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Pernicious anemia occurs more commonly in people who already have diseases that are linked to immune-system abnormalities, such as Graves disease, hypothyroidism (under-functioning thyroid gland), thyroiditis (inflammation of the thyroid), vitiligo, and Addison's disease (adrenocortical insufficiency)

So, soon after administration, the blood level of diazepam rapidly falls until equilibrium is reached between blood and lipid compartments

However, mixing alcohol and Advil increases your risk of liver issues and gastrointestinal bleeding

2020 Mar;9(Suppl 2):S149-S159

In addition to fatigue, a deficiency of B12 can lead to other symptoms like pale skin, headaches, depression, gastrointestinal problems, difficulty concentrating, decreased mental function, mouth and tongue pain or inflammation, and paresthesia in your hands and feet