Tenofovir alafenamide

Tenofovir alafenamide
Clinical data
Pronunciation/ˌtəˈnoʊfəvɪər ˌæləˈfɛnəmaɪd/
Trade namesVemlidy
Other namesGS-7340
AHFS/Drugs.comMonograph
License data
Pregnancy
category
Routes of
administration		By mouth
ATC code
Legal status
Legal status
Pharmacokinetic data
Protein binding~80%[6]
Elimination half-life0.51 hour
ExcretionFeces (31.7%), urine (<1%)
Identifiers
  • Isopropyl (2S)-2-[[[(1R)-2-(6-aminopurin-9-yl)-1-methyl-ethoxy]methyl-phenoxy-phosphoryl]amino]propanoate
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC21H29N6O5P
Molar mass476.474 g·mol−1
3D model (JSmol)
  • C[C@H](CN1C=NC2=C(N=CN=C21)N)OC[P@@](=O)(N[C@@H](C)C(=O)OC(C)C)OC3=CC=CC=C3
  • InChI=1S/C21H29N6O5P/c1-14(2)31-21(28)16(4)26-33(29,32-17-8-6-5-7-9-17)13-30-15(3)10-27-12-25-18-19(22)23-11-24-20(18)27/h5-9,11-12,14-16H,10,13H2,1-4H3,(H,26,29)(H2,22,23,24)/t15-,16+,33+/m1/s1
  • Key:LDEKQSIMHVQZJK-CAQYMETFSA-N
Tenofovir alafenamide fumarate, the salt used in drug formulations

Tenofovir alafenamide, sold under the brand name Vemlidy, is an antiviral medication used against hepatitis B and HIV. It is used for the treatment of chronic hepatitis B virus (HBV) infection in adults with compensated liver disease[8] and is given in combination with other medications for the prevention and treatment of HIV. It is taken by mouth.[6]

Tenofovir alafenamide is a nucleotide reverse transcriptase inhibitor and is a prodrug of tenofovir. It was developed by Gilead Sciences based on the protide technology of Chris McGuigan and is applied in the form of tenofovir alafenamide fumarate (TAF). Closely related to the commonly used reverse-transcriptase inhibitor tenofovir disoproxil fumarate (TDF), TAF has greater antiviral activity and better distribution into lymphoid tissues than that agent.[9][10] It was approved for use in the US for HIV in 2015,[11] and for hepatitis B in 2016.[12] Although the US Food and Drug Administration (FDA) has approved tenofovir alafenamide for manufacture as a generic medication,[13] it is not available.[14]

  1. ^ "Tenofovir alafenamide (Vemlidy) Use During Pregnancy". Drugs.com. 26 December 2018. Archived from the original on 9 July 2021. Retrieved 18 April 2020.
  2. ^ "Prescription medicines: registration of new chemical entities in Australia, 2016". Therapeutic Goods Administration (TGA). 21 June 2022. Retrieved 10 April 2023.
  3. ^ "Product Monograph: Vemlidy (tenofovir alafenamide) tablets" (PDF). Government of Canada: The Drug and Health Product Register. 20 August 2020. Archived (PDF) from the original on 10 June 2022. Retrieved 7 June 2022.
  4. ^ "Liver disease". Health Canada. 9 May 2018. Retrieved 13 April 2024.
  5. ^ "Vemlidy 25 mg film coated tablets - Summary of Product Characteristics (SmPC)". (emc). 8 September 2020. Archived from the original on 11 July 2021. Retrieved 12 November 2020.
  6. ^ a b c "Vemlidy- tenofovir alafenamide tablet". DailyMed. U.S. National Library of Medicine. 11 February 2020. Archived from the original on 9 July 2021. Retrieved 18 April 2020.
  7. ^ "Vemlidy EPAR". European Medicines Agency (EMA). 17 September 2018. Archived from the original on 13 July 2021. Retrieved 12 November 2020.
  8. ^ Childs-Kean LM, Egelund EF, Jourjy J (October 2018). "Tenofovir Alafenamide for the Treatment of Chronic Hepatitis B Monoinfection". Pharmacotherapy. 38 (10): 1051–1057. doi:10.1002/phar.2174. PMID 30120841. S2CID 52033420.
  9. ^ Eisenberg EJ, He GX, Lee WA (2001). "Metabolism of GS-7340, a novel phenyl monophosphoramidate intracellular prodrug of PMPA, in blood". Nucleosides Nucleotides Nucleic Acids. 20 (4–7): 1091–8. doi:10.1081/NCN-100002496. PMID 11562963. S2CID 24652157.
  10. ^ Markowitz M, Zolopa A, Ruane P, Squires K, Zhong L, Kearney BP, et al. (March 2011). GS-7340 demonstrates greater declines in HIV-1 RNA than tenofovir disoproxil fumarate during 14 days of monotherapy in HIV-1 infected subjects (PDF). 18th Conference on Retroviruses and Opportunistic Infections. Archived from the original (PDF) on 25 April 2012.
  11. ^ Cite error: The named reference Gilead was invoked but never defined (see the help page).
  12. ^ "FDA Approves Vemlidy (tenofovir alafenamide) for Chronic Hepatitis B in Adults". United States Department of Health and Human Services. 21 November 2016. Archived from the original on 11 October 2019. Retrieved 11 October 2019.
  13. ^ "First Generic Drug Approvals 2023". U.S. Food and Drug Administration (FDA). 30 May 2023. Archived from the original on 30 June 2023. Retrieved 30 June 2023.
  14. ^ "Gilead settles 5 more Descovy patent feuds, pushing copycats to its PrEP successor out to 2031". Fierce Pharma. 12 September 2022. Archived from the original on 30 June 2023. Retrieved 27 March 2024.