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Other side effects that can occur include: Excessive sweat production Rapid weight gain Pain when breathing Shortness of breath when lying down Anxiety Increased or irregular heart rate Numbness, tingling or muscular weakness Increased thirst Urinary frequency B12 injections can also cause allergy symptoms immediately after administration, like difficulty breathing, a swollen throat, mouth, or swelling of the mouth, tongue or face
If you're unsure which category your reaction falls into, the simple rule: if the reaction stays at the injection site and gets better over time, keep going
( Epub 2016/01/10 )
How to Soothe Pain and Swelling A few simple tricks can make your injection experience much more comfortable
This was observed among participants in the high-dose group
