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If you ever experience a severe or urgent medical emergency , such as difficulty breathing or intense pain, go to the nearest emergency room or call 911
Serious side effects are extremely uncommon , especially with intramuscular (IM) and IV administration using clinically appropriate doses
A high dosage of B12 is around 500-1,000 mcg a day, either given via oral supplements or B12 injections
If youre new to the idea of vitamin injections, you might wonder why someone might choose this option over a daily supplement
Acute symptoms such as fatigue may improve relatively quickly, whereas neurological symptoms like paraesthesia (pins and needles) or cognitive difficulties typically require longer treatment courses
But the reconstituted solution should not be used beyond 28 days
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