOD1 protein levels, which is hypothesized to slow the progression of the disease in patients with this specific genetic mutation.

However, the clinical outcomes in terms of functional decline, survival, and quality of life for patients treated with Qalsody are still being thoroughly investigated. Early trial results have shown promise, but the full extent of the drug's efficacy in altering the course of ALS remains to be conclusively established. As with any investigational treatment, the benefits of Qalsody must be weighed against the potential risks and side effects in the context of this serious and life-limiting illness.

Regulatory Agency Approvals

Eril
  • Pharmaceuticals and Medical Devices Agency (PMDA), Japan
Qalsody
  • Food and Drug Administration (FDA), USA

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If Eril or Qalsody are not approved or available in your country (e.g. due to supply issues), you can access them via Everyone.org.

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