Axcer (Ticagrelor) Dosing: Twice Daily Administration
Axcer (ticagrelor) is given twice daily at a maintenance dose of 90 mg, not once daily. 1, 2, 3, 4, 5
Standard Dosing Regimen
The established dosing for ticagrelor in acute coronary syndromes is:
This twice-daily regimen is consistently recommended across all major guidelines including the 2012-2013 ACCF/AHA guidelines 1, 2, 3, the 2016 ESC guidelines 4, and the most recent 2025 ACC/AHA guidelines 5.
Why Twice Daily Matters
The twice-daily dosing requirement is a critical compliance consideration. Guidelines explicitly note that "issues of patient compliance may be especially important with twice-daily dosing regimen" 1, 3. This is a key differentiator from clopidogrel (75 mg once daily) and prasugrel (10 mg once daily), which may affect patient adherence in real-world practice.
Pharmacologic Basis
Unlike clopidogrel and prasugrel (which are prodrugs requiring conversion), ticagrelor is an active parent compound that provides reversible P2Y12 receptor inhibition 2, 3. The twice-daily dosing is necessary because:
- Onset of antiplatelet effect is rapid (significant effect within 30 minutes of loading) 3
- The reversible binding mechanism requires consistent dosing to maintain therapeutic effect
- Plasma levels decline between doses, necessitating twice-daily administration to sustain platelet inhibition
Special Dosing Considerations
While 90 mg twice daily is the standard maintenance dose for acute coronary syndromes, there is a 60 mg twice daily dose approved for extended dual antiplatelet therapy (beyond 12 months) in post-MI patients who have tolerated initial therapy 6, 7. However, this lower dose is still administered twice daily, not once daily.
Important: When used with ticagrelor, the recommended aspirin maintenance dose is specifically 81 mg daily (not higher doses) 1, 2, 3, 5. This is based on post-hoc analysis from the PLATO trial showing that aspirin doses ≤100 mg daily should always be used with ticagrelor 5.
Clinical Pitfalls to Avoid
- Do not confuse with clopidogrel or prasugrel dosing: These are once-daily medications; ticagrelor requires twice-daily dosing
- Emphasize adherence: The twice-daily requirement increases the risk of missed doses compared to once-daily alternatives
- Bleeding risk: Ticagrelor increases the risk of fatal intracranial hemorrhage compared to clopidogrel and should be avoided in patients with prior ICH 1, 3
- Surgery timing: Discontinue at least 5 days before elective surgery 1, 2, 3