Brivaracetam

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Brivaracetam
Names
Pronunciation/ˌbrɪvəˈræsətəm/ BRIV-ə-RASS-ə-təm
Trade namesBriviact, Nubriveo, Brivazen, others
  • (2S)-2-[(4R)-2-oxo-4-propylpyrrolidin-1-yl] butanamide
Clinical data
Main usesEpilepsy (partial-onset seizures)[1]
Side effectsSleepiness, dizziness, tiredness, nausea[2]
Pregnancy
category
  • AU: B3
  • US: N (Not classified yet)
Routes of
use		By mouth, intravenous
External links
AHFS/Drugs.comMonograph
MedlinePlusa616027
Legal
License data
Legal status
  • AU: S4 (Prescription only)
  • US: Schedule V [3]
  • EU: Rx-only
  • In general: ℞ (Prescription only)
Pharmacokinetics
BioavailabilityNearly 100%
Protein binding≤20%
MetabolismHydrolysis by amidase, CYP2C19-mediated hydroxylation
Metabolites3 inactive metabolites
Elimination half-life≈9 hours
ExcretionKidneys (>95%)[3]
Chemical and physical data
FormulaC11H20N2O2
Molar mass212.293 g·mol−1
3D model (JSmol)
Specific rotation[α]D −60°
Melting point72 to 77 °C (162 to 171 °F)
  • O=C(N)[C@@H](N1C(=O)C[C@@H](CCC)C1)CC
  • InChI=1S/C11H20N2O2/c1-3-5-8-6-10(14)13(7-8)9(4-2)11(12)15/h8-9H,3-7H2,1-2H3,(H2,12,15)/t8-,9+/m1/s1 checkY
  • Key:MSYKRHVOOPPJKU-BDAKNGLRSA-N checkY

Brivaracetam, sold under the brand name Briviact among others, is a medication used to treat epilepsy, specifically partial-onset seizures.[1] It is used in people over the age of 3 together with other epilepsy medicines.[1] It may be taken by mouth or injected into a vein.[4]

Common side effects include sleepiness, dizziness, tiredness, and nausea.[2] Other side effects may include suicide, psychosis, angioedema, and anxiety.[2] Use in pregnancy may harm the baby.[2] How it works is unclear; however, may related to synaptic vesicle protein 2A.[4] It is chemically similar to levetiracetam.[4]

Brivaracetam was approved for medical use in the United States and Europe in 2016.[2][1] In the United Kingdom 4 weeks of medications costs the NHS about £130 as of 2021.[5] This amount in the United States is about 1,200 USD.[6]

Medical uses

Brivaracetam is used to treat partial-onset seizures with or without secondary generalisation, in combination with other antiepileptic drugs. No data are available for its effectiveness and safety in patients younger than 16 years.[7][8][9]

It is sometimes prescribed as an alternative to the drug's analogue levetiracetam to avoid neuropsychiatric adverse effects such as mood swings, anxiety, emotional lability, and depression.

Dosage

It is started at a dose of 25 to 50 mg twice per day, which may be increased up to 100 mg twice per day.[5]

Side effects

The most common side effects include sleepiness, dizziness, nausea and vomiting. More rarely, coordination problems and changes in behaviour can occur.[7][8]

Interactions

Coadministration of brivaracetam with carbamazepine may increase exposure to carbamazepine-epoxide, the active metabolite of carbamazepine, and could theoretically lead to reduced tolerability. Coadministration of brivaracetam with phenytoin may increase phenytoin levels. Coadministration of other antiseizure drugs are unlikely to affect brivaracetam exposure. Brivaracetam provides no added therapeutic benefit when administered in conjunction with levetiracetam that acts on the same protein.[10]

Pharmacology

Mechanism of action

Brivaracetam is believed to act by binding to the ubiquitous synaptic vesicle glycoprotein 2A (SV2A), like levetiracetam. but with 20-fold greater affinity.[11][12] There is some evidence that racetams including levetiracetam and brivaracetam access the luminal side of recycling synaptic vesicles during vesicular endocytosis. They may reduce excitatory neurotransmitter release and enhance synaptic depression during trains of high-frequency activity, such as is believed to occur during epileptic activity.[13]

Pharmacokinetics

Brivaracetam exhibits linear pharmacokinetics over a wide dose range, is rapidly and completely absorbed after oral administration, has an elimination half-life of seven to eight hours, and has plasma protein binding of less than 20%. It is extensively metabolized (>90%), primarily via hydrolysis of the acetamide group, and secondarily through hydroxylation mediated by the liver enzyme CYP2C19. The three major metabolites (hydroxy, acid, and hydroxyacid) are pharmacologically inactive. Brivaracetam is eliminated as urinary metabolites, with over 95% of a radioactive test dose recovered in the urine within 72 hours, including only 8.6% as unchanged brivaracetam.[14]

Pharmacogenetics

As noted above, brivaracetam is primarily metabolized by hydrolysis, via amidase enzymes, to an inactive metabolite. To a lesser extent, it is also metabolized by a minor metabolic pathway via CYP2C19-dependent hydroxylation. Individuals who have no CYP2C19 enzyme activity, "CYP2C19 poor metabolizers", will have a greater exposure to standard doses of brivaracetam. Because they are less able to metabolize the drug to its inactive form for excretion, they may have an increased risk of adverse effects. The most common adverse effects of brivaracetam therapy include sedation, fatigue, dizziness, and nausea.[15] The FDA-approved drug label for brivaracetam states that patients who are CYPC19 poor metabolizers, or are taking medicines that inhibit CYP2C19, may require a dose reduction.[3]

Chemistry

Levetiracetam, for comparison

Brivaracetam is the 4R-propyl analogue of the anticonvulsant levetiracetam.

History

Positive preliminary results from stage III trials were recorded in 2008,[16] along with evidence that it is around ten times more potent for the prevention of certain types of seizure in mouse models than its analogue levetiracetam.[17]

On 14 January 2016, the European Commission,[8] and on 12 May 2016, the U.S. Food and Drug Administration (FDA)[18] approved brivaracetam under the trade name Briviact. The Drug Enforcement Administration (DEA) issued an interim final rule[clarification needed] placing brivaracetam into schedule V of the Controlled Substances Act (CSA) effective 9 March 2017.[19] As of May 2016, brivaracetam is not approved in some other countries. It was approved in Australia in August 2016.[20] In Canada it was approved on 9 March 2016 under the trade name Brivlera.[21]

Legality

Australia

Brivaracetam is a schedule 4 substance in Australia under the Poisons Standard (February 2020).[22] A schedule 4 substance is classified as "Prescription Only Medicine, or Prescription Animal Remedy – Substances, the use or supply of which should be by or on the order of persons permitted by State or Territory legislation to prescribe and should be available from a pharmacist on prescription."[22]

References

  1. ↑ 1.0 1.1 1.2 1.3 "Briviact (in Italy: Nubriveo)". Archived from the original on 29 December 2021. Retrieved 11 January 2022.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 "DailyMed - BRIVIACT- brivaracetam tablet, film coated BRIVIACT- brivaracetam solution BRIVIACT- brivaracetam injection, suspension". dailymed.nlm.nih.gov. Archived from the original on 21 March 2021. Retrieved 11 January 2022.
  3. ↑ 3.0 3.1 3.2 "Briviact- brivaracetam tablet, film coated Briviact- brivaracetam solution Briviact- brivaracetam injection, suspension". DailyMed. 15 May 2018. Archived from the original on 21 March 2021. Retrieved 25 January 2019.
  4. ↑ 4.0 4.1 4.2 "Brivaracetam Monograph for Professionals". Drugs.com. Archived from the original on 26 July 2021. Retrieved 11 January 2022.
  5. ↑ 5.0 5.1 BNF 81: March-September 2021. BMJ Group and the Pharmaceutical Press. 2021. p. 326. ISBN 978-0857114105.
  6. ↑ "Briviact Prices, Coupons & Savings Tips - GoodRx". GoodRx. Retrieved 11 January 2022.
  7. ↑ 7.0 7.1 Briviact Drugs.com
  8. ↑ 8.0 8.1 8.2 "Briviact". European Medicines Agency. Archived from the original on 10 June 2016. Retrieved 30 May 2016.
  9. ↑ Bresnahan R, Panebianco M, Marson AG (March 2019). "Brivaracetam add-on therapy for drug-resistant epilepsy". The Cochrane Database of Systematic Reviews. 3: CD011501. doi:10.1002/14651858.CD011501.pub2. PMC 6437881. PMID 30920649.
  10. ↑ Rolan P, Sargentini-Maier ML, Pigeolet E, Stockis A (July 2008). "The pharmacokinetics, CNS pharmacodynamics and adverse event profile of brivaracetam after multiple increasing oral doses in healthy men". British Journal of Clinical Pharmacology. 66 (1): 71–75. doi:10.1111/j.1365-2125.2008.03158.x. PMC 2485265. PMID 18341673.
  11. ↑ Rogawski MA, Bazil CW (July 2008). "New molecular targets for antiepileptic drugs: alpha(2)delta, SV2A, and K(v)7/KCNQ/M potassium channels". Current Neurology and Neuroscience Reports. 8 (4): 345–352. doi:10.1007/s11910-008-0053-7. PMC 2587091. PMID 18590620.
  12. ↑ Haberfeld H, ed. (2015). Austria-Codex (in Deutsch). Vienna: Österreichischer Apothekerverlag.
  13. ↑ Rogawski MA (October 2016). "A New SV2A Ligand for Epilepsy". Cell. 167 (3): 587. doi:10.1016/j.cell.2016.09.057. PMID 27768878.
  14. ↑ Sargentini-Maier ML, Espié P, Coquette A, Stockis A (January 2008). "Pharmacokinetics and metabolism of 14C-brivaracetam, a novel SV2A ligand, in healthy subjects". Drug Metabolism and Disposition. 36 (1): 36–45. doi:10.1124/dmd.107.017129. PMID 17908923. S2CID 14972675.
  15. ↑ Dean L (2018). "Brivaracetam Therapy and CYP2C19 Genotype". In Pratt VM, McLeod HL, Rubinstein WS, et al. (eds.). Medical Genetics Summaries. National Center for Biotechnology Information (NCBI). PMID 29763212. Bookshelf ID: NBK500036. Archived from the original on 26 October 2020. Retrieved 28 October 2021.
  16. ↑ Rogawski MA (August 2008). "Brivaracetam: a rational drug discovery success story". British Journal of Pharmacology. 154 (8): 1555–1557. doi:10.1038/bjp.2008.221. PMC 2518467. PMID 18552880.
  17. ↑ Matagne A, Margineanu DG, Kenda B, Michel P, Klitgaard H (August 2008). "Anti-convulsive and anti-epileptic properties of brivaracetam (ucb 34714), a high-affinity ligand for the synaptic vesicle protein, SV2A". British Journal of Pharmacology. 154 (8): 1662–1671. doi:10.1038/bjp.2008.198. PMC 2518465. PMID 18500360.
  18. ↑ "FDA approves Briviact to treat partial onset seizures". U.S. Food and Drug Administration (FDA). 12 May 2016. Archived from the original on 23 April 2019. Retrieved 28 October 2021.
  19. ↑ Drug Enforcement Administration Department of Justice (May 2016). "Schedules of Controlled Substances: Placement of Brivaracetam Into Schedule V. Interim final rule, with request for comments". Federal Register. 81 (92): 29487–29492. PMID 27192732.
  20. ↑ "Australian Public Assessment Report for brivaracetam" (PDF). Therapeutic Goods Administration. 2017. Archived (PDF) from the original on 14 August 2021. Retrieved 28 October 2021.
  21. ↑ UCB Canada Inc. (29 July 2020). "Health Canada Approves BRIVLERA® (brivaracetam) to treat partial-onset seizures in pediatric epilepsy patients". Cision Canada. Archived from the original on 19 October 2021. Retrieved 28 October 2021.
  22. ↑ 22.0 22.1 Poisons Standard February 2020 Archived 2 March 2020 at the Wayback Machine. comlaw.gov.au

Further reading

External links

External sites:
Identifiers:
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