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REBIF™ Serono Interferon beta-1a Immunomodulator Action And Clinical Pharmacology: General: Interferons are a family of naturally occurring proteins, which have molecular weights ranging from 15 000 to 21 000 daltons. Three major classes of interferons have been identified: alpha, beta and gamma. Interferon beta, interferon alpha and interferon gamma have overlapping yet distinct biologic activities. Interferon beta-1a acts through various mechanisms: Immunomodulation through the induction of cell membrane components of…

Rabies Vaccine Inactivated (Diploid Cell Origin), Dried Connaught Vaccine Action And Clinical Pharmacology: The administration of Rabies Vaccine Inactivated (Diploid Cell Origin), Dried stimulates the rapid development of specific antibodies. Pre-exposure Immunization: Pre-exposure clinical trials have been carried out since 1979 with the present vaccine or its less purified predecessors in over 600 volunteers. Following 3 injections of 1 mL each of vaccine, all developed antibodies at a level of…

RAXAR™ Glaxo Wellcome Grepafloxacin HCl Antibacterial Action And Clinical Pharmacology: Grepafloxacin is a broad-spectrum fluoroquinolone antibiotic. It has in vitro activity against a wide range of gram-positive and gram-negative aerobic microorganisms, as well as some atypical microorganisms. Grepafloxacin exerts its antibacterial activity by inhibiting bacterial topoisomerase II (DNA gyrase) and topoisomerase IV, essential enzymes for duplication, transcription, and repair of bacterial DNA. Grepafloxacin is bactericidal at concentrations equal to or…

PRINIVIL® MSD Lisinopril Angiotensin Converting Enzyme Inhibitor Action And Clinical Pharmacology: Lisinopril is an ACE inhibitor which is used in the treatment of hypertension, congestive heart failure and following myocardial infarction in hemodynamically stable patients. Angiotensin converting enzyme (ACE) is a peptidyl dipeptidase which catalyzes the conversion of angiotensin I to the pressor substance, angiotensin II. Inhibition of ACE results in decreased plasma angiotensin II, which leads to increased plasma…

PRINZIDE® MSD Lisinopril – Hydrochlorothiazide Angiotensin Converting Enzyme Inhibitor – Diuretic Action And Clinical Pharmacology: Prinzide combines the action of an angiotensin converting enzyme inhibitor, lisinopril, and a diuretic, hydrochlorothiazide. Lisinopril: Angiotensin converting enzyme (ACE) is a peptidyl dipeptidase which catalyzes the conversion of angiotensin I to the pressor substance, angiotensin II. Inhibition of ACE results in decreased plasma angiotensin II, which leads to increased plasma renin activity (due to…

PRO-LAX® Rivex Pharma Polyethylene Glycol 3350 – Electrolytes Laxative Action And Clinical Pharmacology: Pro-Lax contains PEG 3350, which is an inert, non-toxic, water-soluble polymer that acts as an osmotic agent. When administered as a solution, the PEG 3350 component of Pro-Lax prevents absorption by the intestinal tract of the portion of water ingested, thereby serving to hydrate and soften stools, and promote peristalsis. Pro-Lax does not affect electrolyte absorption in…

PRO-BANTHINE® Roberts Propantheline Bromide Anticholinergic Action And Clinical Pharmacology: Propantheline bromide is a synthetic quaternary ammonium anticholinergic agent which inhibits gastrointestinal motility and spasm and diminishes gastric acid secretion. The drug also inhibits the action of acetylcholine at the postganglionic nerve endings of the parasympathetic nervous system. Its effects are similar to those of atropine although they last longer (6 hours). The antispasmodic effects on the gastrointestinal tract may occur…

PRIMACOR® Sanofi Milrinone Lactate Inotrope – Vasodilator Action And Clinical Pharmacology: Milrinone is a positive inotrope and vasodilator, with little chronotropic activity, different in structure and mode of action from either the digitalis glycosides or catecholamines. Milrinone, at relevant inotropic and vasorelaxant concentrations, is a selective inhibitor of peak III cAMP phosphodiesterase isozyme in cardiac and vascular muscle. This inhibitory action is consistent with cAMP mediated increases in intracellular ionized…

PRIMAXIN® MSD Imipenem – Cilastatin Sodium Antibiotic Action And Clinical Pharmacology: Imipenem exerts a bactericidal action by inhibiting cell wall synthesis in aerobic and anaerobic gram-positive and gram-negative bacteria. Primaxin consists of 2 components: imipenem, a derivative of thienamycin, a carbapenem antibiotic; and cilastatin sodium, a specific inhibitor of dehydropeptidase-I a renal enzyme which metabolizes and inactivates imipenem. Cilastatin blocks the metabolism of imipenem in the kidney, so that concomitant…

PRIMENE® Clintec Amino Acids I.V. Nutritive Supplement Action And Clinical Pharmacology: Primene is a sterile, nonpyrogenic, hypertonic solution of essential and nonessential amino acids in a Pharmacy Bulk Package. A Pharmacy Bulk Package is a container of a sterile preparation for parenteral use in a pharmacy admixture program and is restricted to the preparation of admixtures for i.v. infusion. Primene provides a mixture of essential and nonessential amino acids as…