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If you're taking other medications, keep your healthcare provider informed to avoid any potential interactions
You may feel the noticeable effects for about one to two weeks, but traces of the vitamin can linger longer because your liver stores some of it
Treatment Timeline Vitamin B12 (cobalamin) deficiency is a common condition requiring prompt treatment to prevent irreversible complications
This may vary from twice weekly to once every 2-4 weeks (source: The basics of treatment It is not understood why certain patients require more frequent B12 treatment
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