Perampanel

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Perampanel
Skeletal formula of perampanel
Ball-and-stick model of the perampanel molecule
Clinical data
Trade namesFycompa
Other namesE2007
AHFS/Drugs.comMonograph
MedlinePlusa614006
License data
Pregnancy
category
  • AU: B3
Routes of
administration		By mouth
Drug classAnticonvulsant
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability116%[9]
Protein binding95–96%
MetabolismLiver, mostly via CYP3A4 and/or CYP3A5
Elimination half-life105 hours, 295 hours (moderate hepatic impairment)
Excretion70% faeces, 30% urine
Identifiers
  • 5'-(2-cyanophenyl)-1'-phenyl-2,3'-bipyridinyl-6'(1H)-one
JSmol)
  • N#Cc2ccccc2-c1cc(-c4ncccc4)cn(c1=O)-c3ccccc3
  • InChI=1S/C23H15N3O/c24-15-17-8-4-5-11-20(17)21-14-18(22-12-6-7-13-25-22) 16-26(23(21)27)19-9-2-1-3-10-19/h1-14,16H ☒N
  • Key:PRMWGUBFXWROHD-UHFFFAOYSA-N ☒N

  • as hydrate: InChI=1S/4C23H15N3O.3H2O/c4*24-15-17-8-4-5-11-20(17)21-14-18(22-12-6-7-13-25-22)16-26(23(21)27)19-9-2-1-3-10-19;;;/h4*1-14,16H;3*1H2
  • Key:PDWMJDKMSASBNE-UHFFFAOYSA-N
 ☒NcheckY (what is this?)  (verify)

Perampanel, sold under the brand name Fycompa, is an

non-competitive antagonist of AMPA receptors.[11]

The drug label has a

oral contraceptives by about 40%.[8] Women who may get pregnant should not take it as studies in animals show it may harm a fetus.[12] Perampanel is liable to be abused; very high doses produced euphoria responses similar to ketamine.[8] It is designated as a Schedule III controlled substance by the Drug Enforcement Administration.[8]

As of August 2016 perampanel had been studied and development discontinued in migraine, multiple sclerosis, neuropathic pain, and Parkinson's disease.[13]

Medical uses

Perampanel is used in addition to other drugs to treat

tonic-clonic seizures for people older than twelve years.[8]

A 2016 review found it effective for both indications but due to the newness of the drug was unable to describe its optimal role in the treatment of epilepsy relative to other drugs.[10] A 2014 review of the probability of added benefit of perampanel to the standard of care was unable to come to any conclusions, as no trial conducted by Eisai compared perampanel to a drug within the standard of care, but only to placebo.[14]

Contraindications

Based on animal data, perampanel may cause fetal harm;[8] it is not recommended for women of child-bearing age not taking contraception.[12]

People with severe liver impairment or severe kidney disease, including those on dialysis, should not take perampanel.[8]

Side effects

Perampanel's label has a

black box warning noting that some people taking the drug have undergone serious psychiatric and behavioral changes. These events occurred in people who had no history of such issues, as well as people who had such a history. The psychiatric changes included mood changes like euphoric mood, anger, irritability, aggression, belligerence, agitation, and anxiety, as well as psychosis (acute psychosis, hallucinations, delusions, paranoia) and delirium (delirium, confusional state, disorientation, memory impairment). Behavioral changes included physical assault and homicidal ideation and/or threats.[8]

Other serious side effects include suicidal thoughts or behavior (like all anti-epileptic drugs), dizziness and gait disturbance, somnolence and fatigue, risk of falls, and increased risk of seizures if the drug is quickly withdrawn.[8]

In clinical trials, dizziness, somnolence, vertigo, aggression, anger, loss of coordination, blurred vision, irritability, and slurred speech were the side effects that most commonly led people to leave the trial.[8]

Perampanel is liable to be abused: very high doses produced euphoria responses and dissociative effects similar to ketamine, although subjects liked it less and had experienced it more negatively than ketamine.[8] It is designated as a Schedule III controlled substance by the Drug Enforcement Administration.[8] A study of dependence in rats found withdrawal symptoms when the drug was removed; dependence in humans wasn't studied well enough to make generalizations as of April 2016.[8] There is limited experience with overdose.[8]

Interactions

Perampanel reduced the effectiveness of levonorgestrel

St. John's wort is not recommended. Use of perampanel with CNS depressants like alcohol may increase the effect of the CNS depressant.[8]

Pharmacology

Perampanel is a selective

non-competitive antagonist of AMPA receptors, the major subtype of ionotropic glutamate receptors.[15][16] It was the first drug of this class approved for epilepsy.[11]

Whole-cell voltage clamp studies have demonstrated that perampanel is a negative allosteric AMPA receptor antagonist.[17] Perampanel caused a slow (τ~1 s at 3 μM), concentration-dependent inhibition of AMPA receptor currents. The rates of block and unblock of AMPA receptor currents were 1.5×105 M−1 s−1 and 0.58 s−1, respectively. Perampanel did not affect NMDA receptor currents. The extent of block (IC50, 0.56 μM) was similar at all agonist concentrations, demonstrating a noncompetitive blocking action. Parampanel did affect AMPA receptor desensitization, or the ratio of peak to late response to rapid application of AMPA.[17] Perampanel is a selective negative allosteric AMPA receptor antagonist of high-affinity and slow blocking kinetics, and is not use-dependent.

Perampanel has a prolonged terminal half-life in humans of approximately 105 hours. The drug is 95% bound to plasma protein. Its primary route of metabolism is by

P450 enzymes. About 70% of the dose is excreted in the feces and 30% in the urine; less than 2% of the dose is excreted unchanged into the urine.[12]

Chemistry

Perampanel's chemical formula is 2-(2-oxo-1-phenyl-5-pyridin-2-yl-1,2-dihydropyridin-3-yl)benzonitrile; it has a bipyridine core structure that sets it apart from other AMPA receptor antagonists.[16]

The tablets contain lactose monohydrate, low substituted hydroxypropyl cellulose, povidone, microcrystalline cellulose, magnesium stearate, hypromellose, polyethylene glycol, talc, and titanium dioxide in addition to the API; the oral suspension contains sorbitol, microcrystalline cellulose, carboxymethylcellulose sodium, poloxamer, simethicone, citric acid, sodium benzoate and purified water in addition to the API.[8]

History

It was approved for marketing under the brand name Fycompa by the European Medicines Agency (EMA) in July 2012,[12] and as of July 2016, was approved as an adjunct treatment of partial-onset seizures with or without secondarily generalised seizures in people with epilepsy older than twelve years and as an adjunct treatment of primary generalised tonic-clonic seizures for people older than twelve years who have idiopathic generalised epilepsy.[12]

It was first approved by the FDA under the same brand name in October 2012, and then in June 2015, for the same uses as those in the European Union; it was one of four new drugs for epilepsy approved between 2010 and 2016, along with clobazam (Onfi), retigabine (Potiga), and eslicarbazepine acetate (Aptiom).[11]

Research

As of August 2016, perampanel had been studied and development discontinued in migraine, multiple sclerosis, neuropathic pain, and Parkinson's disease.[13]

References

  1. FDA
    . Retrieved 22 October 2023.
  2. ^ "AusPAR: Perampanel hemisesquihydrate". Therapeutic Goods Administration (TGA). 10 May 2021. Retrieved 12 June 2021.
  3. ^ "TGA eBS - Product and Consumer Medicine Information Licence".
  4. ^ "Fycompa". NPS MedicineWise. 15 July 2021. Retrieved 19 February 2022.
  5. ^ "Prescription medicines: registration of new chemical entities in Australia, 2014". Therapeutic Goods Administration (TGA). 21 June 2022. Retrieved 10 April 2023.
  6. ^ Anvisa (31 March 2023). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 4 April 2023). Archived from the original on 3 August 2023. Retrieved 16 August 2023.
  7. ^ "Product monograph brand safety updates". Health Canada. February 2024. Retrieved 24 March 2024.
  8. ^ a b c d e f g h i j k l m n o p q r s "Fycompa- perampanel tablet Fycompa- perampanel suspension". DailyMed. Retrieved 12 June 2021.
  9. ^ Yang X, Wu TC, Yuxin MA, Lee JY, Bhattaram VA, Mehta MU. "U.S. FDA Clinical Pharmacology Review. Fycompa (perampanel)" (PDF): 25. {{cite journal}}: Cite journal requires |journal= (help)
  10. ^
    S2CID 14176469
    .
  11. ^
    S2CID 9090302
    .
  12. ^ a b c d e EMA Summary of Product Characteristics. "Index pagel". 17 September 2018.
  13. ^ a b "Perampanel". AdisInsight. Retrieved 29 August 2016.
  14. PMID 26677496
    .
  15. S2CID 15246804
    .
  16. ^
    PMID 23480152
    .
  17. ^
    S2CID 7519077
    .
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