Is Vitamin B12 Safe with Liraglutide?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Supplement with sublingual or intramuscular B12 if serum levels fall below 300 pg/mL. Screen annually for neuropathy symptoms and megaloblastic anemia in long-term users.
Why this interaction occurs
Liraglutide-induced delayed gastric emptying and hypochlorhydria reduce the cleavage of protein-bound B12 and diminish intrinsic factor availability, increasing risk of deficiency particularly in patients over 50 or on restricted diets.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 5,486 reports mentioning Liraglutide. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Liraglutide + 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
Related interactions
All Vitamin B12 interactions → · All Liraglutide interactions →
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