Beta Carotene + Vitamin C + Vitamin E + Vit B12 Pharmacology

Beta Carotene + Vitamin C + Vitamin E + Vit B12

About Beta Carotene + Vitamin C + Vitamin E + Vit B12
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Mechanism of Action of Beta Carotene + Vitamin C + Vitamin E + Vit B12
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Pharmacokinets of Beta Carotene + Vitamin C + Vitamin E + Vit B12
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Onset of Action for Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Duration of Action for Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Half Life of Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Side Effects of Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Contra-indications of Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Special Precautions while taking Beta Carotene + Vitamin C + Vitamin E + Vit B12
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Pregnancy Related Information
Use with caution
Old Age Related Information
N/A
Breast Feeding Related Information
Use with caution
Children Related Information
N/A
Indications for Beta Carotene + Vitamin C + Vitamin E + Vit B12
1.Antioxidant
Interactions for Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Typical Dosage for Beta Carotene + Vitamin C + Vitamin E + Vit B12
One capsule / day
Schedule of Beta Carotene + Vitamin C + Vitamin E + Vit B12
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Storage Requirements for Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Effects of Missed Dosage of Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A
Effects of Overdose of Beta Carotene + Vitamin C + Vitamin E + Vit B12
N/A

Beta Carotene

About Beta Carotene
A natural precursor to Vitamin A.
Mechanism of Action of Beta Carotene
Beta-carotene acts as the precursor of Vitamin A and in the body it is converted in to Vitamin A. Vitamin A is required for a variety of physiological functions in the body such as: - 1).Proper functioning of retina and formation of pigment Rhodopsin during dark adaptation. 2).promotes differentiation and maintains structural integrity of epithelia over the body and also retard the malignancies of epithelial structures.3).Promotes mucous secretion. 4).Inhibits keratinization, 5). Maintains proper bone growth, 6).Maintenance of spermatogenesis, 7).Supports foetal development, 8).Improves resistance to infection. It is required for proper antibody response, normal lymphocyte proliferation and killer cell function.
Pharmacokinets of Beta Carotene
Absorption: Completely absorbed normally. Steatorrhoea, bile deficiency, and protein poor diet adversely affects the absorption and absorption requires bile salts, pancreatic lipase, and dietary fat.
Distribution: Stored primarily as palmitate in kupffer`s cells in liver. Circulates in the form of specific alpha-1 protein; retinol binding protein and transported to cellular retinol binding protein of target cells.
Metabolism: Metabolized in the liver.
Excretion: Excreted mainly through bile and a small amount is excreted through urine.
Onset of Action for Beta Carotene
N/A
Duration of Action for Beta Carotene
N/A
Half Life of Beta Carotene
N/A
Side Effects of Beta Carotene
Adverse effects occurs only with higher doses and toxicity
1. Nausea
2. Vomiting
3. Itching
4. Dermatitis
5. Exfoliation
6. Alopecia
7. Bone and joint pain
8. Anorexia
9. Irritability
10. Increased intracranial pressure
11. Hepatic impairment
12. Anaphylactic shock
Contra-indications of Beta Carotene
1. Hypervitaminosis A
2. Hypersensitivity to Beta Carotene
Special Precautions while taking Beta Carotene
1. Oral form should not use in patients with malabsorption syndrome.
2. In inadequate bile secretion oral route may be used with concurrent administration of bile salts.
3. I. V. route is contraindicated except for special water miscible forms intended for infusion with large parenteral volumes and should not use I. V. push of vitamin A of any type.
Pregnancy Related Information
Use with caution
Old Age Related Information
Use with caution
Breast Feeding Related Information
Use with caution
Children Related Information
Use with caution
Indications for Beta Carotene
1. Vitamin A deficiency
2. Xerophthalmia
3. Acne
4. Ichthyosis
5. Bitot`s spots
6. Night blindness
Interactions for Beta Carotene
Cholestyramine: Absorption of Vitamin A is reduced due to reduced availability of fat stabilizing bile salts.
Mineral oil: Interferes with intestinal absorption of Vitamin A.
Oral Contraceptives: Plasma Vitamin A levels are significantly increased.
Typical Dosage for Beta Carotene
Severe vitamin A deficiency with xerophthalmia: 500000 IU daily for 3 days followed by 50000 IU daily for 14 days. Then maintenance dosage of 10000 to 20000 IU for 2months followed by adequate dietary nutrition and RDA vitamin A supplements.
Severe vitamin A deficiency: 100000 IU daily for 3 days followed by 50000 IU daily for 14 days. Then maintenance dosage of 10000 to 20000 IU for 2months followed by adequate dietary nutrition and RDA vitamin A supplements.
Children: 5000 to 10000 IU daily for 14 days.
Schedule of Beta Carotene
C1 (Oral)
C (Parenteral)
Storage Requirements for Beta Carotene
Store in a well closed, airtight container in a cool dry place.
Effects of Missed Dosage of Beta Carotene
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Beta Carotene
Discontinue the vitamin A if hypercalcaemia persists and administer I.V. saline, prednisolone, and calcitonin if required. Monitor hepatic function tests to detect liver damage.

Vitamin C

About Vitamin C
Water soluble vitamin, antioxidant.
Mechanism of Action of Vitamin C
Vitamin C exerts it`s action by influencing the biologic oxidations and reductions used in cellular respirations. It directly stimulates collagen synthesis and maintains intracellular connective tissue. It involves in various metabolic reactions such as 1).Hydroxylation of praline and lysine residues of protocollagen which is essential for formation and stabilization of collagen triple helix, 2).hydroxylation of carnitine, 3).Conversion of folic acid to folinic acid, 4).biosynthesis of adrenal steroids, catecholamines, oxytocin, and ADH, 5).Metabolism of cyclic nucleotides and prostaglandins. Vitamin C is important in resistance to infections.
Pharmacokinets of Vitamin C
Absorption: Well absorbed orally.
Distribution: Widely distributed both extracellularly and intracellularly, It crosses the placenta and also distributed in to the breast milk.
Metabolism: Metabolized in the liver; partly oxidized in to active dehydroascorbic acid and inactive metabolites.
Excretion: Inactive metabolites and extra drug is excreted through urine.
Onset of Action for Vitamin C
N/A
Duration of Action for Vitamin C
N/A
Half Life of Vitamin C
N/A
Side Effects of Vitamin C
1. Discomfort at injection site
2. Acid urine
3. Renal calculi
4. Oxaluria
Contra-indications of Vitamin C
No known contraindications
Special Precautions while taking Vitamin C
1. Renal impairment
2. Ingestion of large doses during pregnancy has resulted in scurvy in neonates
Pregnancy Related Information
Use with caution
Old Age Related Information
Use with caution
Breast Feeding Related Information
Use with caution
Children Related Information
May be used
Indications for Vitamin C
1. Scurvy
2. Prophylaxis and treatment of vitamin C deficiency
3. As an antioxidant to maintain natural colour and flavour of food items
4. For acidification of urine
5. Capillary fragility
6. Dental caries

Interactions for Vitamin C
Oral contraceptives and estrogens: Vitamin C increases serum levels of oestrogen resulting in adverse reactions .
Warfarin: The anticoagulant effects of warfarin is reduced.
Lab Tests: Large doses (>500 mg) of vitamin C may cause false negative urine glucose determinations. May result in false negative amine dependent stool occult blood tests.
Typical Dosage for Vitamin C
Oral:
Adults: 50 to 1000mg/day depending up on the requirement.
Pregnancy and lactation: 100 to 150mg/day
Children: 30 to 100mg/day.
Scurvy:
Oral:
Adults: 1000mg twice daily to thrice daily.
Children: 300mg to 1000mg daily.
Sub clinical scurvy:
Oral, S.C., I.M., or I.V.: 100 to 250mg once daily or twice daily depending up on the severity of the condition. Then give a maintenance dosage of 50mg/day.
Children: 100 to 300mg depending up on the severity. Then give a maintenance dose of 35mg/day.

Schedule of Vitamin C
C1 (Oral)
C (Parenteral)
Storage Requirements for Vitamin C
Store in a cool dry area in a well closed container. Protects from moisture, light and direct heat.
Effects of Missed Dosage of Vitamin C
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Vitamin C
Discontinue the therapy and provide symptomatic and supportive measures.

Vitamin E

About Vitamin E
N/A
Mechanism of Action of Vitamin E
Vitamin E acts as an antioxidant and protecting unsaturated lipids in the cell membrane, coenzyme Q, vitamin A, vitamin C etc. from free radical oxidation damage and generation of toxic peroxidation products. It also decreases platelet aggregation.
Pharmacokinets of Vitamin E
Absorption: Absorbed through lymph with the help of bile. Only 20 to 60% of vitamin from dietary sources is absorbed. As dose increases the fraction absorbed decreases.
Distribution: Widely distributed in a protein bound form and stored in adipose tissue.
Metabolism: Metabolized in liver by glucuronide conjugation.
Excretion: Excreted mainly through bile and also excreted through urine.
Onset of Action for Vitamin E
N/A
Duration of Action for Vitamin E
N/A
Half Life of Vitamin E
N/A
Side Effects of Vitamin E
1. Fatigue
2. Weakness
3. Headache
4. Nausea
5. Diarrhoea
6. Blurred vision
7. Flatulence


Contra-indications of Vitamin E
1. Hypersensitivity to the drug
2. Should not administer intravenously
Special Precautions while taking Vitamin E
1. Hepatic impairment
2. Gall bladder disease
3. Along with estrogens
Pregnancy Related Information
May be used
Old Age Related Information
N/A
Breast Feeding Related Information
May be used
Children Related Information
N/A
Indications for Vitamin E
1. Vitamin E deficiency
2. Intermittent claudication
3. Nocturnal muscle cramps
4. Coronary artery disease
5. Fibrocystic breast disease
6. Cystic fibrosis
7. In premature infants exposed to high concentration of oxygen
8. As antioxidant


Interactions for Vitamin E
Oral anticoagulants : Hypoprothrombinemic effect may be increased with possibility of bleeding.

Typical Dosage for Vitamin E
Oral:
Vitamin E deficiency:
Adults: 40 to 50mg/day or 60 to 75i.u. daily based on the severity of deficiency.
Children: 1 unit/kg/day.
Premature neonates: 5units daily.
Full term neonates: 5 units per liter of formula.
Intermittent claudication: 400mg/day for 12 to 18 weeks.
Nocturnal muscle cramps: 400mg/day for 8 to 12 weeks.
Coronary artery disease: 100 to 200mg/day for at least 2 years.
Fibrocystic breast disease: 600mg/day for at least 2years.
Cystic fibrosis: 100 to 200mg/day.
Children above 1 year: 100mg/day.
Children below 1year: 50mg/day.



Schedule of Vitamin E
C1
Storage Requirements for Vitamin E
Store in a well closed container in a cool dry place. Protect from light.
Effects of Missed Dosage of Vitamin E
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Vitamin E
Provide supportive measures and symptomatic treatment.

Vit B12

About Vit B12
N/A
Mechanism of Action of Vit B12
Vitamin B12 is an essential constituent for growth, cell reproduction, hematopoiesis, and nucleoprotein and myelin synthesis. Vitamin B12 is converted in to coenzyme B12 in the tissues which is essential for conversion of methyl-malonate to succinate and synthesis of methionine from homocystine. It is also associated with fat and carbohydrate metabolism and protein synthesis. Cells characterized by rapid division such as epithelial cells, bone marrow, and myeloid cells appear to have greatest requirement of Cyanocobalamin.
Pharmacokinets of Vit B12
Absorption: Absorbed irregularly after oral administration and absorption depends on Ca and intrinsic factor. It is also administered subcutaneously and intramuscularly.
Distribution: Distributed in to liver, bone marrow, and other tissues. It crosses the placenta and appears in breast milk.
Metabolism: It is metabolized in liver.
Excretion: In normal dosage it is reabsorbed from bile and a minute portion is excreted through urine but the extra drug is excreted through urine.
Onset of Action for Vit B12
N/A
Duration of Action for Vit B12
N/A
Half Life of Vit B12
N/A
Side Effects of Vit B12
1. Anaphylaxis
2. Anaphylactoid reactions
3. Pain and burning sensation at injection site
4. Itching
5. Urticaria
6. Transient diarrhea
7. Peripheral vascular thrombosis
8. Pulmonary oedema
Contra-indications of Vit B12
1. Hypersensitivity to the drug
2. Leber`s disease
Special Precautions while taking Vit B12
1. Anemic patients with coexisting cardiac, pulmonary and hypertensive diseases.
Pregnancy Related Information
May be used
Old Age Related Information
May be used
Breast Feeding Related Information
May be used
Children Related Information
Use with caution
NEONATES : Use with caution
Indications for Vit B12
1. Vitamin B12 deficiency
2. Pernicious Anaemia
3. Peripheral neuropathy (diabetic, alcoholic, and drug induced)
Interactions for Vit B12
N/A
Typical Dosage for Vit B12
I.M., S.C.:
Pernicious Anaemia: 100mcg daily for 1 week followed by the same dose given on alternate days for 7 doses and then every 3 to 4days for another 3 weeks. This regimen should be followed by 100mcg monthly for life. Concurrently administer folic acid if required.
Vitamin B12 deficiency other than pernicious Anaemia: 30mcg daily for 5 to 10days depending up on the severity of the condition.
Maintenance dosage: 100 to 200mcg once monthly.
Children: 100mcg I.M. or S.C. over the course of 2 or more weeks.
Maintenance dosage: 60mcg monthly I.M. or S.C.
Schilling test flushing dose:
Adults and Children: 1000mcg I.M. in single dose
Recommended RDA (recommended dietary allowance) for Vitamin B12:
Infants up to 6months of age: 0.3mcg.
Children age 6 months to 1 year: 0.5mcg.
Children age 1 to 3: 0.7mcg.
Children age 4 to 6: 1mcg.
Children age 7 to 10: 1.4mcg.
Children age 11 to adult: 2mcg..
Pregnant women: 2.2mcg.
Breast feeding women: 2.6mcg.
Schedule of Vit B12
C
Storage Requirements for Vit B12
Store at room temperature range of 15 to 30 degree C.in a light resistant well closed container in a dry place.
Effects of Missed Dosage of Vit B12
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Vit B12
Not applicable. Even in large doses Vitamin B12 isn`t usually toxic.

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