giving b12 injection in arm How to Use These 4 IM Spots Safely How to self-inject intramuscular vitamin

As to the aches and pains, breathlessness etc, this could be due to B12 needing potassium to build RBC, so I would check out low potassium symptoms and eat a banana or maybe two until you have fathomed it out

For Medicare patients with ESRD on dialysis, anemia is commonly managed with ESA therapy (J0885 Epoetin alfa, J0881 Darbepoetin)

FR- is also present in the choroid plexus, which has the important function of supplying folate to the central nervous system (76, 77)

For example, those with high blood pressure, heart problems, skin conditions, blood disorders, gout and low potassium levels should use vitamin B12 with caution and may want to consider talking to a trusted health care practitioner before starting supplementation