Rajinder Bhardwaj, Beth Morris, Kyle Matschke, Richard Bertz, Robert Croop, Jing Liu

A Drug‐Drug Interaction Study to Evaluate the Impact of Rimegepant on OCT2‐ and MATE1‐Mediated Transport of Metformin in Healthy Participants

  • Pharmacology (medical)
  • Pharmaceutical Science
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AbstractRimegepant is a calcitonin gene‐related peptide receptor antagonist approved for migraine treatment. This phase 1, open‐label, single‐center, fixed‐sequence study evaluated the effect of rimegepant on the pharmacokinetics (PK) of metformin. Twenty‐eight healthy participants received metformin 500 mg twice daily from Days 1 to 4 and Days 7 to 10, and once daily on Days 5 and 11. Rimegepant, 75 mg tablet, was administered once daily from Days 9 to 12. At pre‐specified time points, plasma metformin concentration, serum glucose levels, and safety and tolerability were evaluated. A 16% increase in the area under the plasma metformin concentration‐time curve (AUC) for 1 dosing interval (AUC0‐τ,ss), a statistically insignificant increase in maximum and minimum steady‐state metformin concentration (Cmax,ss and Cmin,ss), and a decrease in metformin renal clearance were observed on Day 11 following metformin‐rimegepant coadministration compared with metformin alone; however, the changes were not clinically relevant. Additionally, coadministration of rimegepant with metformin did not induce clinically meaningful change in the maximum observed glucose concentration (Gmax) or AUCgluc compared with metformin alone. Overall, rimegepant and metformin coadministration did not result in clinically relevant changes in metformin PK, renal clearance, or the antihyperglycemic effects of metformin. Rimegepant is considered safe for use with metformin.

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