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VITATHION®-A.T.P. Servier Ascorbic Acid – Thiamine – Inositol Stress Therapy Indications And Clinical Uses: In the treatment of stress conditions (e.g. fatigue, asthenia, postpartum, postsurgical convalescence); for conditions in which supplements of ascorbic acid, glutathione, adenosine and thiamine are indicated. Precautions: Do not use the contents of a sachet more than 8 days after the sachet has been opened. Dosage: Adults: 1 to 2 sachets daily dissolved in 120 mL…

VITAMIN A ACID Dermik Laboratories Canada Tretinoin Acne Therapy Action And Clinical Pharmacology: The interest in oral vitamin A in the treatment of acne started some 30 years ago following publication of a report by Straumfjord and theoretical support for the use of the vitamin in the reduction of hyperkeratosis came from basic science investigations. Hunter and Pinkus showed a reduction in the number of keratinocytes in the human stratum…

VISKEN® Novartis Pharmaceuticals Pindolol Antihypertensive – Antianginal Action And Clinical Pharmacology: Pindolol is a beta-adrenergic-receptor-blocking agent which possesses partial agonist activity (intrinsic sympathomimetic activity – I.S.A.). Hypertension: The mechanism of the antihypertensive effect of pindolol has not been established. Among the factors that may be involved are: competitive ability to antagonize catecholamine-induced tachycardia at the beta-receptor sites in the heart, thus decreasing cardiac output; a reduction in total peripheral resistance;…

VITAMIN A General Monograph, Vitamin Pharmacology: The term vitamin A is applied to a number of substances with very similar structure and similar activity. The principal and most active substance is all-trans retinol (vitamin A alcohol). Vitamin A activity is assayed biologically and 1 IU equals 1 USP unit which is equal to 0.3 µg of all-trans retinol or 0.6 g of beta-carotene. One retinol equivalent (RE) is the specific…

VITAMIN B1 General Monograph Thiamine Vitamin Pharmacology: Vitamin B1 is a water soluble B complex vitamin. In vivo, vitamin B1 combines with adenosine triphosphate (ATP) to form thiamine pyrophosphate, also known as cocarboxylase, a coenzyme. Its role in carbohydrate metabolism is the decarboxylation of pyruvic acid and alpha-ketoacids to acetaldehyde and carbon dioxide. Increased levels of pyruvic acid in the blood indicate vitamin B1 deficiency. Vitamin B1 depletion can occur…

VITAMIN B2 General Monograph Riboflavin Vitamin Pharmacology: Vitamin B2 is a water-soluble, B complex vitamin. It is required for tissue respiration and is also indirectly involved in maintaining erythrocyte integrity. Vitamin B2 deficiency often accompanies pellagra and other B vitamin deficiency states and is also associated with conditions causing negative protein balance, such as chronic diarrhea, malabsorption syndrome, diabetes mellitus and chronic debilitating diseases. Deficiency is manifested by angular stomatitis,…

VISKAZIDE® Novartis Pharmaceuticals Pindolol – Hydrochlorothiazide Antihypertensive Action And Clinical Pharmacology: Viskazide contains the antihypertensive activity of 2 agents: a beta-adrenergic receptor blocking agent (pindolol) and a diuretic (hydrochlorothiazide). Pindolol is a nonselective beta-adrenergic receptor blocking agent which possesses partial agonist activity (intrinsic sympathomimetic activity-ISA). The mechanism of the antihypertensive effect of beta-adrenergic receptor blocking agents has not been established. Among the factors that may be involved are: (a) competitive…

VIOKASE® Axcan Pharma Pancrelipase Oral Enzyme Therapy Action And Clinical Pharmacology: The natural digestive enzymes in Viokase hydrolyse fats into fatty acids and glycerol, split protein into amino acids, and convert carbohydrates to dextrins and short chain sugars. Under conditions of the USP test method (in vitro), Viokase has the following total digestive capacity The digestive capacity of a pancreatic enzyme concentrate depends on the amount that passes through the…

VIPRINEX® Knoll Ancrod Anticoagulant Action And Clinical Pharmacology: Ancrod, a thrombin-like enzyme obtained from the venom of the Malayan Pit Viper (Agkistrodon rhodostoma), is highly specific for fibrinogen, producing anticoagulation by defibrinogenation. Enzymatically, Ancrod cleaves fibrinogen to split off the A-fibrinopeptides (A, AY and AP), but not the B-fibrinopeptide. The resulting fibrin polymers are imperfectly formed and much smaller in size (1 to 2 m long) than the fibrin polymers…

Virazole (Lyophilized) ICN Ribavirin Antiviral Action And Clinical Pharmacology: Ribavirin is active against respiratory syncytial virus (RSV). In cell cultures, the inhibitory activity of ribavirin for RSV is selective. The mechanism(s) of action is unknown, although evidence exists that inhibition of other RNA and DNA viruses may be due to ribavirin competition with guanosine in formation of viral mRNA cap structures and/or interference with enzymes responsible for functional methylation of…