Vit B3 Pharmacology

Vit B3

About Vit B3
N/A
Mechanism of Action of Vit B3
Niacin refers to Nicotinic acid as well as Nicotinamide which exerts it`s action by influencing metabolic reactions. It is converted in to coenzymes Ncotinamide adenine dinucleotide (NAD) and it`s phosphate Ncotinamide adenine dinucleotide phosphate (NADP) involved in oxidation reduction reactions. These pyridine nucleotides act as hydrogen acceptors in the electron transport chain in tissue respiration, glycolysis, and fat synthesis. Nicotinic acid in high doses has vasodilator effects and also improves lipid profile; reduces serum cholesterol, raises HDL level, lowers VLDL, and LDL levels.
Pharmacokinets of Vit B3
Absorption: Well absorbed orally, Distribution: Widely distributed in the body, and also secreted in to breast milk, Modest amounts are stored in liver, Metabolism: Metabolized in to active metabolites in liver, Excretion: Extra drug is excreted through urine.
Onset of Action for Vit B3
N/A
Duration of Action for Vit B3
N/A
Half Life of Vit B3
N/A
Side Effects of Vit B3
1. Flushing
2. Activation of peptic ulcer
3. Nausea
4. Vomiting
5. Diarrhoea
6. Headache
7. Rashes
8. Pruritus
9. Hypotension
10. Arrhythmias
11. Hepatic impairment
Contra-indications of Vit B3
1. Hypersensitivity to the drug
2. Hepatic impairment
3. Peptic ulcer
4. Severe hypotension
5. Arterial haemorrhage
Special Precautions while taking Vit B3
1.History of liver disease
2.Gall bladder diseases
3.Gout
4.Coronary artery diseases
5.Diabetes mellitus
6.When use along with Statins reduces the dosage of Statins
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 Vit B3
1. Pellagra
2. Niacin deficiency
3. Hartnup disease
4. Hyperlipidaemia (only nicotinic acid
5. Peripheral vascular diseases (only nicotinic acid)
Interactions for Vit B3
Aspirin: May decrease the metabolic clearance of nicotinic acid
Sympathetic blocking agent: May cause added vasodilation and hypotension
Isoniazid: may deplete levels of niacin and cause deficiency.
Typical Dosage for Vit B3
Oral:
Pellagra: 200 to 500mg daily in divided doses
Prophylactically: 20 to 50mg daily.
Dietary supplement: 10 to 20mg daily
Peripheral vascular diseases (only nicotinic acid): 100 to 150mg three to five times daily. Alternatively 1000 to 2000g once daily at bed time.
Hyperlipidaemia (only nicotinic acid): 1.5 to 6g daily in two to four divided doses with or after meals.
Hartnup disease: 50 to 200mg daily in divided doses.
Schedule of Vit B3
C1
Storage Requirements for Vit B3
Store at controlled room temperature at a range of 15 to 30 degree C
Effects of Missed Dosage of Vit B3
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 B3
Provide supportive measures and symptomatic treatment

Home Delivery for Vit B3 in Your City

Medicine India is just a publishing medium for medicine related information and does not provide services or sales of medicines including vit b3.

However, we do publish a comprehensive directory of Pharmacies, Chemists and Druggists in cities all over India. You can use this directory to find the medicine stores in your city (or area) that provide home delivery services for vit b3 and other medicines and health products. Home delivery services for vit b3 may be free or they may cost you depending on the pharmacy and the minimum order requirements. It would be best to get this clarified while placing the order.

Please be aware that you should take vit b3 only if a doctor has recommended or prescribed it. Some or all pharmacies who provide a home delivery service for medicines might insist on a prescription for vit b3 before they complete the sale. You can get this information while placing the order for vit b3 with the pharmacy.

Vit B3 is a generic medicine name and there are several brands available for it. Some of the brands for vit b3 might be better known than vit b3 itself. If the pharmacy that's willing to deliver medicines to your home doesn't have vit b3 in stock, you can ask for one of the branded alternatives for vit b3.