Is NAD Precursors (Nicotinamide Riboside) Safe with Gemcitabine?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Do not take NAD+ precursor supplements concurrently with gemcitabine without oncology approval. Inform your care team of all supplements.
Why this interaction occurs
Gemcitabine induces DNA damage and cancer cell apoptosis. Elevated NAD+ from nicotinamide riboside supplementation can hyperactivate PARP-1, an enzyme involved in DNA repair. Enhanced PARP activity may facilitate repair of gemcitabine-induced DNA lesions in cancer cells, contributing to chemotherapy resistance. This mechanism has been demonstrated in pancreatic and lung cancer cell line studies.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 57,693 reports mentioning Gemcitabine. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Gemcitabine + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.