"For the relief of moderate to severe pain."@en . . . "illicit"@en . "Serum protein binding is approximately 80%."@en . . . " "@en . . . . . . . . "# Gear RW, Miaskowski C, Gordon NC, Paul SM, Heller PH, Levine JD: The kappa opioid nalbuphine produces gender- and dose-dependent analgesia and antianalgesia in patients with postoperative pain. Pain. 1999 Nov;83(2):339-45. \"Pubmed\":http://www.ncbi.nlm.nih.gov/pubmed/10534607 # Fan LW, Tanaka S, Tien LT, Ma T, Rockhold RW, Ho IK: Withdrawal from dependence upon butorphanol uniquely increases kappa(1)-opioid receptor binding in the rat brain. Brain Res Bull. 2002 Jun;58(2):149-60. \"Pubmed\":http://www.ncbi.nlm.nih.gov/pubmed/12127012"@en . . . . . . "Butorphanol"@en . . . . . . . . . . . . . . . . . . . "* 305 to 901 L"@en . . . . . . . . . . . . . . . . "(-)-N-Cyclobutylmethyl-3,14-dihydroxymorphinan"@en . . . "The clinical manifestations of butorphanol overdose are those of opioid drugs in general. The most serious symptoms are hypoventilation, cardiovascular insufficiency, coma, and death."@en . . . . . . . . . "Avoid alcohol."@en . . " "@en . . . "The elimination half-life of butorphanol is about 18 hours. In renally impaired patients with creatinine clearances <30 mL/min the elimination half-life is approximately doubled. After intravenous administration to patients with hepatic impairment, the elimination half-life of butorphanol was approximately tripled."@en . . "Humans and other mammals"@en . . . "Butorphanol"@en . . . . "Butorfanol"@en . "42408-82-2"@en . . . . "approved"@en . . . . "(-)-17-(Cyclobutylmethyl)morphinan-3,14-diol"@en . . . . . . . . "A synthetic morphinan analgesic with narcotic antagonist action. It is used in the management of severe pain. [PubChem]"@en . . "Butorphanol is extensively metabolized in the liver. Elimination occurs by urine and fecal excretion."@en . . . . "The exact mechanism of action is unknown, but is believed to interact with an opiate receptor site in the CNS (probably in or associated with the limbic system). The opiate antagonistic effect may result from competitive inhibition at the opiate receptor, but may also be a result of other mechanisms. Butorphanol is a mixed agonist-antagonist that exerts antagonistic or partially antagonistic effects at mu opiate receptor sites, but is thought to exert its agonistic effects principally at the kappa and sigma opiate receptors."@en . . "Monkovic, I. and Conway, T.T.; U.S. Patent 3,775,414; November 27,1973; Monkovic, I.,Wong, H. and Lim, G.; U.S. Patent 3,980,641; September 14, 1976; Pachter, IJ., Belleau, B.R. and Monkovic, I.; U.S. Patent 3,819,635; June 25,1974; and Lim, G. and Hooper, J.W.; U.S. Patent 4,017,497; April 12,1977; all assigned to Bristol-Myers Company."@en . . "(-)-Butorphanol"@en . "Butorphanolum"@en . "Rapidly absorbed after intramuscular injection and peak plasma levels are reached in 20-40 minutes. The absolute bioavailability is 60-70% and is unchanged in patients with allergic rhinitis. In patients using a nasal vasoconstrictor (oxymetazoline) the fraction of the dose absorbed was unchanged, but the rate of absorption was slowed. Oral bioavailability is only 5-17% because of extensive first-pass metabolism."@en . "* 99 +/- 23 L/h [Young with IV 2 mg] * 82 +/- 21 [Eldery with IV 2 mg]"@en .