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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 Best Vitamin B12 Injection Site: Administering B12 Shots Botox for Migraines: How It Works, Side Effects & Injection Sites Headaches and exhaustion after B12 Pernicious Anaemi
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