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Vitamin E
Pronunciation
U.S. Brand Names
Generic Available
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Contraindications
Warnings/Precautions
Adverse Reactions
Drug Interactions
Stability
Mechanism of Action
Pharmacodynamics/Kinetics
Usual Dosage
Reference Range
Mental Health: Effects on Mental Status
Mental Health: Effects on Psychiatric Treatment
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Nursing Implications
Dosage Forms
References

Pronunciation
(VYE ta min ee)

U.S. Brand Names
Amino-Opti-E®[OTC]; Aquasol E®[OTC]; E-Complex-600®[OTC]; E-Vitamin®[OTC]; Vita-Plus® E Softgels®[OTC]; Vitec®[OTC]; Vite E® Creme [OTC]

Generic Available

Yes


Synonyms
d-Alpha Tocopherol; dl-Alpha Tocopherol

Pharmacological Index

Vitamin, Fat Soluble


Use

Prevention and treatment hemolytic anemia secondary to vitamin E deficiency, dietary supplement


Pregnancy Risk Factor

A/C (if dose exceeds RDA recommendation)


Contraindications

Hypersensitivity to vitamin E or any component; I.V. route


Warnings/Precautions

May induce vitamin K deficiency; necrotizing enterocolitis has been associated with oral administration of large dosages (eg, >200 units/day) of a hyperosmolar vitamin E preparation in low birth weight infants


Adverse Reactions

<1%: Headache, fatigue, contact dermatitis with topical preparation, nausea, diarrhea, intestinal cramps, weakness, blurred vision, gonadal dysfunction


Drug Interactions

Vitamin E may impair the hematologic response to iron in children with iron-deficiency anemia; monitor

Vitamin E may alter the effect of vitamin K actions on clotting factors resulting in an increase hypoprothrombinemic response to warfarin; monitor


Stability

Protect from light


Mechanism of Action

Prevents oxidation of vitamin A and C; protects polyunsaturated fatty acids in membranes from attack by free radicals and protects red blood cells against hemolysis


Pharmacodynamics/Kinetics

Absorption: Oral: Depends upon the presence of bile; absorption is reduced in conditions of malabsorption, in low birth weight premature infants, and as dosage increases; water miscible preparations are better absorbed than oil preparations

Distribution: Distributes to all body tissues, especially adipose tissue, where it is stored

Metabolism: In the liver to glucuronides

Elimination: In feces and bile


Usual Dosage

One unit of vitamin E = 1 mg dl-alpha-tocopherol acetate. Oral:

Premature infants less than or equal to 3 months: 17 mg (25 units)

Infants:

less than or equal to 6 months: 3 mg (4.5 units)

7-12 months: 4 mg (6 units)

Children:

1-3 years: 6 mg (9 units); upper limit of intake should not exceed 200 mg/day

4-8 years: 7 mg (10.5 units); upper limit of intake should not exceed 300 mg/day

9-13 years: 11 mg (16.5 units); upper limit of intake should not exceed 600 mg/day

14-18 years: 15 mg (22.5 units); upper limit of intake should not exceed 800 mg/day

Children >13 years and Adults: 15 mg (22.5 units); upper limit of intake should not exceed 1000 mg/day

Pregnant female:

less than or equal to 18 years: 15 mg (22.5 units); upper level of intake should not exceed 800 mg/day

19-50 years: 15 mg (22.5 units); upper level of intake should not exceed 1000 mg/day

Lactating female:

less than or equal to 18 years: 19 mg (28.5 units); upper level of intake should not exceed 800 mg/day

19-50 years: 19 mg (28.5 units); upper level of intake should not exceed 1000 mg/day

Vitamin E deficiency:

Children (with malabsorption syndrome): 1 unit/kg/day of water miscible vitamin E (to raise plasma tocopherol concentrations to the normal range within 2 months and to maintain normal plasma concentrations)

Adults: 60-75 units/day

Prevention of vitamin E deficiency: Adults: 30 units/day

Prevention of retinopathy of prematurity or BPD secondary to O2 therapy: (American Academy of Pediatrics considers this use investigational and routine use is not recommended):

Retinopathy prophylaxis: 15-30 units/kg/day to maintain plasma levels between 1.5-2 mg/mL (may need as high as 100 units/kg/day)

Cystic fibrosis, beta-thalassemia, sickle cell anemia may require higher daily maintenance doses:

Cystic fibrosis: 100-400 units/day

Beta-thalassemia: 750 units/day

Sickle cell: 450 units/day

Alzheimer's disease: 1000 units twice daily

Tardive dyskinesia: 1600 units/day

Topical: Apply a thin layer over affected area


Reference Range

Therapeutic: 0.8-1.5 mg/dL (SI: 19-35 mmol/L), some method variation


Mental Health: Effects on Mental Status

May rarely cause drowsiness


Mental Health: Effects on Psychiatric Treatment

Used to prevent or treat tardive dyskinesia and Alzheimer's disease


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

No effects or complications reported


Patient Information

Take exactly as directed; do not take more than the recommended dose. Do not use mineral oil or other vitamin E supplements without consulting prescriber. Report persistent nausea, vomiting, or cramping; or gonadal dysfunction.


Nursing Implications

Monitor plasma tocopherol concentrations (normal range: 6-14 mcg/mL)


Dosage Forms

Capsule: 100 units, 200 units, 330 mg, 400 units, 500 units, 600 units, 1000 units

Capsule, water miscible: 73.5 mg, 147 mg, 165 mg, 330 mg, 400 units

Cream: 50 mg/g (15 g, 30 g, 60 g, 75 g, 120 g, 454 g)

Drops, oral: 50 mg/mL (12 mL, 30 mL)

Liquid, topical: 10 mL, 15 mL, 30 mL, 60 mL

Lotion: 120 mL

Oil: 15 mL, 30 mL, 60 mL

Ointment, topical: 30 mg/g (45 g, 60 g)

Tablet: 200 units, 400 units


References

American Academy of Pediatrics Committee on Fetus and Newborn, "Vitamin E and the Prevention of Retinopathy of Prematurity," Pediatrics, 1985, 76(2):315-6.

Bieri JG, Corash L, and Hubbard VS, "Medical Uses of Vitamin E," N Engl J Med, 1983, 308(18):1063-71.

Hale TW, Rais-Bahrami K, Montgomery DL, et al, "Vitamin E Toxicity in Neonatal Piglets," J Toxicol Clin Toxicol, 1995, 33(2):123-30.

Hodis HN, Mack WJ, La Bree L, et al, "Serial Coronary Angiographic Evidence That Antioxidant Vitamin Intake Reduces Progression of Coronary Artery Atherosclerosis," JAMA, 1995, 273(23):1849-54.

Johnson L, Bowen FW Jr, Abbasi S, et al, "Relationship of Prolonged Pharmacologic Serum Levels of Vitamin E to Incidence of Sepsis and Necrotizing Enterocolitis in Infants With Birth Weight 1500 Grams or Less," Pediatrics, 1985, 75(4):619-38.

Karp WB and Robertson AF, "Vitamin E in Neonatology," Adv Pediatr, 1986, 33:127-47.

Saperstein H, Rapaport M, and Rietschel RL, "Topical Vitamin E as a Cause of Erythema Multiforme-Like Eruption," Arch Dermatol, 1984, 120(7):906-8.


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