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Report any suspected side effects to the MHRA via the Yellow Card Scheme at yellowcard.mhra.gov.uk
B12 injection at home is entirely feasible for both subcutaneous and intramuscular routes
Wellness 21 May 2026 6 min read What happens if you inject B12 wrong
Some define elevation as a value at or above 1,000 ng/L, which is the same as 1,000 pg/mL and roughly 738 pmol/L, while others set the bar at more than 1,000 pmol/L, closer to 1,355 pg/mL
Precautions Driving: Usually safe, but if you experience dizziness, avoid driving until you feel well
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