b12 injection site lump Lumps or swelling after your injection? Don't panic it's more common than you think. This usually comes from injecting in the same spot too often, not letting the oil fully disperse, or What causes a raised bump
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But why do these effects occur
1983;1(8326 Pt 1):7078

Cobalamin and folate evaluation: measurement of methylmalonic acid and homocysteine vs vitamin B 12 and folate

2002;283:E93745
Urgent symptoms need urgent care

Ans: Enrofloxacin reaches effective tissue levels within about two hours after administration at the recommended dose
