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Shortness of breath after B12 Injection
My B12 was 118 pg/mL. I received Casinerve Plus (methylcobalamin 1500 mcg IM) in my buttock on Friday evening. From Saturday afternoon, I developed intermittent shortness of breath/air hunger. Last night it became quite severe with chest heaviness. Sometimes when I take repeated deep breaths, I feel dizzy. My SpO₂ and pulse have been normal, and BP has generally been normal, sometimes slightly low. I want to know whether this could be a reaction to the B12 injection or another cause, and whether I should avoid another injection and consider oral B12 or another formulation.
Answers (4)
If you have any rash, wheeze, facial swelling or throat swelling, hives it could be an anaphylaxis reaction. I don’t think it was an allergic reaction. If you are still having dyspnea get an ecg done. Sometimes dizziness can happen to vitamin b12 injection
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Dr. A Raja Prasanna Kumar
Pulmonologist
47 yrs exp
Hyderabad
Pl consult.
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Dr. Kirubanandam Arularasan
Respiratory Medicine
12 yrs exp
Thanjavur
I don't think so it's due to injection. Better consult with Pulmonologist with detailed history
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Dr. Vivek Gautam
Pulmonologist
12 yrs exp
Greater Noida
kindly connect
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.