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Monitoring of vitamin B-12 nutritional status in the United States by using plasma methylmalonic acid and serum vitamin B-12

Medications and supplements A metallic taste in the mouth is a common side effect of certain medications, such as antibiotics ( metronidazole , clarithromycin , tetracycline ), blood pressure medications ( captopril ), gout medicines ( allopurinol ), diabetes medications ( metformin ), glaucoma medicines ( methazolamide ), and psychiatric drugs ( lithium )

2010 Mar;16(3):BR81-88

For the most consistent results, we recommend taking oral BPC-157 with only a glass of plain water and waiting 30-60 minutes before consuming any other beverage