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Vitamin A mechanism of action
- essential for vision
- needed for normal growth and development
- maintenance of bones, teeth, reproduction, integrity of mucosal and epithelial surfaces
- cholesterol and steroid synthesis
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Vitamine A Toxicity symptoms
- irritability, drowsiness, vertigo, delirium, coma, vomiting diarrhea
- increased intracranial pressure in infants
- peeling of skin and erythema
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Vitamin D Mechanism of Action
- regulate absorption and utilization of calcium and phosphorus
- extraction of calcium from bone and increase absorption from the stomach
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Vitamin D deficiency
tetany and osteomalacia
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Vitamin D toxicity
hypertension
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Vitamin E mechanism of action
- protect polyunsaturated fatty acids
- antioxidant properties
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Vitamin K mechanism of Action
essential for synthesis of blood coagulation factors
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Vitamin B1 (thiamine) Mechanism of action
- required for metabolic pathways
- carbohydrate metabolism
- integrity of peripheral nervous system, cardiovascular, GI tract
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Vitamin B1 indications
- metabolic disorders, beriberi, Wernicke's encephalopathy, peripheral neuritis, neuritis of pregnancy
- management of poor appetite, ulcerative colitis, chronic diarrhea, cerebellar syndrome or ataxia
- oral insect repellant
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Vitamin B2 (riboflavin) mechanism of action
- convert two coenzyme essential for tissue respiration
- carbohydrate catabolism
- required to active vitamin B6
- converts tryptophan into niacin
- maintains erythrocyte integrity
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Vitamin B2 indications
- longstanding infections, liver disease, alcoholism, malignancy, probenecid taking
- microcytic anemia, acne, migraine headache, congenital methemoglobinemia, muscle cramps, Goalan's syndrome
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Vitamin B3 Mechanism of action
- carbohydrate, protein, purine, and lipid metabolism, tissue respiration
- glycogenolysis
- antilipemic drug
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Vitamin B3 indications
pellagra and hyperlipidemia
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Vitamin B3 contraindications
liver disease, severe hypotension, arterial hemorrhage, active peptic ulcer disease
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Vitamin B3 adverse effects
flushing, pruritis, and GI distress
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Vitamin B6 mechanism of action
- protein, carbohydrate, and lipid utilization
- conversion of amino acid tryptophan to niacin and serotonin
- necessary for integrity of peripheral nerves, skin, mucous membranes, hematopoietic system
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Vitamin B6 indications
seizures, morning sickness, metabolic disorders
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Vitamin B12 mechanism of action
nucleoprotein and myelin synthesis, cell reproduction, normal growth, hematopoiesis, fat and carbohydrate metabolism, protein synthesis
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Vitamin B12 indications
pernicious and megoblastic anemia
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Vitamin B12 adverse effects
itching, transitory diarrhea, fever
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Vitamin C Mechanism of Action
- collagen synthesis and connective tissue maintenance, tissue repair, folic acid metabolism, erythropoiesis, synthesis of lipids, proteins, and steroids
- maintenance of bone, teeth, and capillaries
- iron absorption, aids in cellular respiration, aids in resistance to infections
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Vitamin C indications
pregnancy, lactation, hyperthyroidism, fever, stress, infection, trauma, burns, smoking, cold exposure, certain drug use
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Vitamin C adverse effects
nausea, vomiting, headache, abdominal cramps, acid urine
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calcium mechanism of action
- teeth and skeletal bone, coagulation pathway catalyst, coafactor in clotting reaction
- maintenance and function of nervous, muscular, and skeletal muscles, renal function, respiration, cell membrane and capillary permeability
- enzyme reaction catalyst
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Calcium contraindications
ventricular fibrillation of the heart
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calcium adverse effects
- anorexia, nausea, vomiting, constipation
- Injection: burning, necrosis, sloughing of tissue, cellulitis, soft tissue calcification
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Magnesium mechanism of action
- cofactor
- required for muscle contraction and nerve function and produces an anticonvulsant effect
- essential for enzyme systems associated with energy metabolism
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Magnesium indications
anticonvulsant, pregnancy complications, inhibit uterine contractions, pediatric acute nephropathy, cardiac dysrythmias, constipation
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Magnesium contraindications
heart block, renal failure, adrenal gland failure, hepatitis
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Magnesium adverse effects
tendon reflex loss, difficult bowel movements, CNS depression, respiratory distress and heart block, hypothermia
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Phosphorus Mechanism of Action
- synthesis of DNA, AMP, ADP, ATP
- necessary for the development and maintenance of the skeletal system and teeth
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Phosphorus adverse effects
- diarrhea, nausea, vomiting, GI disturbances
- confusion, weakness, breathing difficulties
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