Abstract:
:A general objective of drug-drug interaction (DDI) studies is to determine whether potential interactions of new molecular entities with concomitantly administered other drugs exist and, if DDIs occur, whether dosage adjustments are required. A typical end point for DDI evaluations is the ratio of area under the plasma concentration-time curve (AUC) of substrate drugs (AUCR), whereas the ratios of maximal plasma concentration (Cmax ) and terminal half-life (t1/2 ) are also important to understand DDI mechanisms (Cmax R and t1/2 R, respectively). Because changes in substrate AUC by precipitant drugs ultimately result from alterations of Cmax and t1/2 , AUCR can be considered a hybrid parameter of Cmax R and t1/2 R, for example, AUCR ≈ Cmax R × t1/2 R. The primary objective of this study was to investigate the relationships between AUCR, Cmax R, and t1/2 R in physiologically based pharmacokinetic model-predicted and clinically observed DDI results. First, the model-predicted results showed the excellent proportional relationship between AUCR and (Cmax R × t1/2 R) in DDI results of virtual substrates having a wide range of oral bioavailability with coadministration of ketoconazole, ritonavir, and rifampin. Second, the reasonable proportional relationships were also observed in the clinically observed DDI results of midazolam and statins (atorvastatin, cerivastatin, fluvastatin, lovastatin, pitavastatin, pravastatin, rosuvastatin, and simvastatin) with various inhibitors and inducers. Finally, these results suggest that utilization of the proportional relationship between AUCR and (Cmax R × t1/2 R) can provide an additional framework to further interpret DDI results reasonably and clearly. Furthermore, the proportional relationship can be purposely used to assess study design and pharmacokinetic analyses in DDI studies.
journal_name
J Clin Pharmacoljournal_title
Journal of clinical pharmacologyauthors
Yamazaki Sdoi
10.1002/jcph.1104subject
Has Abstractpub_date
2018-08-01 00:00:00pages
1053-1060issue
8eissn
0091-2700issn
1552-4604journal_volume
58pub_type
杂志文章abstract::L- and T-type voltage-dependent transmembrane calcium channels are important for normal functioning of the cardiovascular system. T-type channels are a heterogeneous group, and have physiologic and pathophysiologic relevance in a number of organ systems, including the heart and central nervous system. They appear to b...
journal_title:Journal of clinical pharmacology
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abstract::The pharmacokinetics and pharmacodynamics of verapamil were investigated in six chronic hemodialysis patients. A single oral 120-mg dose was administered both on a non-hemodialysis day and a hemodialysis day separated by greater than or equal to 7 days. Blood pressure and PR interval were measured simultaneously with ...
journal_title:Journal of clinical pharmacology
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abstract::The safety and efficacy of intravenous (i.v.) torsemide as adjunctive therapy for acute cardiogenic pulmonary edema was evaluated. Thirteen patients were treated with i.v. torsemide and six patients, with i.v. furosemide, as a positive control. Doses of torsemide, 20 mg or 40 mg, and furosemide, 40 mg or 80 mg, were a...
journal_title:Journal of clinical pharmacology
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abstract::Compared with aminoglycosides, chloramphenicol, sulfonamides, tetracyclines, and even penicillins, the cephalosporins represent a remarkably safe class of antibiotics. Among the cephalosporins, the extended spectrum, third generation agents developed generally produce few side effects and appear to be less allergenic ...
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abstract::This study evaluated the safety, pharmacokinetics (PK), and pharmacodynamics (PD) of a novel depot formulation of abarelix, a new gonadotropin-releasing hormone (GnRH) antagonist. This was an open-label, sequential two-phase study in healthy male subjects ages 50 to 75. Subjects received a single intramuscular (IM) do...
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abstract::Anisotropine methyl bromide, an anticholinergic, 80 mg given orally at 8 P.M., suppresses gastric acid secretion through the night without significant side effects. Thirty patients with endoscopy-proved symptomatic duodenal ulcer disease completed a randomized, double-blind, placebo-controlled trial of nighttime aniso...
journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
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abstract::Steady-state inhibitory activity of rofecoxib (Vioxx) on COX-2 versus COX-1 was compared with that of commonly used nonsteroidal anti-inflammatory drugs (NSAIDs) in 76 healthy volunteers randomized to placebo, rofecoxib 12.5 mg qd, rofecoxib 25 mg qd, diclofenac 50 mg tid, ibuprofen 800 mg tid, sodium naproxen 550 mg ...
journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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abstract::Cholestyramine is a nonabsorbable anion exchange resin that is used predominantly for the treatment of hypercholesterolemia in adults and the management of acute diarrhea in children. The authors report two cases of severe hyperchloremic nonanion gap metabolic acidosis associated with the use of cholestyramine therapy...
journal_title:Journal of clinical pharmacology
pub_type: 杂志文章,评审
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journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
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journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
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journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
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abstract::Fifteen healthy women participated in a study to determine the effect of multiple doses of troglitazone on the pharmacokinetics of Ortho-Novum 1/35 (35 micrograms ethinyl estradiol [EE] and 1 mg norethindrone [NE]). Participants received three cycles (21 days each of active drug followed by 7 days without medication) ...
journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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abstract::Floctafenin (FFn), 2,3-dihydroxypropyl--N--(8--trifluoromethyl--4--quinolyl) anthranilate, a new nonnarcotic analgesic drug, was studied in man, mice, and the isolated perfused rat liver. In all species the drug is rapidly hydrolyzed to floctafenic acid (FFa). In seven volunteer subjects who each received a single ora...
journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1002/j.1552-4604.1979.tb01613.x
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abstract::For more than a decade, first responders and the general public have been able to treat suspected opioid overdoses using an improvised nasal naloxone device (INND) constructed from a prefilled syringe containing 2 mg of naloxone (1 mg/mL) attached to a mucosal atomization device. In recent years, the U.S. Food and Dru...
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pub_type: 杂志文章,随机对照试验
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journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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journal_title:Journal of clinical pharmacology
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journal_title:Journal of clinical pharmacology
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journal_title:Journal of clinical pharmacology
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journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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abstract::Buprenorphine administered sublingually is a promising treatment for opiate dependence. Utilizing a new, sensitive, and specific gas chromatographic electron-capture detector assay, the absolute bioavailability of sublingual buprenorphine was determined in six healthy volunteers by comparing plasma concentrations afte...
journal_title:Journal of clinical pharmacology
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journal_title:Journal of clinical pharmacology
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doi:10.1002/j.1552-4604.1989.tb03335.x
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abstract::In the analysis of longitudinal pharmacokinetic data, both balanced (equal number of samples per subject) and unbalanced data are used. It is implicitly assumed that the process that caused the missing data can be ignored. A simulation study was performed to determine the effect of ignoring the missing data (i.e., "ig...
journal_title:Journal of clinical pharmacology
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abstract::Pharmacokinetic studies of i.v. and oral racemic verapamil and 14C-erythromycin breath tests (ERBT) were performed in 84 healthy men (n = 42) and women (n = 42). Verapamil was measured by HPLC, concentration versus time data were analyzed by noncompartmental models, protein binding was measured by equilibrium dialysis...
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journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
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abstract::To determine the elimination of high-molecular-weight hydroxyethyl starch (HES, Mw 450,000) in normal subjects, ten volunteers were given 500 ml 6% HES solution by intravenous infusion, and serial blood and urine samples were collected for nonglucose total carbohydrate determination. On the average, 46 and 64 per cent...
journal_title:Journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1002/j.1552-4604.1982.tb02164.x
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abstract::The centrally acting agents are one of several differing classes of drugs now available for antihypertensive therapy. The availability of newer pharmacologic classes, including the beta-blockers, alpha-blockers. ACE inhibitors and calcium channel blockers, has resulted in a relative decline in the use of the centrally...
journal_title:Journal of clinical pharmacology
pub_type: 杂志文章,评审
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abstract::ABT-761 is a second-generation 5-lipoxygenase inhibitor in clinical development for the treatment of asthma. The effects of ABT-761 on the pharmacokinetics of an oral contraceptive were assessed in 21 female adult volunteers in a phase I, multiple-dose, open-label study. Subjects received a single dose of oral contrac...
journal_title:Journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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更新日期:1998-07-01 00:00:00