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Biological half-life

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Following i.v. administration, the terminal half-life is the time required for plasma/blood concentration to decrease by 50% after pseudo-equilibrium of distribution has been reached; then, terminal half-life is computed when the decrease in drug plasma concentration is due only to drug elimination,
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effects in humans. In addition, unlike the case of peripheral administration, intranasal oxytocin has a central duration of at least 2.25 hours and as long as 4 hours. In likely relation to this fact, endogenous oxytocin concentrations in the brain have been found to be as much as 1000-fold higher
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Recent studies also highlight remarkable anxiolytic and prosocial effects of intranasally administered OT in humans, including increased 'trust', decreased amygdala activation towards fear-inducing stimuli, improved recognition of social cues and increased gaze directed towards the eye regions of
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The half-life of a drug is the time required for the serum concentration to be reduced by 50%. Once the half-life of the drug is known, the time required for clearance can be estimated. Approximately 97% of the drug is eliminated by 5 halflives, while ~99% is eliminated by 7
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Oxytocin can be delivered to humans via nasal spray following which it crosses the blood–brain barrier. ... In a double-blind experiment, oxytocin spray increased trusting behavior compared to a placebo spray in a monetary game with real money at
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In clinical practice, this means that it takes 4 to 5 times the half-life for a drug's serum concentration to reach steady state after regular dosing is started, stopped, or the dose changed. So, for example, digoxin has a half-life (or
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because it helps determine how much of a drug needs to be taken and how frequently it needs to be taken if a certain average amount is needed constantly. By contrast, the stability of a substance in plasma is described as
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Huffmeijer R, Alink LR, Tops M, Grewen KM, Light KC, Bakermans-Kranenburg MJ, Ijzendoorn MH (2012). "Salivary levels of oxytocin remain elevated for more than two hours after intranasal oxytocin administration".
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For some substances, it is important to think of the human or animal body as being made up of several parts, each with their own affinity for the substance, and each part with a different biological half-life
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Plasma donepezil concentrations decline with a half-life of approximately 70 h. Sex, race, and smoking history have no clinically significant influence on plasma concentrations of donepezil .
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The relationship between the biological and plasma half-lives of a substance can be complex depending on the substance in question, due to factors including accumulation in tissues,
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Time course of drug plasma concentrations over 96 hours following oral administrations every 24 hours (Ď„). Absorption half-life 1 h, elimination half-life 12 h.
1385:) of 24–36 h; this means that a change in the dose will take the best part of a week to take full effect. For this reason, drugs with a long half-life (e.g., 1668:
and the term 'elimination half-life' is applicable. Therefore, it is not the time necessary for the amount of the administered drug to fall by one half.
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SHALLOW part of curve —> ultimate excretion of drug, which is dependent on the release of the drug from tissue compartments into the blood.
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The elimination half-life measures the kinetics of loss of drug from the body as a whole once all distribution equilibria have been achieved.
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will reduce the biological half-life of water in the body. This has been used to decontaminate patients who are internally contaminated with
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The biological half-life of water in a human is about 7 to 14 days. It can be altered by behavior. Drinking large amounts of
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can be treated in the same way. Half life is also relative to the subjective metabolic rate of the individual in question.
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Nikolas C Papanikolaou; Eleftheria G Hatzidaki; Stamatis Belivanis; George N Tzanakakis; Aristidis M Tsatsakis (2005).
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of the measured substance through the kidneys and intestines. This concept is used when the rate of removal is roughly
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Weisman O, Zagoory-Sharon O, Feldman R (2012). "Intranasal oxytocin administration is reflected in human saliva".
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is the slope of the terminal phase of the time–concentration curve for the substance on a semilogarithmic scale.
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Handbook of Essential Pharmacokinetics, Pharmacodynamics and Drug Metabolism for Industrial Scientists
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Dasgupta, Amitava; Krasowski, Matthew D. (2020). "Pharmacokinetics and therapeutic drug monitoring".
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Chan, Patrick; Uchizono, James A. (2015). "Pharmacokinetics and Pharmacodynamics of Anesthetics".
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Malenka RC, Nestler EJ, Hyman SE (2009). "Chapter 7: Neuropeptides". In Sydor A, Brown RY (eds.).
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in humans when given via this route. In contrast to peripheral administration, when administered
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others (Kirsch et al., 2005; Kosfeld et al., 2005; Domes et al., 2006; Guastella et al., 2008)
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Many drugs follow a biphasic elimination curve — first a steep slope then a shallow slope:
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Some substances may have different half-lives in different parts of the body. For example,
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from the human body is limited. Hence the removal of a large concentration of alcohol from
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in humans is between one and four months. This can be shortened by feeding the person
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STEEP (initial) part of curve —> initial distribution of the drug in the body.
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from the body. Typically, the biological half-life refers to the body's natural
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In a medical context, half-life explicitly describes the time it takes for the
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where the rate of elimination is proportional to the amount of the substance:
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Half-times apply to processes where the elimination rate is exponential. If
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Essentials of Pharmacology for Anesthesia, Pain Medicine, and Critical Care
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very poorly, although very small amounts (< 1%) do appear to enter the
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This is essential to ensure accurate analysis of drugs in plasma and for
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Toutain, P. L.; Bousquet-Melou, A. (2004). "Plasma terminal half-life".
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in the human body can be prevented by giving an appropriate amount of
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Frymoyer, Adam (2019). "Pharmacokinetic Considerations in Neonates".
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Miles Hacker; William S. Messer; Kenneth A. Bachmann (19 June 2009).
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Curry, Stephen H. (1993). "PHARMACOKINETICS OF ANTIPSYCHOTIC DRUGS".
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Molecular Neuropharmacology: A Foundation for Clinical Neuroscience
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in the body has a biological half-life of about one to four months.
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Time taken for a drug to halve its concentration in blood plasma
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Profiles of Drug Substances, Excipients and Related Methodology
1943:"Prescribing Methadone for Pain Management in End-of-Life Care" 1284:) and the relationship is described by the following equation: 2183:"Sirturo (bedaquiline) Tablets. Full Prescribing Information" 2322:(2nd ed.). New York: McGraw-Hill Medical. p. 195. 506:. The prussian blue in the digestive system acts as a solid 154:) its steady-state when circulating in the full blood of an 2057:
Asiri, Yousif A.; Mostafa, Gamal A.E. (2010). "Donepezil".
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in the liver has a biological half-life of about 40 years.
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and the half-life of the largest component is called the
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of typically about three minutes in the blood when given
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Cambridge textbook of effective treatments in psychiatry
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to achieve their desired clinical effect more quickly.
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in bone has a biological half-life of about 100 years.
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This is used to measure the removal of things such as
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in bone has a biological half-life of about 30 years.
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Journal of Veterinary Pharmacology and Therapeutics
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Journal of Veterinary Pharmacology and Therapeutics
2259:Baribeau, Danielle A; Anagnostou, Evdokia (2015). 1355: 1251: 1184: 1121: 1051: 987: 967: 103: 625:via a nasal spray, oxytocin reliably crosses the 182:, active metabolites, and receptor interactions. 564:Lead in the blood has a half life of 28–36 days. 2585:. Arlington, VA: AAPS Press. pp. 237–239. 2347:McGregor IS, Callaghan PD, Hunt GE (May 2008). 1947:Journal of the American Osteopathic Association 1504: 1502: 561:) in the body has a half-life of about 65 days. 520:physiologically-based pharmacokinetic modelling 239:. In this way the oxidation of methanol to the 1715:. Demos Medical Publishing, LLC. p. 251. 574:has a biological half-life of about ten years. 2687: 2246:Rabinowitz et al. 1976 as cited in ATSDR 2005 2107: 2105: 1903: 1901: 1440:Pharmacokinetics § Multi-compartmental models 1407:of about 58 days) are usually started with a 477:21–35 days (under continuous administration) 8: 2061:. Vol. 35. Elsevier. pp. 117–150. 975:is the concentration of a substance at time 258:methanol. Methanol is very toxic and causes 2581:Bonate, Peter L.; Howard, Danny R. (2004). 1982: 1980: 1818:"Pharmacokinetics of oxaliplatin in humans" 1627:Toutain, P. L.; Bousquet-Melou, A. (2004). 440:4–6 days (under continuous administration) 51:) is the time taken for concentration of a 3454: 3414: 3319: 3292: 3256: 3219: 3180: 3107: 3052: 2982: 2927: 2876: 2838: 2760: 2715: 2694: 2680: 2672: 2237:Griffin et al. 1975 as cited in ATSDR 2005 1816:Ehrsson, Hans; et al. (Winter 2002). 1761:Silk, Kenneth R.; Tyrer, Peter J. (2008). 1545:Antipsychotic Drugs and their Side-Effects 658: 510:which absorbs the caesium while releasing 158:. This measurement is useful in medicine, 2576: 2574: 2572: 2372: 2294: 2276: 2148:. Sanofi Genzyme, Cambridge, MA, Dec 2016 2033:"Klonopin (clonazepam) Prescribing Guide" 1352: 1334: 1329: 1315: 1312: 1298: 1292: 1248: 1240: 1223: 1209: 1203: 1181: 1160: 1146: 1140: 1084: 1082: 1048: 1036: 1003: 980: 951: 660:Timeline of an exponential decay process 90: 84: 273: 215:(drinking alcohol) through oxidation by 1468: 150:concentration of a substance to halve ( 2209:"Lead toxicity update. A brief review" 2478:Pharmacology: Principles and Practice 2112: 2017: 1987: 1908: 1890: 1875: 1195:Alternatively, half-life is given by 1122:{\displaystyle {\frac {dC}{dt}}=-kC.} 262:and death. A person who has ingested 7: 1740:. Amsterdam: Elsevier. p. 119. 1738:Handbook on the toxicology of metals 1438:For a more detailed description see 78:. It is denoted by the abbreviation 2504:Infectious Disease and Pharmacology 1430:The longer half-life is called the 3480:Minimum bactericidal concentration 2583:Clinical study design and analysis 2512:10.1016/B978-0-323-54391-0.00011-4 2038:. Genentech USA, Inc. October 2017 1685:Compendium of Chemical Terminology 1592:10.1016/b978-0-12-815849-4.00001-3 1553:10.1016/b978-0-12-079035-7.50015-4 1520:. 19 February 2020. Archived from 1510:"Definition of Half-Life (t⁄ 1132:The half-life for this process is 1070:. Such a decay rate arises from a 1052:{\displaystyle C(t)=C(0)e^{-kt}\,} 995:, its time dependence is given by 25: 3470:Minimum inhibitory concentration 2620:10.1111/j.1365-2885.2004.00600.x 1941:Manfredonia, John (March 2005). 1648:10.1111/j.1365-2885.2004.00600.x 1584:Therapeutic Drug Monitoring Data 290:Less than 10 seconds (estimate) 104:{\displaystyle t_{\frac {1}{2}}} 3410:WHO list of essential medicines 2903:Non-specific effect of vaccines 2481:. Academic Press. p. 205. 2353:British Journal of Pharmacology 650:Pharmacokinetics § Metrics 534:where it can do the most harm. 270:Common prescription medications 59:) to decrease from its maximum 3465:Antimicrobial pharmacodynamics 2416:10.1016/j.psyneuen.2012.02.014 1547:. Elsevier. pp. 127–144. 1029: 1023: 1014: 1008: 962: 956: 442:Active lipophilic metabolite ( 1: 3390:Functional analog (chemistry) 2067:10.1016/s1871-5125(10)35003-5 541:in the body has a biological 2943:Hill equation (biochemistry) 2649:Younggil Kwon (8 May 2007). 2188:. Janssen Products, Dec 2012 1709:Lin VW; Cardenas DD (2003). 1481:Pharmacology in one semester 498:The biological half-life of 2553:10.1007/978-1-4614-8948-1_1 2449:Neuro Endocrinology Letters 1629:"Plasma terminal half-life" 1586:. Elsevier. pp. 1–17. 1272:Half-life is determined by 372:in rare cases up to 8 days 3536: 3458:Antimicrobial pharmacology 2938:Dose–response relationship 2868:Desensitization (medicine) 647: 641: 359:8–15 hours (higher doses) 357:3–10 hours (lower doses), 3380:Coinduction (anesthetics) 2265:Frontiers in Neuroscience 2167:Haberfeld H, ed. (2020). 2127:Haberfeld H, ed. (2020). 2117:. Accessed 15 April 2021. 2022:. Accessed 15 April 2021. 2002:Haberfeld H, ed. (2020). 1992:. Accessed 15 April 2021. 1913:. Accessed 15 April 2021. 1895:. Accessed 15 April 2021. 1880:. Accessed 15 April 2021. 1801:Haberfeld H, ed. (2020). 1786:Haberfeld H, ed. (2020). 1736:Nordberg, Gunnar (2007). 49:pharmacological half-life 3445:Multiple drug resistance 3418:Tolerance and resistance 2786:Physiological antagonist 2403:Psychoneuroendocrinology 2278:10.3389/fnins.2015.00335 1953:(3 supplement): S18-21. 668:Percent of initial value 634:than peripheral levels. 3515:Mathematics in medicine 3196:Neuropsychopharmacology 2958:Cheng-Prussoff Equation 2953:Del Castillo Katz model 2880:Other effects of ligand 2863:Receptor (biochemistry) 2781:Irreversible antagonist 2213:Medical Science Monitor 1698:10.1351/goldbook.B00658 1477:"Elimination Half-Life" 655:First-order elimination 545:of about 30 to 50 days. 3332:Classical pharmacology 3093:Plasma protein binding 3068:Volume of distribution 2776:Competitive antagonist 1928:reference.medscape.com 1357: 1278:volume of distribution 1253: 1186: 1123: 1068:reaction rate constant 1053: 989: 969: 619:central nervous system 105: 37: 18:Elimination half-lives 3520:Temporal exponentials 3440:Antibiotic resistance 3232:Clinical pharmacology 2751:Physiological agonist 2711:Ligand (biochemistry) 1665:on 20 February 2020. 1358: 1254: 1187: 1124: 1054: 990: 970: 280:Biological half-life 217:alcohol dehydrogenase 106: 45:elimination half-life 35: 3337:Reverse pharmacology 3247:Pharmacoepidemiology 3088:Biological half-life 2968:Ligand binding assay 2842:Activity at receptor 2736:Irreversible agonist 2506:. pp. 123–139. 2365:10.1038/bjp.2008.132 1856:on 28 September 2007 1712:Spinal Cord Medicine 1690:Biological Half Life 1291: 1202: 1139: 1081: 1072:first-order reaction 1002: 979: 968:{\displaystyle C(t)} 950: 597:Peripheral half-life 344:N-desalkylflurazepam 254:to a person who has 131:(cleansing) through 125:signalling molecules 83: 53:biological substance 41:Biological half-life 3385:Combination therapy 3273:Pharmacoinformatics 3242:Medicinal chemistry 2848:Mechanism of action 1834:10.1385/MO:19:4:261 1524:on 20 February 2020 1458:Effective half-life 1436:dominant half-life. 671:Percent completion 661: 627:blood–brain barrier 615:blood-brain-barrier 385:Active metabolite ( 342:Active metabolite ( 229:zero-order kinetics 3355:Immunopharmacology 3305:Pharmacotoxicology 3206:Psychopharmacology 2998:Intrinsic activity 2898:Pleiotropy (drugs) 2819:Agonist-antagonist 2731:Endogenous agonist 1487:on 22 October 2020 1432:terminal half-life 1415:Biphasic half-life 1353: 1249: 1182: 1119: 1049: 985: 965: 659: 430:3 days (70 hours) 101: 38: 3497: 3496: 3493: 3492: 3453: 3452: 3350:Photopharmacology 3345: 3344: 3318: 3317: 3291: 3290: 3255: 3254: 3218: 3217: 3211:Electrophysiology 3201:Neuropharmacology 3156: 3155: 3106: 3105: 3042: 3041: 3029:Therapeutic index 2981: 2980: 2926: 2925: 2875: 2874: 2804: 2803: 2759: 2758: 2662:978-0-306-46820-9 2562:978-1-4614-8947-4 2547:. pp. 3–47. 2488:978-0-08-091922-5 2076:978-0-12-380884-4 1772:978-0-521-84228-0 1747:978-0-12-369413-3 1601:978-0-12-815849-4 1562:978-0-12-079035-7 1350: 1306: 1246: 1217: 1176: 1154: 1102: 988:{\displaystyle t} 944: 943: 528:chelation therapy 491: 490: 169:plasma stability. 98: 16:(Redirected from 3527: 3510:Pharmacokinetics 3455: 3415: 3395:Polypharmacology 3320: 3293: 3283:Pharmacogenomics 3278:Pharmacogenetics 3257: 3220: 3181: 3108: 3078:Rate of infusion 3053: 3048:Pharmacokinetics 2983: 2928: 2877: 2839: 2834:Pharmacodynamics 2814:Neurotransmitter 2796:Enzyme inhibitor 2761: 2716: 2696: 2689: 2682: 2673: 2667: 2666: 2646: 2640: 2639: 2603: 2597: 2596: 2578: 2567: 2566: 2540: 2534: 2533: 2499: 2493: 2492: 2472: 2466: 2465: 2442: 2436: 2435: 2397: 2391: 2390: 2376: 2344: 2338: 2337: 2315: 2309: 2308: 2298: 2280: 2256: 2247: 2244: 2238: 2235: 2229: 2228: 2219:(10): RA329-36. 2204: 2198: 2197: 2195: 2193: 2187: 2179: 2173: 2172: 2164: 2158: 2157: 2155: 2153: 2147: 2139: 2133: 2132: 2124: 2118: 2116: 2109: 2100: 2099: 2054: 2048: 2047: 2045: 2043: 2037: 2029: 2023: 2021: 2014: 2008: 2007: 1999: 1993: 1991: 1984: 1975: 1974: 1972: 1970: 1961:. 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Archived from 1473: 1405: 1403: 1402: 1399: 1396: 1383: 1381: 1380: 1377: 1374: 1362: 1360: 1359: 1354: 1351: 1349: 1341: 1340: 1339: 1338: 1325: 1313: 1308: 1307: 1299: 1258: 1256: 1255: 1250: 1247: 1245: 1244: 1235: 1224: 1219: 1218: 1210: 1191: 1189: 1188: 1183: 1177: 1172: 1161: 1156: 1155: 1147: 1128: 1126: 1125: 1120: 1103: 1101: 1093: 1085: 1058: 1056: 1055: 1050: 1047: 1046: 994: 992: 991: 986: 974: 972: 971: 966: 933: 931: 930: 927: 924: 906: 904: 903: 900: 897: 879: 877: 876: 873: 870: 852: 850: 849: 846: 843: 825: 823: 822: 819: 816: 798: 796: 795: 792: 789: 771: 769: 768: 765: 762: 744: 742: 741: 738: 735: 717: 715: 714: 711: 708: 691: 689: 688: 685: 682: 662: 389:): 30–200 hours 346:): 47–100 hours 274: 164:pharmacokinetics 152:plasma half-life 135:and through the 133:liver metabolism 110: 108: 107: 102: 100: 99: 91: 21: 3535: 3534: 3530: 3529: 3528: 3526: 3525: 3524: 3500: 3499: 3498: 3489: 3449: 3435:Drug resistance 3413: 3369: 3341: 3314: 3310:Neurotoxicology 3287: 3251: 3214: 3176: 3170: 3152: 3102: 3098:Bioavailability 3083:Onset of action 3038: 2977: 2922: 2871: 2828: 2800: 2791:Inverse agonist 2755: 2741:Partial agonist 2705: 2700: 2670: 2663: 2648: 2647: 2643: 2605: 2604: 2600: 2593: 2580: 2579: 2570: 2563: 2542: 2541: 2537: 2522: 2501: 2500: 2496: 2489: 2474: 2473: 2469: 2444: 2443: 2439: 2399: 2398: 2394: 2346: 2345: 2341: 2330: 2317: 2316: 2312: 2258: 2257: 2250: 2245: 2241: 2236: 2232: 2206: 2205: 2201: 2191: 2189: 2185: 2181: 2180: 2176: 2166: 2165: 2161: 2151: 2149: 2145: 2141: 2140: 2136: 2126: 2125: 2121: 2110: 2103: 2077: 2056: 2055: 2051: 2041: 2039: 2035: 2031: 2030: 2026: 2015: 2011: 2001: 2000: 1996: 1985: 1978: 1968: 1966: 1940: 1939: 1935: 1922: 1921: 1917: 1906: 1899: 1888: 1884: 1873: 1869: 1859: 1857: 1815: 1814: 1810: 1800: 1799: 1795: 1785: 1784: 1780: 1773: 1760: 1759: 1755: 1748: 1735: 1734: 1730: 1723: 1708: 1707: 1703: 1678: 1674: 1662: 1631: 1626: 1625: 1621: 1602: 1581: 1580: 1573: 1563: 1542: 1541: 1537: 1527: 1525: 1513: 1508: 1507: 1500: 1490: 1488: 1475: 1474: 1470: 1466: 1448: 1417: 1406: 1400: 1397: 1394: 1393: 1391: 1389:, elimination t 1384: 1378: 1375: 1372: 1371: 1369: 1342: 1330: 1314: 1294: 1289: 1288: 1283: 1267: 1236: 1225: 1205: 1200: 1199: 1162: 1142: 1137: 1136: 1094: 1086: 1079: 1078: 1032: 1000: 999: 977: 976: 948: 947: 928: 925: 922: 921: 919: 901: 898: 895: 894: 892: 874: 871: 868: 867: 865: 847: 844: 841: 840: 838: 820: 817: 814: 813: 811: 793: 790: 787: 786: 784: 766: 763: 760: 759: 757: 739: 736: 733: 732: 730: 712: 709: 706: 705: 703: 686: 683: 680: 679: 677: 657: 652: 646: 640: 599: 496: 272: 264:ethylene glycol 237:ethylene glycol 211:The removal of 209: 201:tritiated water 193: 188: 180:protein binding 86: 81: 80: 73: 68: 28: 23: 22: 15: 12: 11: 5: 3533: 3531: 3523: 3522: 3517: 3512: 3502: 3501: 3495: 3494: 3491: 3490: 3488: 3487: 3482: 3477: 3475:Bacteriostatic 3472: 3467: 3461: 3459: 3451: 3450: 3448: 3447: 3442: 3437: 3432: 3427: 3425:Drug tolerance 3421: 3419: 3412: 3407: 3405:Lists of drugs 3402: 3397: 3392: 3387: 3382: 3377: 3375: 3371: 3370: 3368: 3367: 3362: 3357: 3352: 3346: 3343: 3342: 3340: 3339: 3334: 3328: 3326: 3324:Drug discovery 3316: 3315: 3313: 3312: 3307: 3301: 3299: 3289: 3288: 3286: 3285: 3280: 3275: 3269: 3267: 3253: 3252: 3250: 3249: 3244: 3239: 3234: 3228: 3226: 3216: 3215: 3213: 3208: 3203: 3198: 3193: 3191: 3178: 3172: 3171: 3169: 3168: 3166:Bioequivalence 3163: 3157: 3154: 3153: 3151: 3150: 3140: 3135: 3130: 3125: 3114: 3112: 3104: 3103: 3101: 3100: 3095: 3090: 3085: 3080: 3075: 3065: 3059: 3057: 3050: 3044: 3043: 3040: 3039: 3037: 3036: 3031: 3026: 3000: 2995: 2989: 2987: 2979: 2978: 2976: 2975: 2960: 2955: 2950: 2945: 2940: 2934: 2932: 2924: 2923: 2921: 2920: 2910: 2908:Adverse effect 2905: 2900: 2895: 2883: 2881: 2873: 2872: 2870: 2865: 2860: 2855: 2853:Mode of action 2850: 2845: 2843: 2836: 2830: 2829: 2827: 2826: 2821: 2816: 2811: 2805: 2802: 2801: 2799: 2798: 2793: 2788: 2783: 2778: 2773: 2767: 2765: 2757: 2756: 2754: 2753: 2748: 2743: 2738: 2733: 2728: 2722: 2720: 2713: 2707: 2706: 2701: 2699: 2698: 2691: 2684: 2676: 2669: 2668: 2661: 2641: 2614:(6): 427–439. 2598: 2591: 2568: 2561: 2535: 2520: 2494: 2487: 2467: 2437: 2392: 2339: 2328: 2310: 2248: 2239: 2230: 2199: 2174: 2159: 2134: 2119: 2101: 2075: 2049: 2024: 2016:Buprenorphine 2009: 1994: 1976: 1965:on 20 May 2007 1933: 1915: 1897: 1882: 1867: 1808: 1793: 1778: 1771: 1753: 1746: 1728: 1721: 1701: 1672: 1642:(6): 427–439. 1619: 1600: 1571: 1561: 1535: 1511: 1498: 1467: 1465: 1462: 1461: 1460: 1455: 1447: 1444: 1428: 1427: 1424: 1416: 1413: 1390: 1368: 1364: 1363: 1348: 1345: 1337: 1333: 1328: 1324: 1321: 1318: 1311: 1305: 1302: 1297: 1281: 1265: 1260: 1259: 1243: 1239: 1234: 1231: 1228: 1222: 1216: 1213: 1208: 1193: 1192: 1180: 1175: 1171: 1168: 1165: 1159: 1153: 1150: 1145: 1130: 1129: 1118: 1115: 1112: 1109: 1106: 1100: 1097: 1092: 1089: 1060: 1059: 1045: 1042: 1039: 1035: 1031: 1028: 1025: 1022: 1019: 1016: 1013: 1010: 1007: 984: 964: 961: 958: 955: 942: 941: 938: 935: 915: 914: 911: 908: 888: 887: 884: 881: 861: 860: 857: 854: 834: 833: 830: 827: 807: 806: 803: 800: 780: 779: 776: 773: 753: 752: 749: 746: 726: 725: 722: 719: 699: 698: 695: 692: 673: 672: 669: 666: 656: 653: 642:Main article: 639: 638:Rate equations 636: 598: 595: 594: 593: 587: 581: 575: 565: 562: 552: 546: 495: 492: 489: 488: 485: 479: 478: 475: 469: 468: 465: 459: 458: 455: 449: 448: 438: 432: 431: 428: 422: 421: 418: 412: 411: 408: 402: 401: 398: 392: 391: 381: 375: 374: 368: 362: 361: 355: 349: 348: 338: 332: 331: 330:1.5–4.5 hours 328: 322: 321: 318: 312: 311: 308: 302: 301: 298: 296:Norepinephrine 292: 291: 288: 282: 281: 278: 271: 268: 208: 205: 192: 189: 187: 184: 173:drug discovery 129:detoxification 97: 94: 89: 71: 70:) to half of C 66: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3532: 3521: 3518: 3516: 3513: 3511: 3508: 3507: 3505: 3486: 3483: 3481: 3478: 3476: 3473: 3471: 3468: 3466: 3463: 3462: 3460: 3456: 3446: 3443: 3441: 3438: 3436: 3433: 3431: 3430:Tachyphylaxis 3428: 3426: 3423: 3422: 3420: 3416: 3411: 3408: 3406: 3403: 3401: 3398: 3396: 3393: 3391: 3388: 3386: 3383: 3381: 3378: 3376: 3372: 3366: 3363: 3361: 3358: 3356: 3353: 3351: 3348: 3347: 3338: 3335: 3333: 3330: 3329: 3327: 3325: 3321: 3311: 3308: 3306: 3303: 3302: 3300: 3298: 3294: 3284: 3281: 3279: 3276: 3274: 3271: 3270: 3268: 3266: 3262: 3258: 3248: 3245: 3243: 3240: 3238: 3235: 3233: 3230: 3229: 3227: 3225: 3221: 3212: 3209: 3207: 3204: 3202: 3199: 3197: 3194: 3192: 3190: 3186: 3182: 3179: 3173: 3167: 3164: 3162: 3159: 3158: 3148: 3144: 3141: 3139: 3136: 3134: 3131: 3129: 3126: 3123: 3119: 3116: 3115: 3113: 3109: 3099: 3096: 3094: 3091: 3089: 3086: 3084: 3081: 3079: 3076: 3073: 3069: 3066: 3064: 3061: 3060: 3058: 3054: 3051: 3049: 3045: 3035: 3032: 3030: 3027: 3024: 3020: 3016: 3012: 3008: 3004: 3001: 2999: 2996: 2994: 2991: 2990: 2988: 2984: 2973: 2969: 2965: 2961: 2959: 2956: 2954: 2951: 2949: 2946: 2944: 2941: 2939: 2936: 2935: 2933: 2929: 2918: 2917:Neurotoxicity 2914: 2911: 2909: 2906: 2904: 2901: 2899: 2896: 2893: 2889: 2886:Selectivity ( 2885: 2884: 2882: 2878: 2869: 2866: 2864: 2861: 2859: 2856: 2854: 2851: 2849: 2846: 2844: 2840: 2837: 2835: 2831: 2825: 2824:Pharmacophore 2822: 2820: 2817: 2815: 2812: 2810: 2807: 2806: 2797: 2794: 2792: 2789: 2787: 2784: 2782: 2779: 2777: 2774: 2772: 2769: 2768: 2766: 2762: 2752: 2749: 2747: 2744: 2742: 2739: 2737: 2734: 2732: 2729: 2727: 2724: 2723: 2721: 2717: 2714: 2712: 2708: 2704: 2697: 2692: 2690: 2685: 2683: 2678: 2677: 2674: 2664: 2658: 2654: 2653: 2645: 2642: 2637: 2633: 2629: 2625: 2621: 2617: 2613: 2609: 2602: 2599: 2594: 2592:9780971176744 2588: 2584: 2577: 2575: 2573: 2569: 2564: 2558: 2554: 2550: 2546: 2539: 2536: 2531: 2527: 2523: 2521:9780323543910 2517: 2513: 2509: 2505: 2498: 2495: 2490: 2484: 2480: 2479: 2471: 2468: 2463: 2459: 2455: 2451: 2450: 2441: 2438: 2433: 2429: 2425: 2421: 2417: 2413: 2410:(9): 1582–6. 2409: 2405: 2404: 2396: 2393: 2389: 2384: 2380: 2375: 2370: 2366: 2362: 2359:(2): 358–68. 2358: 2354: 2350: 2343: 2340: 2336: 2331: 2329:9780071481274 2325: 2321: 2314: 2311: 2306: 2302: 2297: 2292: 2288: 2284: 2279: 2274: 2270: 2266: 2262: 2255: 2253: 2249: 2243: 2240: 2234: 2231: 2226: 2222: 2218: 2214: 2210: 2203: 2200: 2184: 2178: 2175: 2170: 2169:Austria-Codex 2163: 2160: 2144: 2138: 2135: 2130: 2129:Austria-Codex 2123: 2120: 2115: 2108: 2106: 2102: 2098: 2094: 2090: 2086: 2082: 2078: 2072: 2068: 2064: 2060: 2053: 2050: 2034: 2028: 2025: 2020: 2013: 2010: 2005: 2004:Austria-Codex 1998: 1995: 1990: 1983: 1981: 1977: 1964: 1960: 1956: 1952: 1948: 1944: 1937: 1934: 1929: 1925: 1919: 1916: 1911: 1904: 1902: 1898: 1893: 1886: 1883: 1878: 1871: 1868: 1855: 1851: 1847: 1843: 1839: 1835: 1831: 1827: 1823: 1819: 1812: 1809: 1804: 1803:Austria-Codex 1797: 1794: 1789: 1788:Austria-Codex 1782: 1779: 1774: 1768: 1764: 1757: 1754: 1749: 1743: 1739: 1732: 1729: 1724: 1722:1-888799-61-7 1718: 1714: 1713: 1705: 1702: 1699: 1695: 1691: 1687: 1686: 1681: 1676: 1673: 1669: 1661: 1657: 1653: 1649: 1645: 1641: 1637: 1630: 1623: 1620: 1616: 1611: 1607: 1603: 1597: 1593: 1589: 1585: 1578: 1576: 1572: 1568: 1564: 1558: 1554: 1550: 1546: 1539: 1536: 1523: 1519: 1515: 1505: 1503: 1499: 1486: 1482: 1478: 1472: 1469: 1463: 1459: 1456: 1453: 1450: 1449: 1445: 1443: 1441: 1437: 1433: 1425: 1422: 1421: 1420: 1414: 1412: 1410: 1388: 1346: 1343: 1335: 1331: 1326: 1322: 1319: 1316: 1309: 1303: 1300: 1295: 1287: 1286: 1285: 1279: 1275: 1270: 1268: 1241: 1237: 1232: 1229: 1226: 1220: 1214: 1211: 1206: 1198: 1197: 1196: 1178: 1173: 1169: 1166: 1163: 1157: 1151: 1148: 1143: 1135: 1134: 1133: 1116: 1113: 1110: 1107: 1104: 1098: 1095: 1090: 1087: 1077: 1076: 1075: 1073: 1069: 1065: 1043: 1040: 1037: 1033: 1026: 1020: 1017: 1011: 1005: 998: 997: 996: 982: 959: 953: 939: 936: 917: 916: 912: 909: 890: 889: 885: 882: 863: 862: 858: 855: 836: 835: 831: 828: 809: 808: 804: 801: 782: 781: 777: 774: 755: 754: 750: 747: 728: 727: 723: 720: 701: 700: 696: 693: 675: 674: 670: 667: 664: 663: 654: 651: 645: 644:Rate equation 637: 635: 632: 629:and exhibits 628: 624: 620: 616: 612: 611:intravenously 608: 604: 596: 591: 588: 585: 582: 579: 576: 573: 569: 566: 563: 560: 559:methylmercury 556: 553: 550: 547: 544: 540: 537: 536: 535: 533: 529: 525: 521: 515: 513: 509: 508:ion exchanger 505: 504:prussian blue 501: 493: 486: 484: 481: 480: 476: 474: 471: 470: 466: 464: 461: 460: 456: 454: 451: 450: 447: 446:): 4–16 days 445: 444:norfluoxetine 439: 437: 434: 433: 429: 427: 424: 423: 419: 417: 414: 413: 409: 407: 406:Buprenorphine 404: 403: 399: 397: 394: 393: 390: 388: 382: 380: 377: 376: 373: 369: 367: 364: 363: 360: 356: 354: 351: 350: 347: 345: 339: 337: 334: 333: 329: 327: 324: 323: 319: 317: 314: 313: 309: 307: 304: 303: 299: 297: 294: 293: 289: 287: 284: 283: 279: 276: 275: 269: 267: 265: 261: 257: 253: 249: 245: 242: 238: 234: 230: 226: 222: 218: 214: 206: 204: 202: 198: 190: 185: 183: 181: 176: 174: 170: 165: 161: 157: 153: 149: 144: 142: 138: 134: 130: 126: 122: 118: 113: 111: 95: 92: 87: 77: 69: 62: 61:concentration 58: 54: 50: 46: 42: 34: 30: 19: 3400:Chemotherapy 3360:Cell biology 3261:Biochemistry 3185:Neuroscience 3133:Distribution 3087: 3063:Loading dose 2746:Superagonist 2703:Pharmacology 2651: 2644: 2611: 2607: 2601: 2582: 2544: 2538: 2503: 2497: 2477: 2470: 2453: 2447: 2440: 2407: 2401: 2395: 2386: 2356: 2352: 2342: 2333: 2319: 2313: 2268: 2264: 2242: 2233: 2216: 2212: 2202: 2190:. Retrieved 2177: 2168: 2162: 2150:. Retrieved 2137: 2128: 2122: 2096: 2058: 2052: 2040:. Retrieved 2027: 2012: 2003: 1997: 1967:. Retrieved 1963:the original 1950: 1946: 1936: 1927: 1918: 1885: 1870: 1858:. Retrieved 1854:the original 1828:(4): 261–5. 1825: 1821: 1811: 1802: 1796: 1787: 1781: 1762: 1756: 1737: 1731: 1711: 1704: 1683: 1675: 1666: 1660:the original 1639: 1635: 1622: 1613: 1583: 1566: 1544: 1538: 1526:. Retrieved 1522:the original 1517: 1489:. Retrieved 1485:the original 1480: 1471: 1435: 1431: 1429: 1418: 1409:loading dose 1365: 1271: 1263: 1261: 1194: 1131: 1063: 1061: 945: 631:psychoactive 623:intranasally 600: 516: 497: 457:14–107 days 441: 420:30–40 hours 410:28–35 hours 400:20–60 hours 384: 383:20–50 hours 371: 370:15–72 hours 358: 353:Methotrexate 341: 244:formaldehyde 210: 194: 177: 168: 160:pharmacology 151: 148:blood plasma 145: 114: 79: 76:blood plasma 48: 44: 40: 39: 29: 3485:Bactericide 3161:Compartment 2972:Patch clamp 2948:Schild plot 2456:(1): 21–5. 2192:24 February 2152:24 February 2111:Fluoxetine 1907:Flurazepam 1615:half-lives. 1528:20 February 1491:20 February 940:~99.90234% 483:Bedaquiline 473:Dutasteride 310:14 minutes 306:Oxaliplatin 248:formic acid 227:may follow 141:exponential 117:metabolites 55:(such as a 3504:Categories 3365:Physiology 3297:Toxicology 3189:psychology 3138:Metabolism 3128:Absorption 3122:Liberation 2964:Organ bath 2892:Functional 2771:Antagonist 2764:Inhibitory 2719:Excitatory 2042:20 January 1969:29 January 1464:References 1387:amiodarone 913:99.21875% 648:See also: 463:Vandetanib 453:Amiodarone 436:Fluoxetine 416:Clonazepam 387:nordazepam 340:2.3 hours 336:Flurazepam 300:2 minutes 57:medication 3147:Clearance 3143:Excretion 2962:Methods ( 2628:0140-7783 2287:1662-453X 2114:Monograph 2085:1871-5125 2019:Monograph 1989:Monograph 1986:Diazepam 1910:Monograph 1892:Monograph 1889:Morphine 1877:Monograph 1874:Zaleplon 1610:209258489 1452:Half-life 1327:⋅ 1320:⁡ 1276:(CL) and 1274:clearance 1238:λ 1230:⁡ 1167:⁡ 1108:− 1038:− 937:~0.09766% 886:98.4375% 607:half-life 590:Plutonium 584:Plutonium 543:half-life 512:potassium 487:165 days 426:Donepezil 396:Phenytoin 366:Methadone 286:Adenosine 277:Substance 260:blindness 137:excretion 3265:genetics 3237:Pharmacy 3224:Medicine 3034:Affinity 2993:Efficacy 2931:Analysis 2913:Toxicity 2636:15601438 2530:57512164 2462:22467107 2432:25253083 2424:22436536 2383:18475254 2305:26441508 2225:16192916 2093:22469221 1959:18154194 1860:28 March 1842:12512920 1656:15601438 1518:AIDSinfo 1446:See also 910:0.78125% 859:96.875% 665:Time (t) 603:oxytocin 539:Polonium 467:19 days 379:Diazepam 326:Morphine 316:Zaleplon 256:ingested 233:methanol 186:Examples 156:organism 3175:Related 3118:(L)ADME 3072:Initial 3056:Metrics 3003:Potency 2986:Metrics 2888:Binding 2858:Binding 2726:Agonist 2374:2442436 2296:4585313 2271:: 335. 1850:1068099 1404:⁠ 1392:⁠ 1382:⁠ 1370:⁠ 1066:is the 932:⁠ 920:⁠ 905:⁠ 893:⁠ 883:1.5625% 878:⁠ 866:⁠ 851:⁠ 839:⁠ 832:95.00% 826:Ă— 4.322 824:⁠ 812:⁠ 805:93.75% 797:⁠ 785:⁠ 778:90.00% 772:Ă— 3.322 770:⁠ 758:⁠ 743:⁠ 731:⁠ 716:⁠ 704:⁠ 690:⁠ 678:⁠ 578:Cadmium 555:Mercury 549:Caesium 500:caesium 320:1 hour 252:ethanol 219:in the 213:ethanol 207:Alcohol 197:alcohol 74:in the 3177:fields 2659:  2634:  2626:  2589:  2559:  2528:  2518:  2485:  2460:  2430:  2422:  2381:  2371:  2335:stake. 2326:  2303:  2293:  2285:  2223:  2091:  2083:  2073:  1957:  1848:  1840:  1769:  1744:  1719:  1654:  1608:  1598:  1559:  1262:where 1062:where 856:3.125% 775:10.00% 751:87.5% 605:has a 514:ions. 494:Metals 123:, and 3374:Other 3111:LADME 2526:S2CID 2428:S2CID 2186:(PDF) 2146:(PDF) 2036:(PDF) 1846:S2CID 1680:IUPAC 1663:(PDF) 1632:(PDF) 1606:S2CID 829:5.00% 802:6.25% 748:12.5% 532:brain 526:in a 241:toxic 225:blood 221:liver 191:Water 121:drugs 3263:and 3187:and 3023:TD50 3019:LD50 3015:ED50 3011:IC50 3007:EC50 2809:Drug 2657:ISBN 2632:PMID 2624:ISSN 2587:ISBN 2557:ISBN 2516:ISBN 2483:ISBN 2458:PMID 2420:PMID 2379:PMID 2324:ISBN 2301:PMID 2283:ISSN 2221:PMID 2194:2020 2154:2020 2089:PMID 2081:ISSN 2071:ISBN 2044:2019 1971:2007 1955:PMID 1862:2007 1838:PMID 1767:ISBN 1742:ISBN 1717:ISBN 1652:PMID 1596:ISBN 1557:ISBN 1530:2020 1493:2020 934:Ă— 10 724:75% 697:50% 572:bone 568:Lead 557:(as 524:EDTA 246:and 235:and 162:and 3120:: ( 2616:doi 2549:doi 2508:doi 2412:doi 2369:PMC 2361:doi 2357:154 2291:PMC 2273:doi 2063:doi 1951:105 1830:doi 1694:doi 1692:". 1644:doi 1588:doi 1549:doi 907:Ă— 7 880:Ă— 6 853:Ă— 5 799:Ă— 4 745:Ă— 3 721:25% 718:Ă— 2 694:50% 570:in 72:max 67:max 3506:: 3021:, 3017:, 3013:, 3009:, 2970:, 2966:, 2890:, 2630:. 2622:. 2612:27 2610:. 2571:^ 2555:. 2524:. 2514:. 2454:33 2452:. 2426:. 2418:. 2408:37 2406:. 2385:. 2377:. 2367:. 2355:. 2351:. 2332:. 2299:. 2289:. 2281:. 2267:. 2263:. 2251:^ 2217:11 2215:. 2211:. 2104:^ 2095:. 2087:. 2079:. 2069:. 1979:^ 1949:. 1945:. 1926:. 1900:^ 1844:. 1836:. 1826:19 1824:. 1820:. 1682:, 1650:. 1640:27 1638:. 1634:. 1612:. 1604:. 1594:. 1574:^ 1565:. 1555:. 1516:. 1514:)" 1501:^ 1479:. 1442:. 1317:ln 1280:(V 1227:ln 1164:ln 175:. 143:. 119:, 112:. 47:, 3149:) 3145:( 3124:) 3074:) 3070:( 3025:) 3005:( 2974:) 2919:) 2915:( 2894:) 2695:e 2688:t 2681:v 2665:. 2638:. 2618:: 2595:. 2565:. 2551:: 2532:. 2510:: 2491:. 2464:. 2434:. 2414:: 2363:: 2307:. 2275:: 2269:9 2227:. 2196:. 2156:. 2065:: 2046:. 1973:. 1930:. 1864:. 1832:: 1775:. 1750:. 1725:. 1696:: 1646:: 1590:: 1551:: 1532:. 1512:2 1495:. 1401:2 1398:/ 1395:1 1379:2 1376:/ 1373:1 1367:t 1347:L 1344:C 1336:D 1332:V 1323:2 1310:= 1304:2 1301:1 1296:t 1282:D 1266:z 1264:λ 1242:z 1233:2 1221:= 1215:2 1212:1 1207:t 1179:. 1174:k 1170:2 1158:= 1152:2 1149:1 1144:t 1117:. 1114:C 1111:k 1105:= 1099:t 1096:d 1091:C 1088:d 1064:k 1044:t 1041:k 1034:e 1030:) 1027:0 1024:( 1021:C 1018:= 1015:) 1012:t 1009:( 1006:C 983:t 963:) 960:t 957:( 954:C 929:2 926:/ 923:1 918:t 902:2 899:/ 896:1 891:t 875:2 872:/ 869:1 864:t 848:2 845:/ 842:1 837:t 821:2 818:/ 815:1 810:t 794:2 791:/ 788:1 783:t 767:2 764:/ 761:1 756:t 740:2 737:/ 734:1 729:t 713:2 710:/ 707:1 702:t 687:2 684:/ 681:1 676:t 518:( 96:2 93:1 88:t 65:C 63:( 43:( 20:)

Index

Elimination half-lives
Graph of drug plasma concentrations over 96 hours
biological substance
medication
concentration
Cmax
blood plasma
metabolites
drugs
signalling molecules
detoxification
liver metabolism
excretion
exponential
blood plasma
organism
pharmacology
pharmacokinetics
drug discovery
protein binding
alcohol
tritiated water
ethanol
alcohol dehydrogenase
liver
blood
zero-order kinetics
methanol
ethylene glycol
toxic

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