These include local irritation or redness at injection sites, mild headaches or dizziness, and occasional fatigue or nausea
Drug Metab Rev 1998, 30 (2), 245275
Initial signs include a slight loss of fullness in the cheeks and a more defined jawline
For 2015, the American Medical Association (AMA) has revised previous joint (or bursa) aspiration/injection codes (which continue to categorize joints by size) to specify without ultrasound guidance, while adding codes to describe the same procedures with ultrasound guidance (revised text is underlined): 20600 Arthrocentesis, aspiration and/or injection, small joint or bursa (eg, fingers, toes)
You need to supplement with a daily multivitamin as well as folic acid when you start on B12