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DOI: 10.1055/s-0037-1619239
Pharmacokinetics (PK) of nintedanib with add-on pirfenidone in patients with idiopathic pulmonary fibrosis (IPF): results from INJOURNEY
Authors
Publication History
Publication Date:
21 February 2018 (online)
Introduction:
In a small phase II trial in Japanese patients with IPF, there was a trend towards lower nintedanib exposure when nintedanib 150 mg bid was added to pirfenidone than when given alone.
Aim:
To explore the PK of nintedanib with add-on pirfenidone.
Methods:
After a 4 – 5 week run-in with nintedanib 150 mg bid, patients with IPF were randomised to open-label nintedanib 150 mg bid with add-on pirfenidone or nintedanib 150 mg bid alone for 12 weeks. In the combination group, patients received pirfenidone 267 mg tid from randomisation to week 1, 534 mg tid from week 1 to week 2, 801 mg tid from week 2. Pre-dose plasma trough concentrations were measured at baseline (for nintedanib) and at weeks 2 and 4 (for nintedanib and pirfenidone).
Results:
Pre-dose pirfenidone gMean (gCV%) concentrations were 1120 (122) and 1220 (91) ng/mL at weeks 2 and 4, respectively. Pre-dose plasma trough concentrations of nintedanib were similar at each time point, irrespective of whether nintedanib 150 mg bid was administered alone or with add-on pirfenidone 534 mg or 801 mg tid (table). Moderate to high variability was observed in both groups.
| Nintedanib 150 mg bid alone | Nintedanib 150 mg bid with add-on pirfenidone 534 mg or 801 mg tid* † | |||
| N | gMean (gCV%) | N | gMean (gCV%) | |
| Pre-dose concentration of nintedanib (ng/mL) | ||||
| Baseline* | 46 | 7.08 (56.0) | 46 | 7.65 (72.5) | 
| Week 2 | 41 | 7.25 (52.7) | 35 | 8.17 (69.8) | 
| Week 4 | 44 | 5.92 (73.5) | 30 | 7.13 (63.9) | 
| *Nintedanib 150 mg bid alone at baseline. †Pirfenidone dose titration: 267 mg tid from randomisation to week 1, 534 mg tid from week 1 to week 2. 801 mg tid from week 2. gCV, geometric coefficient of variation; gMean, geometric mean. | ||||
Conclusion:
In patients with IPF, nintedanib plasma trough concentrations were similar when nintedanib was administered alone or with add-on pirfenidone; however, data from a dedicated drug-drug interaction study are needed to draw robust conclusions.
 
     
      
    