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VIAGRA® (sildenafil citrate) Tablets DESCRIPTION VIAGRA®, an oral therapy for erectile dysfunction, is the citrate salt of sildenafil, a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). Sildenafil citrate is designated chemically as 1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate and has the following structural formula: Sildenafil citrate is a white to off-white crystalline powder with a solubility of 3.5 mg/mL in water and a molecular weight of 666.7. VIAGRA® (sildenafil citrate)…

VIASPAN™ DuPont Pharma Cold Storage Solution Indications And Clinical Uses: For the flushing and cold storage of organs including kidney, liver and pancreas at the time of their removal from the donor in preparation for storage, transportation and eventual transplantation into a recipient. After precooling the solution to approximately 2 to 6°C in ice, the cold solution is used to flush the isolated organ immediately before removal from the donor…

VERSED® Roche Midazolam Premedicant – Sedative – Anesthetic Action And Clinical Pharmacology: General: Adult and Pediatric: I.V. midazolam has been associated with respiratory depression and respiratory arrest, especially when used for sedation in noncritical care settings. In some cases, where this was not recognized promptly and treated effectively, death or hypoxic encephalopathy has resulted. I.V. midazolam should be used only in hospital or ambulatory care settings that provide for continuous…

VESANOID™ Roche All-trans Retinoic Acid Tretinoin Differentiation Inducing Agent Caution: All-trans retinoic acid should be administered to patients with APL only under the strict supervision of a physician who is experienced in the treatment of hematological/oncological diseases. Action And Clinical Pharmacology: All-trans retinoic acid is a natural metabolite of retinol and belongs to the class of compounds known as retinoids, which are structurally related to vitamin A and comprise natural…

VELBE® Lilly Vinblastine Sulfate Antineoplastic Agent Action And Clinical Pharmacology: Vinblastine has been used for the palliative treatment of a variety of malignant neoplastic conditions. In susceptible clinical cases, vinblastine sulfate has produced temporary reduction in the size or temporary disappearance of some tumors. It has relieved pain and other symptoms and allowed some patients to regain appetite and weight. Periods of remission have varied from patient to patient. Experimental…

VENTOLIN® VENTODISK® VENTODISK® DISKHALER® VENTOLIN® ROTACAPS® VENTOLIN® ROTAHALER® VENTOLIN® RESPIRATOR SOLUTION VENTOLIN® NEBULES P.F. Glaxo Wellcome Salbutamol Bronchodilator – Beta2-adrenergic Stimulant Action And Clinical Pharmacology: Salbutamol produces bronchodilation through stimulation of beta2-adrenergic receptors in bronchial smooth muscle, thereby causing relaxation of bronchial muscle fibres. This action is manifested by an improvement in pulmonary function as demonstrated by spirometric measurements. At therapeutic doses, salbutamol has little action on the beta1-adrenergic receptors…

VEPESID® Bristol Etoposide Antineoplastic Action And Clinical Pharmacology: Etoposide is a semi-synthetic derivative of podophyllotoxin. In vitro, etoposide has cytostatic action, which prevents the cells from entering mitosis or destroys them in the premitotic phase. Etoposide interferes with the synthesis of DNA and has a secondary effect on arresting cells in resting (G2) phase in experiments with human lymphoblastic cell lines. Etoposide has a marked action on human hemopoietic cells…

VERELAN® Wyeth-Ayerst Verapamil HCl Antihypertensive Action And Clinical Pharmacology: Verapamil is a calcium ion influx inhibitor (calcium entry blocker or calcium ion antagonist) which exerts its pharmacologic effects by modulating the influx of ionic calcium across the cell membrane of the arterial smooth muscle as well as in conductile and contractile myocardial cells. Verapamil exerts antihypertensive effects by inducing peripheral vasodilation and reducing peripheral vascular resistance usually without reflex tachycardia….

VASOPRESSIN INJECTION Pharmaceutical Partners Antidiuretic Agent Action And Clinical Pharmacology: The antidiuretic action of vasopressin is ascribed to increasing reabsorption of water by the renal tubules. Vasopressin can cause contraction of smooth muscle of the gastrointestinal tract and of all parts of the vascular bed especially the capillaries, small arterioles and venules with less effect on the smooth musculature of the large veins. The direct effect on the contractile elements…

VASOTEC® VASOTEC® I.V. Frosst Enalapril Maleate Enalaprilat Angiotensin Converting Enzyme Inhibitor Action And Clinical Pharmacology: Enalapril is an ACE inhibitor which is used in the treatment of hypertension and heart failure. Enalaprilat is an active metabolite of enalapril and is used in the treatment of hypertension. Angiotensin converting enzyme (ACE) is a peptidyl dipeptidase which catalyzes the conversion of angiotensin I to the pressor substance, angiotensin II. After absorption, enalapril,…