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From Nutrition and Healthy Eating Resources Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA

If the solution stays cloudy, contains floating particles, or has changed color, discard the vial do not inject

Safe Preparation for Injectable Medications: Ideal for medications requiring sterile water as a diluent

Potential Risks and Side Effects of B12 Injections Whilst B12 injections are generally considered safe due to the vitamin's water-soluble nature (excess is excreted renally), several adverse effects and risks warrant consideration