b12 methylcobalamin 1000 mcg injection Cyanocobalamin (B12) 1000mcg/mL 30mL MDV Cyanocobalamin is a form of vitamin B12 Methylcobalamin Injection 1000MG, 2 ml,
Description
Headache or dizziness during the first few treatments

Your lack of energy even after eating nutritious food and exercising requires additional investigation

Lidocaine HCl Injection is not approved for this use (see WARNINGS and DOSAGE & ADMINISTRATION)

The treatment, in this case, usually follows by means of having daily injections for a week or so, then injections every few days for a month, after which maintenance doses are usually given every one to two months for life

Vitamin B12 is a water-soluble vitamin that maintains nerve and brain health, while also aiding in red blood cell production (via Healthline)