Development and evaluation of oral osmotic pump of butorphanol tartrate. 2014

Bhavik Shah, and Yogesh Raichandani, and Ambikanandan Misra
Drug Delivery Laboratory, Department of Pharmacy, Faculty of Technology and Engineering, TIFAC Centre of Relevance and Excellence in NDDS, The Maharaja Sayajirao University of Baroda , Vadodara , India.

Butorphanol is potent analgesic useful in pain management. However, because of high first-pass metabolism butorphanol is not available in market as oral dosage form. Drugs that undergo extensive first-pass metabolism can be delivered orally if protected in the stomach, and proximal small intestine. An oral controlled porosity osmotic pump (CPOP) was designed to deliver butorphanol tartrate that can maintain therapeutic blood concentration up to 24 h. The target release profile for extended release formulation was calculated by Wagner Nelson de-convolution using published immediate release blood concentration data for oral route. Composition of the core and coating were optimized using USFDA approved ingredients by evaluation of the drug release. Drug release from the developed system was inversely proportional to the weight gain and directly related to the level of pore former. Scanning electron microscopy (SEM) confirmed the formation of pores in the coating membrane on contact with water which lead to drug to release. Kinetic models were applied to drug release data to establish the drug release mechanism. The developed osmotic system effectively delivers selected drug at a predetermined rate for extended period.

UI MeSH Term Description Entries
D009997 Osmotic Pressure The pressure required to prevent the passage of solvent through a semipermeable membrane that separates a pure solvent from a solution of the solvent and solute or that separates different concentrations of a solution. It is proportional to the osmolality of the solution. Osmotic Shock,Hypertonic Shock,Hypertonic Stress,Hypotonic Shock,Hypotonic Stress,Osmotic Stress,Hypertonic Shocks,Hypertonic Stresses,Hypotonic Shocks,Hypotonic Stresses,Osmotic Pressures,Osmotic Shocks,Osmotic Stresses,Pressure, Osmotic,Pressures, Osmotic,Shock, Hypertonic,Shock, Hypotonic,Shock, Osmotic,Shocks, Hypertonic,Shocks, Hypotonic,Shocks, Osmotic,Stress, Hypertonic,Stress, Hypotonic,Stress, Osmotic,Stresses, Hypertonic,Stresses, Hypotonic,Stresses, Osmotic
D002077 Butorphanol A synthetic morphinan analgesic with narcotic antagonist action. It is used in the management of severe pain. 17-(Cyclobutylmethyl)morphinan-3,14-diol,Apo-Butorphanol,BC-2627,Beforal,Butorphanol Tartrate,Dolorex,Moradol,Stadol,Stadol NS,Torbugesic,BC 2627,BC2627
D003692 Delayed-Action Preparations Dosage forms of a drug that act over a period of time by controlled-release processes or technology. Controlled Release Formulation,Controlled-Release Formulation,Controlled-Release Preparation,Delayed-Action Preparation,Depot Preparation,Depot Preparations,Extended Release Formulation,Extended Release Preparation,Prolonged-Action Preparation,Prolonged-Action Preparations,Sustained Release Formulation,Sustained-Release Preparation,Sustained-Release Preparations,Timed-Release Preparation,Timed-Release Preparations,Controlled-Release Formulations,Controlled-Release Preparations,Extended Release Formulations,Extended Release Preparations,Slow Release Formulation,Sustained Release Formulations,Controlled Release Formulations,Controlled Release Preparation,Controlled Release Preparations,Delayed Action Preparation,Delayed Action Preparations,Formulation, Controlled Release,Formulations, Controlled Release,Prolonged Action Preparation,Release Formulation, Controlled,Release Formulations, Controlled,Sustained Release Preparation,Timed Release Preparation,Timed Release Preparations
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000284 Administration, Oral The giving of drugs, chemicals, or other substances by mouth. Drug Administration, Oral,Administration, Oral Drug,Oral Administration,Oral Drug Administration,Administrations, Oral,Administrations, Oral Drug,Drug Administrations, Oral,Oral Administrations,Oral Drug Administrations
D000701 Analgesics, Opioid Compounds with activity like OPIATE ALKALOIDS, acting at OPIOID RECEPTORS. Properties include induction of ANALGESIA or NARCOSIS. Opioid,Opioid Analgesic,Opioid Analgesics,Opioids,Full Opioid Agonists,Opioid Full Agonists,Opioid Mixed Agonist-Antagonists,Opioid Partial Agonists,Partial Opioid Agonists,Agonist-Antagonists, Opioid Mixed,Agonists, Full Opioid,Agonists, Opioid Full,Agonists, Opioid Partial,Agonists, Partial Opioid,Analgesic, Opioid,Full Agonists, Opioid,Mixed Agonist-Antagonists, Opioid,Opioid Agonists, Full,Opioid Agonists, Partial,Opioid Mixed Agonist Antagonists,Partial Agonists, Opioid
D012995 Solubility The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Solubilities
D016062 Porosity Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance. Porosities

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