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The duration of the effects varies by individual, depending on their health needs and lifestyles
[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)
Who actually needs B12 injections
These associations were independent of demographic, socioeconomic, lifestyle factors, use of medications that could have an effect on serum vitamin B12 levels, dietary supplement use and fasting time
That said, there are no known risks of taking Vitamin B in combination with blood pressure medication, as long as you are treating a vitamin deficit and not going above the recommended daily dose
In: Ziegler E, Filer L, eds
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