But here are some general guidelines: Severe deficiencies: Daily shots for 1 week, then weekly shots until levels normalize Moderate deficiencies: Weekly shots until the deficiency is corrected Maintenance dosing : Monthly shots to keep B12 levels optimal Its definitely possible to take B12 shots too often
These can include rapid heartbeat, chest pain, confusion, muscle cramps and weakness, hives, skin rashes, and difficulty breathing or swallowing [1]
Rare but serious: allergic reaction (hives, trouble breathing, face swelling) call 911
It typically presents as macrocytic megaloblastic anemia and neurological impairments, including sensory and motor disfunctions, predominantly in the lower extremities, ataxia, and in more advanced stages cognitive decline progressing to dementia, as well as psychiatric disturbances (Sanjay et al., 2022
(More information) Severe deficiency in either folate or vitamin B 12 can lead to megaloblastic anemia, which causes fatigue, weakness, and shortness of breath