b12 injections generic name Compounded Vitamin B-Complex Injection Cyanocobalamin (Vitamin B12) Injection is sold as an FDA approved generic drug Cyanocobalamin: Package Insert / Prescribing
Description
Campagna R, et al

MIC B12 injections may be a good option for those with B12 deficiency, as well as those with certain medical conditions that may benefit from increased B12 levels

Don't stop that - you'll feel terrible

It might take some time for your energy levels to fully recover
Existing bald areas may not fully regrow with medication alone
