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Evidence level: Contradicted by the cited record Sources: Development & validation of LC-MS/MS assay for 5-amino-1-methyl quinolinium in rat plasma: Application to pharmacokinetic and oral bioavailability studies., ClinicalTrials.gov exact-name search, accessed 2026-07-12 How to read this: Rat bioavailability does not validate a human formulation

[9] A related cause is reduced stomach acid production with age or from long-term use of proton-pump inhibitors, [10] H 2 blockers, or other antacids, [11] and interaction with metformin

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