Vitamin B 12 Injection, 3,000 mcg mL at Tractor Supply Co Vetoquinol Vitamin B12 5000 mcg mL Supplement Injectable Solution B12 Injections for Energy: Benefits and How It Works AZ IV Medics Vitamin B12 Injections: What You Need To Know The 'magic' pink injection., Injecting Vitamin B12, mixed with whatever maintence injection you choose (most commonly used with corticosteroids), is often used to combat muscle soreness, spasms, or VITAMIN B12 INJECTION 1000 mcg mL