Overview
11 DESCRIPTION Ticagrelor tablets contains ticagrelor, a cyclopentyltriazolopyrimidine, inhibitor of platelet activation and aggregation mediated by the P2Y 12 ADP-receptor. Chemically it is (1 S ,2 S ,3 R ,5 S )-3-[7-{[(1 R ,2 S )-2-(3,4-difluorophenyl)cyclopropyl]amino}-5-(propylthio)-3 H -[1,2,3]-triazolo[4,5- d ]pyrimidin-3-yl]-5-(2-hydroxyethoxy)cyclopentane-1,2-diol.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Ticagrelor and its major metabolite reversibly interact with the platelet P2Y 12 ADP-receptor to prevent signal transduction and platelet activation. Ticagrelor and its active metabolite are approximately equipotent. 12.2 Pharmacodynamics The inhibition of platelet aggregation (IPA) by ticagrelor and clopidogrel was compared in a 6-week study examining both acute and chronic platelet inhibition effects in response to 20 μM ADP as the platelet aggregation agonist. The onset of IPA was evaluated on Day 1 of the study following loading doses of 180 mg ticagrelor or 600 mg clopidogrel. As shown in Figure 5, IPA was higher in the ticagrelor group at all time points.
Indications
- 1 INDICATIONS AND USAGE Ticagrelor is a P2Y 12 platelet inhibitor indicated to reduce the risk of cardiovascular (CV) death, myocardial infarction (MI), and stroke in patients with acute coronary syndrome (ACS) or a history of myocardial infarction (MI). For at least the first 12 months following ACS, it is superior to clopidogrel. Ticagrelor tablets also reduces the risk of stent thrombosis in patients who have been stented for treatment of ACS. ( 1.1 ) to reduce the risk of a first MI or stroke in patients with coronary artery disease (CAD) at high risk for such events.
Common Doses
- 180 mg
- 90 mg
- 60 mg
- 100 mg
Dosage
2 DOSAGE AND ADMINISTRATION ACS or History of MI Initiate treatment with 180 mg oral loading dose of ticagrelor tablets. Then administer 90 mg twice daily during the first year. After one year, administer 60 mg twice daily. ( 2.2 ) Patients with CAD and No Prior Stroke or MI Administer 60 mg ticagrelor tablets twice daily. ( 2.3 ) Acute Ischemic Stroke Initiate treatment with a 180 mg loading dose of ticagrelor tablets then continue with 90 mg twice daily for up to 30 days. ( 2.4 ) Use ticagrelor tablets with a daily maintenance dose of aspirin of 75 to 100 mg.
Black Box Warning
WARNING: BLEEDING RISK • Ticagrelor, like other antiplatelet agents, can cause significant, sometimes fatal bleeding ( 5.1 , 6.1 ). • Do not use ticagrelor tablets in patients with active pathological bleeding or a history of intracranial hemorrhage (4.1 , 4.2 ). •Do not start ticagrelor tablets in patients undergoing urgent coronary artery bypass graft surgery (CABG) ( 5.1 , 6.1 ). • If possible, manage bleeding without discontinuing ticagrelor tablets. Stopping ticagrelor tablets increases the risk of subsequent cardiovascular events ( 5.2 ).
Contraindications
- 4 CONTRAINDICATIONS • History of intracranial hemorrhage. ( 4.1 ) • Active pathological bleeding. ( 4.2 ) • Hypersensitivity to ticagrelor or any component of the product. ( 4.3 ) 4.1 History of Intracranial Hemorrhage Ticagrelor tablets are contraindicated in patients with a history of intracranial hemorrhage (ICH) because of a high risk of recurrent ICH in this population [see Clinical Studies ( 14.1 ) ,( 14.2 )]. 4.
Side Effects
- 6 ADVERSE REACTIONS The following adverse reactions are also discussed elsewhere in the labeling: •Bleeding [see Warnings and Precautions ( 5.1 )] •Dyspnea [see Warnings and Precautions ( 5.3 )] Most common adverse reactions (>5%) are bleeding and dyspnea. ( 5.1 , 5.3 , 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Dr. Reddy’s Laboratories Inc., at 1-888-375-3784 or FDA at 1-800-FDA-1088or www .fda.gov/medwatch. 6.
Interactions
- 7 DRUG INTERACTIONS • Avoid use with strong CYP3A inhibitors or CYP3A inducers. ( 7.1 , 7.2 ) • Opioids: Decreased exposure to ticagrelor. Consider use of parenteral anti-platelet agent. ( 7.3) • Patients receiving more than 40 mg per day of simvastatin or lovastatin may be at increased risk of statin-related adverse effects. ( 7.4 ) • Rosuvastatin plasma concentrations may increase. Monitor for statin-related adverse effects. ( 7.4 ) • Monitor digoxin levels with initiation of or any change in ticagrelor. ( 7.5 ) 7.