Product Name

Prasugrel

CAS Number

150322-43-3

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Product Name:
Prasugrel
CAS Number:
150322-43-3
Indication:
Indicated in combination with acetylsalicylic acid (ASA) to prevent atherothrombotic events in patients with acute coronary syndrome (ACS) who are to be managed with percutaneous coronary intervention (PCI). May be used in patients with unstable angina (UA), non-ST elevation myocardial infarction (NSTEMI), ST-elevation myocardial infarction (STEMI) who are to be managed with PCI. Prasugrel is not recommended in patients 75 years of age or greater, those that weigh<60kg, and patients with a history of stroke or transient ischemic attack due to increased risk of fatal and intracranial bleeding.
Mode of Action:

Prasugrel is an thienopyridine which inhibits ADP receptors by irreversibly acting on the P2Y12 receptor on platelets. The active metabolite of prasugrel prevents binding of adenosine diphosphate (ADP) to its platelet receptor, impairing the ADP-mediated activation of the glycoprotein GPIIb/IIIa complex. Prasugrel is proposed to have a similar mechanism of action to clopidogrel.

Pharmacodynamics:

Prasugrel is a member of the thienopyridine class of ADP receptor inhibitors, like ticlopidine (trade name Ticlid) and clopidogrel (trade name Plavix). These agents reduce the aggregation (“clumping”) of platelets by irreversibly binding to P2Y12 receptors. Compared to clopidogrel, prasugrel inhibits adenosine diphosphate–induced platelet aggregation more rapidly, more consistently, and to a greater extent than do standard and higher doses of clopidogrel in healthy volunteers and in patients with coronary artery disease, including those undergoing PCI. The increased potency of prasugrel appears to be due to more efficient conversion to its active metabolite. However, it carries a higher risk of bleed compared to clopidogrel, which may be a result of its higher potency.

Metabolism:

Prasugrel is not detected in plasma following oral administration. It is rapidly hydrolyzed in the intestine to thiolactone by human carboxylesterase (hCE) 2. This intermediate is further metabolized to its active metabolite, R-138727, in a single step by cytochrome P450 enzymes in the liver (primarily CYP3A4 and CYP2B6 and to a lesser extent by CYP2C9 and CYP2C19). The active metabolite is further metabolized by S-methylation or cysteine conjugation to two inactive metabolites. Unlike clopidogrel, transformation of prasugrel to its active metabolite does not appear to be affected by cytochrome P450 polymorphisms.

Toxicity:

LD50 (rat) 1, 000 – 2, 000 mg/kg; LD50 (rabbit) > 1, 000 mg/kg

IUPAC:
5-[2-cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl]-4, 5, 6, 7-tetrahydrothieno[3, 2-c]pyridin-2-yl acetate
ATC:
B01AC22
PubChem:
6918456
DrugBank:
DB06209
Formula:
C20H20N1O3
Molecular Mass:
373.442
SMILES:
CC(=O)OC1=CC2=C(CCN(C2)C(C(=O)C2CC2)C2=CC=CC=C2F)S1
InChi:
InChI=1S/C20H20FNO3S/c1-12(23)25-18-10-14-11-22(9-8-17(14)26-18)19(20(24)13-6-7-13)15-4-2-3-5-16(15)21/h2-5,10,13,19H,6-9,11H2,1H3
General Reference:
General Reference:

 

  1. Dovlatova NL, Jakubowski JA, Sugidachi A, Heptinstall S: The reversible P2Y antagonist cangrelor influences the ability of the active metabolites of clopidogrel and prasugrel to produce irreversible inhibition of platelet function. J Thromb Haemost. 2008 May 15;. Pubmed
  2. Tagarakis GI: Ticagrelor and Prasugrel: Two Novel, Most-Promising Antiplatelet Agents. Recent Pat Cardiovasc Drug Discov. 2010 Sep 27. Pubmed
  3. Angiolillo DJ: The evolution of antiplatelet therapy in the treatment of acute coronary syndromes: from aspirin to the present day. Drugs. 2012 Nov 12;72(16):2087-116. doi: 10.2165/11640880-000000000-00000. Pubmed
  4. Jeong YH, Tantry US, Gurbel PA: Importance of potent P2Y receptor blockade in acute myocardial infarction: focus on prasugrel. Expert Opin Pharmacother. 2012 Aug;13(12):1771-96. doi: 10.1517/14656566.2012.704909. Epub 2012 Jul 12. Pubmed

 

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