45 results about "Methylnaltrexone" patented technology

This invention relates to S-MNTX, methods of producing S-MNTX, pharmaceutical preparations comprising S-MNTX and methods for their use.

A composition comprising the tannate of an opioid. Suitable opioids include alfentanil, buprenorphine, butorphanol, carfentanil, cocaine, codeine, dezocine, diacetylmorphine, dihydrocodeine, dihydromorphine, diphenoxylate, diprenorphine, etorphine, fentanyl, heroin, hydrocodone, hydromorphone, beta-hydroxy-3-methylfentanyl, levo-alpha-acetylmethadol, levorphanol, lofentanil, meperidine, methadone, morphine, nalbuphine, nalmefene, o-methylnaltrexone, naloxone, naltrexone, oxycodone, oxymorphone, pentazocine, pethidine, propoxyphene, remifentanil, sufentanil, tilidine and tramadol. The opioid tannate may be readily prepared by reacting an opioid free base with tannic acid, either neat or in the presence of up to about 30 wt. % water, at a temperature of about 60 to about 150° C. and thereafter recovering the resultant opioid tannate. The opioid tannate may also be prepared by an alternative process that involves reacting the opioid free base with water at a temperature such that not more than about 10 wt. % of the opioid tannate will be decomposed and thereafter removing the water by freeze-drying.

A composition for preventing or treating the opioid induced side effect, inhibition of gastrointestinal motility is disclosed. The composition comprises methylnaltrexone or another quaternary derivative of noroxymorphone administered to a patient prior to the administration of an opioid or after the onset of side effects induced by the administration of an opioid, wherein the methylnaltrexone or quaternary derivative is administered orally in an enterically coated form.

The invention generally provides processes and intermediate compounds useful for the production of (+)-opiates. Non-limiting examples of (+) opiates that may be derived from one or more compounds of the invention include (+)-noroxymorphone, (+)-naltrexone, (+)-naloxone, (+)-N-cyclopropylmethylnorhydrocodone, (+)-N-cycloproylmethylnorhydromorphone, (+)-N-allylnorhydrocodone, (+)-N-allylnorhydromorphone, (+)-noroxycodone, (+)-naltrexol, (+)-naloxol, and (+)-3-O-methyl-naltrexone.

Methods and compositions for treating post-surgical gastrointestinal dysfunction are provided. Methods include administering a quaternary derivative of noroxymorphone (e.g., methylnaltrexone) to a patient after a segmental colectomy is performed on the patient.

Systems and methods are described for using methylnaltrexone to treat or prevent inhibition of gastrointestinal motility in equines. A method for preventing or treating opioid-induced and non-opioid-induced gastrointestinal dysfunction includes administering a quaternary derivative of noroxymorphone, preferably methylnaltrexone, to an equine before or after the onset of the gastrointestinal dysfunction.

Stable pharmaceutical compositions useful for administering methylnaltrexone are described, as are methods for making the same. Kits, including these pharmaceutical compositions, also are provided.

Stable pharmaceutical compositions useful for administering methylnaltrexone are described, as are methods for making the same. Kits, including these pharmaceutical compositions, also are provided.

The invention provides a method for separating and determining methyhaaltrexone bromide and impurities and contents thereof with liquid chromatography. The method comprises the following steps: (a) adopting a chromatographic column using alkyl-silicane bonded silica gels as packing to be a separation column; (b) using a trifluoroacetic acid buffer solution as a flowing phase A, and using an organic solvent as a flowing phase B; and (c) and adopting gradient elution for the flowing phases, and separating and determining the impurities and contents of methyhaaltrexone bromide and a preparation thereof. According to the method, methyhaaltrexone and other known intermediate impurities as well as unknown impurities can be effectively separated and determined. The method has strong specificity, high accuracy and convenience for operation.