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Lifelong Vitamin B12 supplementation. Vitamin B12 (cyanocobalamin) deficiency generally presents in patients as fatigue, diarrhea and headaches but can also be the cause of cognitive changes (difficulty concentrating, even mild dementia). Pernicious anemia is a macrocytic anemia, therefore laboratory findings indicate an increased mean corpuscular volume (MCV), with a decreased hemoglobin. A positive Schilling test indicates that the B12 deficiency is due to a lack of intrinsic factor. Lifelong cyanocobalamin supplementation (either orally or via injections) is needed to treat pernicious anemia. A is incorrect. Folic acid deficiency anemia is another common type of macrocytic anemia. However, cognitive deficits are not typically seen with folic acid deficiency. Furthermore, a schilling test would be negative and the methylmalonic acid (MMA) would be normal, rather than elevated. C is incorrect. Iron deficiency anemia causes a microcytic anemia, characterized by a decreased MCV. D is incorrect. A Coomb’s test is used to detect autoimmune hemolysis that may be suspected in patients with normocytic anemia (anemia with an MCV in the normal range). E is incorrect. Corticosteroids and iron supplementation are indicated as treatment in hemolytic anemia.

RR = rate of an outcome occurring in an exposed group (treatment group/intervention group) divided by the rate of an outcome occurring in an unexposed group (control group) Ex: Relative Risk = Rate of UTI in patients taking drug XYZ / rate of UTI in patients not on drug XYZ

Metformin should be stopped when eGFR falls below 30. This is the only cutoff that is recommended for absolute discontinuing. If the eGFR falls between 30-44 while ontherapy, benefits and risks of discontinuing should be evaluated. New initiation is only recommended when eGFR >45.

Pt’s weight in Kg 76.4. 76.4 × [5 mcg/kg/min] = 381.18 mcg/min Concentration of the bag [400 mg/250 mL] = 1.6 mg/ml or 1600mcg 381.18 mcg × [1 mL/1600 mcg] = 0.2382 mL/ml 60 in × [0.0.2382 mL/min] = 14.29 mL in one hour