Effect of omeprazole on oral and intravenous RS‐methadone pharmacokinetics and pharmacodynamics in the rat

The effect of omeprazole on oral and intravenous (iv) RS‐methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS‐methadone (3 mg/kg) was given (a) to a control group (COoral) (n = 65) and (b) to an omeprazole pretreated gro...

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Published inJournal of pharmaceutical sciences Vol. 91; no. 7; pp. 1627 - 1638
Main Authors Carlos, M. Angeles, Souich, Patrick Du, Carlos, Raimundo, Suarez, Elena, Lukas, John C., Calvo, Rosario
Format Journal Article
LanguageEnglish
Published New York Elsevier Inc 01.07.2002
Wiley Subscription Services, Inc., A Wiley Company
Wiley
American Pharmaceutical Association
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ISSN0022-3549
1520-6017
DOI10.1002/jps.10031

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Abstract The effect of omeprazole on oral and intravenous (iv) RS‐methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS‐methadone (3 mg/kg) was given (a) to a control group (COoral) (n = 65) and (b) to an omeprazole pretreated group (OPoral) (n = 77), and iv RS‐methadone (0.35 mg/kg) was administered (c) to a control group (COiv) (n = 86) and (d) to an omeprazole pretreated group (OPiv) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS‐methadone. Plasma concentrations of RS‐methadone (Cp) were determined by high‐performance liquid chromatography and analgesic response by tail flick for 0–180min (oral) and 0–120min (iv). RS‐Methadone rate of absorption (mean ± SE) was faster in OPoral (k01 = 0.31 ± 0.04min−1) than in COoral (k01 = 0.05 ± 0.007min−1), consequently plasma peak concentrations (Cmax) were greater (197.41 ± 33.70 ng/mL versus 83.54 ± 7.97 ng/mL) and the time to reach Cmax (tmax) was shorter (11.23 ± 1.32min versus 39.18 ± 1.74min). Mean area under the Cp‐time curve (AUC0–∞) and hence bioavailability of oral RS‐methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS‐methadone. The changes of the analgesic effect of RS‐methadone as a function of time were similar in all four groups. In the COoral group, Cp and analgesic effect were defined by the Emax model. The relationship between Cp and drug effect in the OPoral group showed a counterclockwise hysteresis (ke0 of 0.018 ± 0.006min−1). For the iv groups (COiv and OPiv), the Cp‐analgesic effect relationship was described by an Emax sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS‐methadone without modifying the analgesic response but affecting the Cp‐effect relationship. © 2002 Wiley‐Liss Inc. and the American Pharmaceutical Association J Pharm Sci 91:1627–1638, 2002
AbstractList The effect of omeprazole on oral and intravenous (iv) RS-methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS-methadone (3 mg/kg) was given (a) to a control group (CO(oral)) (n = 65) and (b) to an omeprazole pretreated group (OP(oral)) (n = 77), and iv RS-methadone (0.35 mg/kg) was administered (c) to a control group (CO(iv)) (n = 86) and (d) to an omeprazole pretreated group (OP(iv)) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS-methadone. Plasma concentrations of RS-methadone (Cp) were determined by high-performance liquid chromatography and analgesic response by tail flick for 0-180 min (oral) and 0-120 min (iv). RS-Methadone rate of absorption (mean +/- SE) was faster in OP(oral) (k(01) = 0.31 +/- 0.04 min(-1)) than in CO(oral) (k(01) = 0.05 +/- 0.007 min(-1)), consequently plasma peak concentrations (C(max)) were greater (197.41 +/- 33.70 ng/mL versus 83.54 +/- 7.97 ng/mL) and the time to reach C(max) (t(max)) was shorter (11.23 +/- 1.32 min versus 39.18 +/- 1.74 min). Mean area under the Cp-time curve (AUC(0-infinity)) and hence bioavailability of oral RS-methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS-methadone. The changes of the analgesic effect of RS-methadone as a function of time were similar in all four groups. In the CO(oral) group, Cp and analgesic effect were defined by the E(max) model. The relationship between Cp and drug effect in the OP(oral) group showed a counterclockwise hysteresis (k(e0) of 0.018 +/- 0.006 min(-1)). For the iv groups (CO(iv) and OP(iv)), the Cp-analgesic effect relationship was described by an E(max) sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS-methadone without modifying the analgesic response but affecting the Cp-effect relationship.
The effect of omeprazole on oral and intravenous (iv) RS-methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS-methadone (3 mg/kg) was given (a) to a control group (CO(oral)) (n = 65) and (b) to an omeprazole pretreated group (OP(oral)) (n = 77), and iv RS-methadone (0.35 mg/kg) was administered (c) to a control group (CO(iv)) (n = 86) and (d) to an omeprazole pretreated group (OP(iv)) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS-methadone. Plasma concentrations of RS-methadone (Cp) were determined by high-performance liquid chromatography and analgesic response by tail flick for 0-180 min (oral) and 0-120 min (iv). RS-Methadone rate of absorption (mean +/- SE) was faster in OP(oral) (k(01) = 0.31 +/- 0.04 min(-1)) than in CO(oral) (k(01) = 0.05 +/- 0.007 min(-1)), consequently plasma peak concentrations (C(max)) were greater (197.41 +/- 33.70 ng/mL versus 83.54 +/- 7.97 ng/mL) and the time to reach C(max) (t(max)) was shorter (11.23 +/- 1.32 min versus 39.18 +/- 1.74 min). Mean area under the Cp-time curve (AUC(0-infinity)) and hence bioavailability of oral RS-methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS-methadone. The changes of the analgesic effect of RS-methadone as a function of time were similar in all four groups. In the CO(oral) group, Cp and analgesic effect were defined by the E(max) model. The relationship between Cp and drug effect in the OP(oral) group showed a counterclockwise hysteresis (k(e0) of 0.018 +/- 0.006 min(-1)). For the iv groups (CO(iv) and OP(iv)), the Cp-analgesic effect relationship was described by an E(max) sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS-methadone without modifying the analgesic response but affecting the Cp-effect relationship.The effect of omeprazole on oral and intravenous (iv) RS-methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS-methadone (3 mg/kg) was given (a) to a control group (CO(oral)) (n = 65) and (b) to an omeprazole pretreated group (OP(oral)) (n = 77), and iv RS-methadone (0.35 mg/kg) was administered (c) to a control group (CO(iv)) (n = 86) and (d) to an omeprazole pretreated group (OP(iv)) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS-methadone. Plasma concentrations of RS-methadone (Cp) were determined by high-performance liquid chromatography and analgesic response by tail flick for 0-180 min (oral) and 0-120 min (iv). RS-Methadone rate of absorption (mean +/- SE) was faster in OP(oral) (k(01) = 0.31 +/- 0.04 min(-1)) than in CO(oral) (k(01) = 0.05 +/- 0.007 min(-1)), consequently plasma peak concentrations (C(max)) were greater (197.41 +/- 33.70 ng/mL versus 83.54 +/- 7.97 ng/mL) and the time to reach C(max) (t(max)) was shorter (11.23 +/- 1.32 min versus 39.18 +/- 1.74 min). Mean area under the Cp-time curve (AUC(0-infinity)) and hence bioavailability of oral RS-methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS-methadone. The changes of the analgesic effect of RS-methadone as a function of time were similar in all four groups. In the CO(oral) group, Cp and analgesic effect were defined by the E(max) model. The relationship between Cp and drug effect in the OP(oral) group showed a counterclockwise hysteresis (k(e0) of 0.018 +/- 0.006 min(-1)). For the iv groups (CO(iv) and OP(iv)), the Cp-analgesic effect relationship was described by an E(max) sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS-methadone without modifying the analgesic response but affecting the Cp-effect relationship.
The effect of omeprazole on oral and intravenous (iv) RS‐methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS‐methadone (3 mg/kg) was given (a) to a control group (COoral) (n = 65) and (b) to an omeprazole pretreated group (OPoral) (n = 77), and iv RS‐methadone (0.35 mg/kg) was administered (c) to a control group (COiv) (n = 86) and (d) to an omeprazole pretreated group (OPiv) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS‐methadone. Plasma concentrations of RS‐methadone (Cp) were determined by high‐performance liquid chromatography and analgesic response by tail flick for 0–180min (oral) and 0–120min (iv). RS‐Methadone rate of absorption (mean ± SE) was faster in OPoral (k01 = 0.31 ± 0.04min−1) than in COoral (k01 = 0.05 ± 0.007min−1), consequently plasma peak concentrations (Cmax) were greater (197.41 ± 33.70 ng/mL versus 83.54 ± 7.97 ng/mL) and the time to reach Cmax (tmax) was shorter (11.23 ± 1.32min versus 39.18 ± 1.74min). Mean area under the Cp‐time curve (AUC0–∞) and hence bioavailability of oral RS‐methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS‐methadone. The changes of the analgesic effect of RS‐methadone as a function of time were similar in all four groups. In the COoral group, Cp and analgesic effect were defined by the Emax model. The relationship between Cp and drug effect in the OPoral group showed a counterclockwise hysteresis (ke0 of 0.018 ± 0.006min−1). For the iv groups (COiv and OPiv), the Cp‐analgesic effect relationship was described by an Emax sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS‐methadone without modifying the analgesic response but affecting the Cp‐effect relationship. © 2002 Wiley‐Liss Inc. and the American Pharmaceutical Association J Pharm Sci 91:1627–1638, 2002
The effect of omeprazole on oral and intravenous (iv) RS‐methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were divided in four groups: oral RS‐methadone (3 mg/kg) was given (a) to a control group (COoral) (n = 65) and (b) to an omeprazole pretreated group (OPoral) (n = 77), and iv RS‐methadone (0.35 mg/kg) was administered (c) to a control group (COiv) (n = 86) and (d) to an omeprazole pretreated group (OPiv) (n = 86). Omeprazole (2 mg/kg) was given iv 2 h before RS‐methadone. Plasma concentrations of RS‐methadone (Cp) were determined by high‐performance liquid chromatography and analgesic response by tail flick for 0–180 min (oral) and 0–120 min (iv). RS‐Methadone rate of absorption (mean ± SE) was faster in OPoral (k01 = 0.31 ± 0.04 min−1) than in COoral (k01 = 0.05 ± 0.007 min−1), consequently plasma peak concentrations (Cmax) were greater (197.41 ± 33.70 ng/mL versus 83.54 ± 7.97 ng/mL) and the time to reach Cmax (tmax) was shorter (11.23 ± 1.32 min versus 39.18 ± 1.74 min). Mean area under the Cp‐time curve (AUC0–∞) and hence bioavailability of oral RS‐methadone were increased by omeprazole without significant changes in the elimination. Omeprazole did not affect the pharmacokinetics of iv RS‐methadone. The changes of the analgesic effect of RS‐methadone as a function of time were similar in all four groups. In the COoral group, Cp and analgesic effect were defined by the Emax model. The relationship between Cp and drug effect in the OPoral group showed a counterclockwise hysteresis (ke0 of 0.018 ± 0.006 min−1). For the iv groups (COiv and OPiv), the Cp‐analgesic effect relationship was described by an Emax sigmoid model and omeprazole did not affect the pharmacodynamic parameters. It is concluded that omeprazole causes an increase in the bioavailability of oral RS‐methadone without modifying the analgesic response but affecting the Cp‐effect relationship. © 2002 Wiley‐Liss Inc. and the American Pharmaceutical Association J Pharm Sci 91:1627–1638, 2002
Author Carlos, M. Angeles
Lukas, John C.
Calvo, Rosario
Souich, Patrick Du
Carlos, Raimundo
Suarez, Elena
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Issue 7
Keywords pharmacokinetics
omeprazole
methadone
analgesia
Stomach
Pharmacokinetic pharmacodynamic relationship
Drug combination
Intravenous administration
Rat
Digestive system
Rodentia
Oral administration
Opiates
Antiulcer agent
Methadone
Blood
Proton pump inhibitor
Blood plasma
Omeprazole
Vertebrata
Mammalia
Analgesic
Benzimidazole derivatives
Animal
pH
Drug interaction
Pharmacokinetics
Language English
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1998; 26
1996; 18
1996; 17
1991; 37
1997; 44
1991; 32
1973; 185
1995; 56
1999; 27
1999; 48
1999; 47
1996; 50
1996; 52
1999; 65
1991
1999; 288
1976; 28
1992; 34
1991; 8
1981; 20
1993; 5
1991; 5
1976; 54
1941; 72
1989; 11
1990; 45
1997; 70
1987; 41
1986; 40
1990; 47
1997; 11
1991; 21
1993; 52
1982; 22
1999; 13
1997; 39
1984; 18
1994; 37
1995; 29
1981; 217
1992; 42
1992; 43
1994; 309
Giraud (10.1002/jps.10031_bb0095) 1997; 11
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Soons (10.1002/jps.10031_bb0115) 1992; 42
Ling (10.1002/jps.10031_bb0140) 1981; 217
Kristensen (10.1002/jps.10031_bb0145) 1995; 56
Andersson (10.1002/jps.10031_bb0125) 1991; 21
Inturrisi (10.1002/jps.10031_bb0040) 1987; 41
Zhang (10.1002/jps.10031_bb0215) 1999; 27
Gibaldi (10.1002/jps.10031_bb0050) 1991
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Tucker (10.1002/jps.10031_bb0165) 1990; 45
Fainsinger (10.1002/jps.10031_bb0025) 1993; 52
Teng (10.1002/jps.10031_bb0100) 1997; 39
Sommers (10.1002/jps.10031_bb0110) 1992; 43
Dyer (10.1002/jps.10031_bb0035) 1999; 65
Unadkat (10.1002/jps.10031_bb0090) 1986; 40
Julkunen (10.1002/jps.10031_bb0205) 1976; 54
Sutfin (10.1002/jps.10031_bb0195) 1989; 11
Eap (10.1002/jps.10031_bb0160) 1990; 47
Julkunen (10.1002/jps.10031_bb0210) 1976; 28
Unge (10.1002/jps.10031_bb0200) 1992; 34
Oosterhuis (10.1002/jps.10031_bb0105) 1991; 32
Hansten (10.1002/jps.10031_bb0120) 1991; 5
Gibaldi (10.1002/jps.10031_bb0185) 1993; 5
Wolff (10.1002/jps.10031_bb0015) 1997; 44
D'Amour (10.1002/jps.10031_bb0085) 1941; 72
Flockhart (10.1002/jps.10031_bb0130) 1995; 29
Kristensen (10.1002/jps.10031_bb0055) 1996; 18
Garrido (10.1002/jps.10031_bb0080) 1999; 288
Hayball (10.1002/jps.10031_bb0190) 1994; 37
Ripamonti (10.1002/jps.10031_bb0030) 1997; 70
Rostami‐Hodjegan (10.1002/jps.10031_bb0045) 1999; 48
Kristensen (10.1002/jps.10031_bb0155) 1996; 18
Levy (10.1002/jps.10031_bb0170) 1991; 8
Meresaar (10.1002/jps.10031_bb0010) 1981; 20
Foster (10.1002/jps.10031_bb0065) 1999; 47
Wolff (10.1002/jps.10031_bb0075) 1991; 37
Eap (10.1002/jps.10031_bb0180) 1996; 50
Bouer (10.1002/jps.10031_bb0220) 1999; 13
Farrell (10.1002/jps.10031_bb0020) 1994; 309
Hutt (10.1002/jps.10031_bb0175) 1996; 52
Nilsson (10.1002/jps.10031_bb0060) 1982; 22
De Castro (10.1002/jps.10031_bb0070) 1996; 17
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Snippet The effect of omeprazole on oral and intravenous (iv) RS‐methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were...
The effect of omeprazole on oral and intravenous (iv) RS-methadone pharmacokinetics and pharmacodynamics was studied in awake, freely moving rats, which were...
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SubjectTerms Administration, Oral
analgesia
Analgesics
Animals
Biological and medical sciences
Digestive system
Drug Synergism
Female
Injections, Intravenous
Medical sciences
methadone
Methadone - administration & dosage
Methadone - blood
Methadone - pharmacokinetics
Neuropharmacology
omeprazole
Omeprazole - pharmacokinetics
Omeprazole - pharmacology
Pain Measurement - drug effects
pharmacokinetics
Pharmacology. Drug treatments
Rats
Rats, Sprague-Dawley
Title Effect of omeprazole on oral and intravenous RS‐methadone pharmacokinetics and pharmacodynamics in the rat
URI https://dx.doi.org/10.1002/jps.10031
https://api.istex.fr/ark:/67375/WNG-2JJC0P7N-P/fulltext.pdf
https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fjps.10031
https://www.ncbi.nlm.nih.gov/pubmed/12115824
https://www.proquest.com/docview/71898925
Volume 91
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