Apixaban Administration via Nasogastric Tube
Crushing apixaban tablets for administration through a Ryle's (nasogastric) tube does NOT result in loss of potency when properly prepared and administered into the stomach. 1, 2
Proper Administration Technique
For nasogastric/gastric feeding tube administration, crushed apixaban tablets should be suspended in 60 mL of water or D5W and delivered immediately. 1 The key technical details include:
- Crushed tablets remain stable in water and D5W for up to 4 hours 1
- Immediate delivery after suspension is recommended 1
- The tube must terminate in the stomach—bioavailability is significantly reduced if administered distal to the stomach 1
Bioavailability Evidence
The FDA label and multiple guidelines confirm that crushed apixaban maintains equivalent bioavailability to intact tablets when administered via nasogastric tube into the stomach. 2 Specifically:
- A crushed 5 mg apixaban tablet suspended in 60 mL D5W and delivered through a nasogastric tube produced exposure similar to that seen with a single oral 5 mg intact tablet 2
- Administration in crushed form via nasogastric tube does not alter bioavailability for apixaban 1
- When crushed tablets (10 mg as 2 × 5 mg) were suspended in 30 mL water, exposure was similar to intact tablets 2
Critical Caveat: Site of Administration
The location of drug delivery is crucial—apixaban exhibits region-dependent absorption and is absorbed primarily in the stomach and proximal small bowel. 1 The evidence shows:
- Apixaban is also partially absorbed in the colon, unlike other DOACs 1
- However, bioavailability is reduced if administered distal to the stomach 1
- Ensure the nasogastric tube tip is positioned in the stomach, not post-pyloric 1
Monitoring Considerations
Due to limited data on absorption via feeding tubes, consider checking a drug-specific anti-Xa level to ensure adequate absorption, particularly in high-risk situations. 1 This is especially important for:
- Patients with gastrointestinal tract surgery or resections 1
- Situations where therapeutic efficacy is critical 1
- Any uncertainty about tube positioning 1
Comparison with Other DOACs
Unlike dabigatran, which must not be administered through an enteral feeding tube (as opening capsules substantially increases bioavailability), apixaban is safe for crushed administration. 1 Rivaroxaban and edoxaban can also be crushed for tube administration, but each has specific requirements. 1
Alternative Formulation
While not widely available, an oral solution formulation of apixaban (0.4 mg/mL) has been developed and shows comparable exposure to tablet formulation. 1