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Why do I feel worse after a B12 injection? CoLaz How Long Do The Side Effects Of B12 Injections Last Why do I feel so bad after a B12 injection? How IV Therapy & Vitamin Injections Help Headaches SparkHealth I've had a migraine since Sept 4th. I took a B12 injection that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one Are B12 Shots Safe? Royal Palm Beach Medical Group
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