Repeated grapefruit intake increased midazolam exposure in healthy volunteers, while lingonberry powder did not reproduce the enzyme induction previously suggested in mice.
What the source reports
Eleven volunteers completed water, nine-day lingonberry and three-day grapefruit pretreatments followed by oral enzyme probes. Grapefruit increased midazolam AUC and altered several metabolic ratios. The study also found evidence of inhibition beyond CYP3A4. Lingonberry did not meaningfully induce the major tested CYP pathways in these human conditions.
Limits and uncertainty
The sample was small and the food regimens and oral probe doses were specific. These results do not describe every serving, product or chronic dietary pattern. A probe exposure difference does not directly measure sedation, and an animal enzyme observation cannot be assumed to predict a human interaction.
Implications for forensic review
For an interaction history, ask what product was consumed, how often and relative to medication administration. Preserve the distinction between oral bioavailability and systemic clearance. This experiment supports a plausible food–drug interaction question, but cannot calculate an individual’s impairment or identify grapefruit as the cause from a concentration alone.
Source and related reading
Source reviewed: Repeated Intake of Grapefruit Juice Inhibits CYP2B6 CYP2C9 CYP2C19 and CYP3A4 while Lingonberry Powd (PMC12997508). Forensic applications above are interpretive analysis of the supplied paper.
Related reading: Unchanged Midazolam Exposure Does Not Establish Absence of Every Lemborexant Interaction.
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