Oseltamivir phosphate

Catalog No. size PriceQuantity
M7209-2 2mg solid $80
M7209-10 10mg solid $320



Product Information

Oseltamivir phosphate is an antiviral medication used to treat influenza A and influenza B (flu), and to prevent flu after exposure. The medication is taken orally. The Infectious Disease Society of America, the United States' Centers for Disease Control and Prevention (CDC), and the United Kingdom's National Institute for Health and Care Excellence recommend the use of oseltamavir for people who have complications or are at high risk for complications who present within 48 hours of first symptoms of infection. They recommend its use to prevent infection in at-risk people but not the general population. The CDC recommends that clinicians use their discretion to treat those at lower risk who present within 48 hours of first symptoms of infection.


Chemical Formula: C16H31N2O8P


Exact Mass: 312.405


Molecular Weight: 410.3997


Elemental Analysis: C, 46.83; H, 7.61; N, 6.83; O, 31.19; P, 7.55









Chemical Name:

ethyl(3R,4R,5S)-4-acetamido-5-amino-3-pentan-3-yloxycyclohexene-1-carboxylate;phosphoric acid


InChi Key:



InChi Code: InChI=1S/C16H28N2O4.H3O4P/c1-5-12(6-2)22-14-9-11(16(20)21-7-3)8-13(17)15(14)18-10(4)19;1-5(2,3)4/h9,12-15H,5-8,17H2,1-4H3,(H,18,19);(H3,1,2,3,4)/t13-,14+,15+;/m0./s1


Smiles Code:




Technical Data:


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001


In Vitro

Oseltamivir phosphate (OP) is a prodrug that is readily absorbed from the gastrointestinal tract after oral administration and is extensively converted predominantly by hepatic esterases to Oseltamivir carboxylate (OC). Oseltamivir phosphate is a widely used anti-influenza sialidase inhibitor. The metabolic activity of CMA07 and CMT-U27 cell lines is significantly decreased with 305 μM Oseltamivir phosphate treatment (p=0.005 and p<0.0001 respectively) using One Way ANOVA testes. In contrast, no statistically significant alterations are observed with 0.305 μM (p=0.9781), 3.05 μM (p=0.7436) and 30.5 μM (p=0.9623) of Oseltamivir phosphate treatments when compare with control cells. Finally, to assess the effect of Oseltamivir phosphate on CMA07 and CMT-U27 programmed cell death, and given that 305 μM Oseltamivir phosphate treatment impaired cell metabolic activity, a programmed cell death measurement is performed with the TUNEL assay. Twenty-four hour Oseltamivir phosphate treatment, specifically at 305 μM, significantly increases CMA07 (p=0.001) and CMT-U27 (p=0.0002) DNA fragmentation, suggesting promotion of programmed cell death, when compare with lower Oseltamivir concentrations, or with PBS.


In Vivo

Oseltamivir phosphate-treated mice present significantly more inflammatory infiltrate in primary tumors (p=0.01). Ki-67 antigen and caspase-3 protein are used to assess CMT-U27 xenograft tumor cell proliferation and apoptosis respectively. Virtually no differences are found in Ki-67 and caspase 3 (p=0.2) expression between Oseltamivir-treated and non-treated mice.





  1. Esposito S, Principi N. Oseltamivir for influenza infection in children: risks and benefits. Expert Rev Respir Med. 2016;10(1):79-87. doi: 10.1586/17476348.2016.1126182. Epub 2015 Dec 19. Review. PubMed PMID: 26616633.


  1. Beigi RH, Pillai VC, Venkataramanan R, Caritis SN. Oseltamivir for the treatment of H1N1 influenza during pregnancy. Clin Pharmacol Ther. 2015 Oct;98(4):403-5. doi: 10.1002/cpt.179. Epub 2015 Jul 22. Review. PubMed PMID: 26108913.


  1. Dobson J, Whitley RJ, Pocock S, Monto AS. Oseltamivir treatment for influenza in adults: a meta-analysis of randomised controlled trials. Lancet. 2015 May 2;385(9979):1729-37. doi: 10.1016/S0140-6736(14)62449-1. Epub 2015 Jan 30. Review. Erratum in: Lancet. 2015 May 2;385(9979):1728. Lancet. 2015 May 2;385(9979):1728. PubMed PMID: 25640810.


  1. Wagner J, Abdel-Rahman SM. Oseltamivir-warfarin interaction in hypoplastic left heart syndrome: case report and review. Pediatrics. 2015 May;135(5):e1333-6. doi: 10.1542/peds.2014-2578. Review. PubMed PMID: 25917992.


  1. McQuade B, Blair M. Influenza treatment with oseltamivir outside of labeled recommendations. Am J Health Syst Pharm. 2015 Jan 15;72(2):112-6. doi: 10.2146/ajhp140390. Review. PubMed PMID: 25550133.


Products are for research use only. Not for human use.

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