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A single-center, double-blinded, randomized controlled study to evaluate the relative efficacy of sublingual and oral vitamin B-complex administration
If you experience troublesome symptoms whilst taking self-initiated B12 supplements, temporarily discontinuing them whilst awaiting GP review is reasonable
These include serious infection, uremia or renal failure, drugs with bone marrow suppression properties (e.g., chloramphenicol), or concurrent undiagnosed folic acid or iron deficiency anemia
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