getting b12 injections How Often Can I Take Injections? Do You Need a Prescription

Wellness 22 May 2026 6 min read Why do I feel worse after my B12 injection

Simply telling patients to take tablets in the hope that they will absorb some of the B12 is based on dubious research and will force patients to by-pass their doctor

Loading phase: If you are low, treatment often starts with a series of injections (for example, once a week for several weeks) to replenish your body's stores

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Using a fresh, sterile alcohol wipe, clean the injection site by gently wiping in a spiral motion from the center outward, being careful not to go back over already clean areas

You may experience fatigue, shortness of breath, pale skin, weakness, or tingling in your hands and feet