are b12 injections painful

https://media.licdn.com/dms/image/v2/D5610AQGfXkJCyEVVIw/image-shrink_800/B56ZzXS_MmH8Ak-/0/1773138605409?e=2147483647&v=beta&t=H70Mps8r0cOvlqSpBx7F4iasyKdACH9Oj4_DOiZpj94 Rohr, M Size:1000 mcg/ml - 10 ml (Pack of 3) Workarea: horse-vitamins-supplements Vitamin B12 3000mcg Injection Rx | PBS Animal Health

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