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Bioavailability

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virtue of their different isotopic constitution, and can thus be used to determine the oral and intravenous pharmacokinetics from the same dose administration. This technique eliminates pharmacokinetic issues with non-equivalent clearance as well as enabling the intravenous dose to be administered with a minimum of toxicology and formulation. The technique was first applied using stable-isotopes such as C and mass-spectrometry to distinguish the isotopes by mass difference. More recently, C labelled drugs are administered intravenously and accelerator mass spectrometry (AMS) used to measure the isotopically labelled drug along with mass spectrometry for the unlabelled drug.
132:, which covers the intake of nutrients and non-drug dietary ingredients, the concept of bioavailability lacks the well-defined standards associated with the pharmaceutical industry. The pharmacological definition cannot apply to these substances because utilization and absorption is a function of the nutritional status and physiological state of the subject, resulting in even greater differences from individual to individual (inter-individual variation). Therefore, bioavailability for dietary supplements can be defined as the proportion of the administered substance capable of being absorbed and available for use or storage. 620:< 100%). Various physiological factors reduce the availability of drugs prior to their entry into the systemic circulation. Whether a drug is taken with or without food will also affect absorption, other drugs taken concurrently may alter absorption and first-pass metabolism, intestinal motility alters the dissolution of the drug and may affect the degree of chemical degradation of the drug by intestinal microflora. Disease states affecting liver metabolism or gastrointestinal function will also have an effect. 88:. To ensure that the drug taker who has poor absorption is dosed appropriately, the bottom value of the deviation range is employed to represent real bioavailability and to calculate the drug dose needed for the drug taker to achieve systemic concentrations similar to the intravenous formulation. To dose without knowing the drug taker's absorption rate, the bottom value of the deviation range is used in order to ensure the intended efficacy, unless the drug is associated with a narrow 376:; that is, a route of administration that guarantees all of the administered drug reaches systemic circulation. Such studies come at considerable cost, not least of which is the necessity to conduct preclinical toxicity tests to ensure adequate safety, as well as potential problems due to solubility limitations. These limitations may be overcome, however, by administering a very low dose (typically a few micrograms) of an 166: 156:
and precipitation with calcium phosphates at high soil pH. Toxic materials in soil, such as lead from paint may be rendered unavailable to animals ingesting contaminated soil by supplying phosphorus fertilizers in excess. Organic pollutants such as solvents or pesticides may be rendered unavailable
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Bioavailability is the measure by which various substances in the environment may enter into living organisms. It is commonly a limiting factor in the production of crops (due to solubility limitation or absorption of plant nutrients to soil colloids) and in the removal of toxic substances from the
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There is no regulatory requirement to define the intravenous pharmacokinetics or absolute bioavailability however regulatory authorities do sometimes ask for absolute bioavailability information of the extravascular route in cases in which the bioavailability is apparently low or variable and there
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administration), with the bioavailability of the same drug following intravenous administration. It is the fraction of exposure to a drug (AUC) through non-intravenous administration compared with the corresponding intravenous administration of the same drug. The comparison must be dose normalized
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concomitantly with a therapeutic non-isotopically labelled oral dose (the isotopically labelled intravenous dose is sufficiently low so as not to perturb the systemic drug concentrations achieved from the non-labelled oral dose). The intravenous and oral concentrations can then be deconvoluted by
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While the mechanisms by which a formulation affects bioavailability and bioequivalence have been extensively studied in drugs, formulation factors that influence bioavailability and bioequivalence in nutritional supplements are largely unknown. As a result, in nutritional sciences, relative
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food chain by microorganisms (due to sorption to or partitioning of otherwise degradable substances into inaccessible phases in the environment). A noteworthy example for agriculture is plant phosphorus deficiency induced by precipitation with iron and aluminum phosphates at low
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Although knowing the true extent of systemic absorption (referred to as absolute bioavailability) is clearly useful, in practice it is not determined as frequently as one may think. The reason for this is that its assessment requires an
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Schuppan, D.; Molz, K. H.; Staib, A. H.; Rietbrock, N. (1981). "Bioavailability of theophylline from a sustained-release aminophylline formulation (Euphyllin retard tablets) – plasma levels after single and multiple oral doses".
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Bioavailability is the major factor affecting dietary requirements (Sandstrom, 1997). Flesh foods facilitate bioavailability, although indigestible Zn-binding ligands decrease bioavailability (Mills, 1985).
430: 863: 99:, herbs and other nutrients in which the route of administration is nearly always oral, bioavailability generally designates simply the quantity or fraction of the ingested dose that is absorbed. 1090:
SANDSTEAD, HAROLD H.; AU, WILLIAM (2007). "Zinc**Dr. Carl-Gustaf Elinder was the author of this chapter in the 2nd edition of the Handbook on Toxicology of Metals; his text provided guidance.".
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O'Loughlin, Edward J.; Traina, Samuel J.; Sims, Gerald K. (2000). "Effects of sorption on the biodegradation of 2-methylpyridine in aqueous suspensions of reference clay minerals".
69:(AUC) for the extravascular formulation to the AUC for the intravascular formulation. AUC is used because AUC is proportional to the dose that has entered the systemic circulation. 208:
plot for the drug after both intravenous (iv) and extravascular (non-intravenous, i.e., oral) administration. The absolute bioavailability is the dose-corrected area under curve (
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bioavailability or bioequivalence is the most common measure of bioavailability, comparing the bioavailability of one formulation of the same dietary ingredient to another.
1919: 197:(e.g., account for different doses or varying weights of the subjects); consequently, the amount absorbed is corrected by dividing the corresponding dose administered. 368:
than one. If we compare the two different dosage forms having same active ingredients and compare the two drug bioavailability is called comparative bioavailability.
788:, inter-individual variation is a critical measurement used to assess the bioavailability differences from patient to patient in order to ensure predictable dosing. 112:
Bioavailability is a term used to describe the percentage of an administered dose of a xenobiotic that reaches the systemic circulation. It is denoted by the letter
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Each of these factors may vary from patient to patient (inter-individual variation), and indeed in the same patient over time (intra-individual variation). In
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and the pharmacokinetics at therapeutic doses. In all such cases, to conduct an absolute bioavailability study requires that the drug be given intravenously.
1234:"Bioavailability of Nutrients: A Practical Approach to In Vitro Demonstration of the Availability of Nutrients in Multivitamin-Mineral Combination Products" 1528:
Lappin, Graham; Rowland, Malcolm; Garner, R. Colin (2006). "The use of isotopes in the determination of absolute bioavailability of drugs in humans".
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Sims, G.K.; Radosevich, M.; He, X.-T.; Traina, S. J. (1991). "The effects of sorption on the bioavailability of pesticides". In Betts, W. B. (ed.).
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Hinsinger, Philippe (2001). "Bioavailability of soil inorganic P in the rhizosphere as affected by root-induced chemical changes: a review".
1175: 1143: 1107: 1033: 1000: 960: 927: 902: 350:{\displaystyle F_{\mathrm {abs} }=100\cdot {\frac {AUC_{\mathrm {po} }\cdot D_{\mathrm {iv} }}{AUC_{\mathrm {iv} }\cdot D_{\mathrm {po} }}}} 169:
Absolute bioavailability is a ratio of areas under the curves. IV, intravenous; PO, oral route. C is plasma concentration (arbitrary units).
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to microorganisms and thus persist in the environment when they are adsorbed to soil minerals or partition into hydrophobic organic matter.
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Lappin, Graham; Stevens, Lloyd (2008). "Biomedical accelerator mass spectrometry: Recent applications in metabolism and pharmacokinetics".
538:{\displaystyle F_{\mathrm {rel} }=100\cdot {\frac {AUC_{\mathrm {A} }\cdot D_{\mathrm {B} }}{AUC_{\mathrm {B} }\cdot D_{\mathrm {A} }}}} 66: 2738: 1406: 392:
Intravenous administration of a developmental drug can provide valuable information on the fundamental pharmacokinetic parameters of
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is 111%, since the drug is completely absorbed and first-pass metabolism in the lung after intravenous administration is bypassed.
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Hoag, Stephen W.; Hussain, Ajaz S. (2001). "The Impact of Formulation on Bioavailability: Summary of Workshop Discussion".
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The absolute bioavailability of a drug, when administered by an extravascular route, is usually less than one (i.e.,
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Ma, Qi-Ying; Traina, Samuel J.; Logan, Terry J.; Ryan, James A. (1993). "In situ lead immobilization by apatite".
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Absolute bioavailability compares the bioavailability of the active drug in systemic circulation following non-
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Sims, Gerald K.; Cupples, Alison M. (1999). "Factors controlling degradation of pesticides in soil".
1317: 401: 47: 556:) between two drug products. For FDA approval, a generic manufacturer must demonstrate that the 90% 2643: 2531: 2500: 2146: 2106: 2029: 1894: 1884: 1808: 557: 129: 96: 2613: 2563: 2464: 2277: 2256: 2156: 2077: 1989: 1599: 1553: 1461: 1375: 1290: 89: 81: 61:
other than intravenous, its bioavailability is lower due to intestinal epithelium absorption and
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Age: In general, drugs are metabolized more slowly in fetal, neonatal, and geriatric populations
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Therefore, a drug given by the intravenous route will have an absolute bioavailability of 100% (
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Bioavailability strictly refers to both the uptake and metabolic utilization of a nutrient.
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Hebert, Mary F. (2013). "Impact of Pregnancy on Maternal Pharmacokinetics of Medications".
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In pharmacology, relative bioavailability measures the bioavailability (estimated as the
1321: 2683: 2663: 2582: 2424: 2166: 2111: 1889: 1854: 1505: 1480: 1099: 1025: 992: 894: 785: 701: 549: 364:= 1), whereas drugs given by other routes usually have an absolute bioavailability of 2762: 2688: 2175: 2082: 1914: 1839: 1829: 1465: 1135: 952: 1707:. Drugs and the Pharmaceutical Sciences. Vol. 48. New York, NY: Marcel Dekker. 1603: 1379: 17: 2658: 2618: 2519: 2443: 2321: 2004: 1961: 1909: 1557: 1294: 1193:"Factors Influencing the Measurement of Bioavailability, Taking Calcium as a Model" 1051:"Factors Influencing the Measurement of Bioavailability, Taking Calcium as a Model" 854: 836: 136: 31: 1481:"Bioavailability and bioequivalence in drug development: BABE in drug development" 1731: 642:
The drug formulation (immediate release, excipients used, manufacturing methods,
2743: 2230: 2206: 1844: 1776: 1723: 185: 174: 54: 1736:. Statistics in Practice. Chichester, UK: John Wiley and Sons. pp. 17–36. 2623: 2555: 2447: 2222: 1834: 1587: 1422:"Defining and unpacking the core concepts of pharmacology A global initiative" 1286: 636: 628: 193: 57:, its bioavailability is 100%. However, when a medication is administered via 43: 1630: 1541: 1250: 1233: 1209: 1192: 1067: 1050: 200:
In pharmacology, in order to determine absolute bioavailability of a drug, a
65:. Thereby, mathematically, bioavailability equals the ratio of comparing the 2401: 755: 720: 659: 1638: 1595: 1549: 1514: 1457: 1371: 1259: 1218: 1076: 1666: 2523: 2495: 2482: 2251: 2171: 1686:
Clinical Pharmacokinetics and Pharmacodynamics: Concepts and Applications
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10.1002/(SICI)1096-9063(199905)55:5<598::AID-PS962>3.0.CO;2-N
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International Journal of Clinical Pharmacology, Therapy, and Toxicology
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intravenous. The formula for calculating the absolute bioavailability,
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and nutrition sciences, bioavailability is measured by calculating the
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Bioequivalence Studies in Drug Development: Methods and Applications
853: Reference listed drug products (i.e., innovator's) as well as 165: 1688:(4 ed.). Philadelphia, PA: Lippincott Williams & Wilkins. 590:
refers to the maximum concentration of the drug in the blood. When
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Welling, Peter G.; Tse, Francis L. S.; Dighe, Shrikant V. (1991).
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Design and Analysis of Bioavailability and Bioequivalence Studies
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refers to the concentration of the drug in the blood over time
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Relative bioavailability is one of the measures used to assess
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is given, it refers to the time it takes for a drug to reach
220:, of a drug administered orally (po) is given below (where 67:
area under the plasma drug concentration curve versus time
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Wiley Interdisciplinary Reviews: Computational Statistics
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Davis, Jennifer L. (2018). "Pharmacologic Principles".
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Enzyme induction (increased rate of metabolism), e.g.,
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Flynn, Edward (2007). "Pharmacokinetic Parameters".
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Whether the formulation is administered in a fed or
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"Modeling of Disposition". 945:xPharm: The Comprehensive Pharmacology Reference 560:for the ratio of the mean responses (usually of 1166:Applied Biopharmaceutics & Pharmacokinetics 749:Individual variation in metabolic differences 143:(AUC) of the drug concentration time profile. 1946: 1792: 857:products that have been approved based on an 421: 8: 1920:Quantitative structure–activity relationship 1128:Encyclopedia of Food Sciences and Nutrition 716:induction/inhibition by other drugs/foods: 412:Relative bioavailability and bioequivalence 42:and is the fraction (%) of an administered 2713: 2673: 2578: 2551: 2515: 2478: 2439: 2366: 2311: 2241: 2186: 2135: 2097: 2019: 1974: 1953: 1939: 1931: 1799: 1785: 1777: 1504: 1447: 1437: 1249: 1208: 1066: 525: 524: 510: 509: 490: 489: 475: 474: 461: 439: 438: 432: 334: 333: 316: 315: 293: 292: 275: 274: 261: 239: 238: 232: 1170:(4th ed.). New York: McGraw-Hill. 920:The Textbook of Pharmaceutical Medicine 877: 1722:Hauschke, Dieter; Steinijans, Volker; 1360:Environmental Toxicology and Chemistry 1310:Environmental Science & Technology 887:Clinical Pharmacology During Pregnancy 839:. If administered as an oral solution 803:Biopharmaceutics Classification System 1347:. London: Springer. pp. 119–137. 675:Interactions with other foods (e.g., 668:Interactions with other drugs (e.g., 665:Interactions with other drugs/foods: 385:is a proven relationship between the 7: 1684:Rowland, Malcolm; Tozer, N. (2010). 1092:Handbook on the Toxicology of Metals 147:In environmental sciences or science 922:(6th ed.). Jersey: BMJ Books. 612:Factors influencing bioavailability 2739:Minimum bactericidal concentration 1026:10.1016/b978-0-08-046884-6.00108-1 993:10.1016/b978-0-323-44329-6.00002-4 918:Griffin, J. P. (7 December 2009). 895:10.1016/b978-0-12-386007-1.00003-9 526: 511: 491: 476: 446: 443: 440: 338: 335: 320: 317: 297: 294: 279: 276: 246: 243: 240: 25: 627:Physical properties of the drug ( 206:plasma drug concentration vs time 184:, buccal, ocular, nasal, rectal, 116:(or, if expressed in percent, by 2729:Minimum inhibitory concentration 1130:. Elsevier. pp. 6272–6277. 1100:10.1016/b978-012369413-3/50102-6 953:10.1016/b978-008055232-3.60034-0 859:Abbreviated New Drug Application 72:Bioavailability of a drug is an 2669:WHO list of essential medicines 2162:Non-specific effect of vaccines 1479:Chow, Shein-Chung (July 2014). 1426:British Journal of Pharmacology 1162:Shargel, L.; Yu, A. B. (1999). 564:and the maximum concentration, 204:study must be done to obtain a 2724:Antimicrobial pharmacodynamics 1136:10.1016/b0-12-227055-x/01309-2 1094:. Elsevier. pp. 925–947. 1020:. Elsevier. pp. 153–177. 1: 2649:Functional analog (chemistry) 1705:Pharmaceutical Bioequivalence 1232:Srinivasan, V. Srini (2001). 987:. Elsevier. pp. 79–137. 212:) non-intravenous divided by 2202:Hill equation (biochemistry) 889:. Elsevier. pp. 17–39. 696:Transporters: Substrate of 27:Pharmacological measurement 2795: 2717:Antimicrobial pharmacology 2197:Dose–response relationship 2127:Desensitization (medicine) 1191:Heaney, Robert P. (2001). 1049:Heaney, Robert P. (2001). 947:. Elsevier. pp. 1–3. 378:isotopically labelled drug 2639:Coinduction (anesthetics) 1815: 1588:10.1517/17425255.4.8.1021 760:enterohepatic circulation 2704:Multiple drug resistance 2677:Tolerance and resistance 2045:Physiological antagonist 1619:The Journal of Nutrition 1542:10.1517/17425255.2.3.419 1420:Guilding, Clare (2023). 1238:The Journal of Nutrition 1197:The Journal of Nutrition 1055:The Journal of Nutrition 1018:Comprehensive Toxicology 985:Equine Internal Medicine 161:Absolute bioavailability 2769:Pharmacokinetic metrics 2455:Neuropsychopharmacology 2217:Cheng-Prussoff Equation 2212:Del Castillo Katz model 2139:Other effects of ligand 2122:Receptor (biochemistry) 2040:Irreversible antagonist 1875:Lipinski's rule of five 1625:(4 Suppl): 1389–1391S. 1287:10.1023/A:1013351617532 1244:(4 Suppl): 1349–1350S. 1203:(4 Suppl): 1344–1348S. 224:is dose administered). 2779:Life sciences industry 2591:Classical pharmacology 2352:Plasma protein binding 2327:Volume of distribution 2035:Competitive antagonist 1631:10.1093/jn/131.4.1389S 1372:10.1002/etc.5620190904 1251:10.1093/jn/131.4.1349S 1210:10.1093/jn/131.4.1344S 1068:10.1093/jn/131.4.1344S 756:Phenotypic differences 709:gastrointestinal tract 539: 394:volume of distribution 351: 170: 124:In nutritional science 78:population variability 2699:Antibiotic resistance 2491:Clinical pharmacology 2010:Physiological agonist 1970:Ligand (biochemistry) 1880:Lipophilic efficiency 656:Gastric emptying rate 540: 374:intravenous reference 352: 168: 63:first-pass metabolism 2596:Reverse pharmacology 2506:Pharmacoepidemiology 2347:Biological half-life 2227:Ligand binding assay 2101:Activity at receptor 1995:Irreversible agonist 813:Lipinski's Rule of 5 774:insufficiency, poor 672:, alcohol, nicotine) 431: 231: 48:systemic circulation 38:is a subcategory of 18:Oral bioavailability 2774:Medicinal chemistry 2644:Combination therapy 2532:Pharmacoinformatics 2501:Medicinal chemistry 2107:Mechanism of action 1895:New chemical entity 1885:Mechanism of action 1809:medicinal chemistry 1330:10.1021/es00046a007 1322:1993EnST...27.1803M 861:are given in FDA's 700:transporters (e.g. 558:confidence interval 130:nutritional science 97:dietary supplements 2614:Immunopharmacology 2564:Pharmacotoxicology 2465:Psychopharmacology 2257:Intrinsic activity 2157:Pleiotropy (drugs) 2078:Agonist-antagonist 1990:Endogenous agonist 535: 347: 171: 90:therapeutic window 2756: 2755: 2752: 2751: 2712: 2711: 2609:Photopharmacology 2604: 2603: 2577: 2576: 2550: 2549: 2514: 2513: 2477: 2476: 2470:Electrophysiology 2460:Neuropharmacology 2415: 2414: 2365: 2364: 2301: 2300: 2288:Therapeutic index 2240: 2239: 2185: 2184: 2134: 2133: 2063: 2062: 2018: 2017: 1928: 1927: 1870:Ligand efficiency 1769:978-1-58488-668-6 1743:978-0-470-09475-4 1714:978-0-8247-8484-3 1695:978-0-7817-5009-7 1497:10.1002/wics.1310 1439:10.1111/bph.16222 1395:Pesticide Science 1177:978-0-8385-0278-5 1145:978-0-12-227055-0 1109:978-0-12-369413-3 1035:978-0-08-046884-6 1002:978-0-323-44329-6 962:978-0-08-055232-3 929:978-1-4051-8035-1 904:978-0-12-386007-1 742:Enzyme inhibition 533: 345: 46:that reaches the 16:(Redirected from 2786: 2714: 2674: 2654:Polypharmacology 2579: 2552: 2542:Pharmacogenomics 2537:Pharmacogenetics 2516: 2479: 2440: 2367: 2337:Rate of infusion 2312: 2307:Pharmacokinetics 2242: 2187: 2136: 2098: 2093:Pharmacodynamics 2073:Neurotransmitter 2055:Enzyme inhibitor 2020: 1975: 1955: 1948: 1941: 1932: 1905:Pharmacokinetics 1900:Pharmacodynamics 1865:Enzyme inhibitor 1850:Drug development 1801: 1794: 1787: 1778: 1773: 1754: 1752: 1750: 1718: 1699: 1671: 1670: 1649: 1643: 1642: 1614: 1608: 1607: 1582:(8): 1021–1033. 1571: 1562: 1561: 1525: 1519: 1518: 1508: 1476: 1470: 1469: 1451: 1441: 1417: 1411: 1410: 1390: 1384: 1383: 1366:(9): 2168–2174. 1355: 1349: 1348: 1340: 1334: 1333: 1316:(9): 1803–1810. 1305: 1299: 1298: 1270: 1264: 1263: 1253: 1229: 1223: 1222: 1212: 1188: 1182: 1181: 1169: 1159: 1153: 1152: 1123: 1117: 1116: 1087: 1081: 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1392: 1391: 1387: 1357: 1356: 1352: 1342: 1341: 1337: 1307: 1306: 1302: 1272: 1271: 1267: 1231: 1230: 1226: 1190: 1189: 1185: 1178: 1161: 1160: 1156: 1146: 1125: 1124: 1120: 1110: 1089: 1088: 1084: 1061:(4): 1344S–8S. 1048: 1047: 1043: 1036: 1015: 1014: 1010: 1003: 982: 981: 970: 963: 942: 941: 937: 930: 917: 916: 912: 905: 884: 883: 879: 874: 868: 845: 844: 823: 821: 794: 786:clinical trials 685:cranberry juice 614: 603: 596: 589: 570: 520: 505: 498: 485: 470: 463: 434: 429: 428: 414: 329: 311: 304: 288: 270: 263: 234: 229: 228: 202:pharmacokinetic 163: 149: 126: 110: 108:In pharmacology 105: 82:deviation range 36:bioavailability 28: 23: 22: 15: 12: 11: 5: 2792: 2790: 2782: 2781: 2776: 2771: 2761: 2760: 2754: 2753: 2750: 2749: 2747: 2746: 2741: 2736: 2734:Bacteriostatic 2731: 2726: 2720: 2718: 2710: 2709: 2707: 2706: 2701: 2696: 2691: 2686: 2684:Drug tolerance 2680: 2678: 2671: 2666: 2664:Lists of drugs 2661: 2656: 2651: 2646: 2641: 2636: 2634: 2630: 2629: 2627: 2626: 2621: 2616: 2611: 2605: 2602: 2601: 2599: 2598: 2593: 2587: 2585: 2583:Drug discovery 2575: 2574: 2572: 2571: 2566: 2560: 2558: 2548: 2547: 2545: 2544: 2539: 2534: 2528: 2526: 2512: 2511: 2509: 2508: 2503: 2498: 2493: 2487: 2485: 2475: 2474: 2472: 2467: 2462: 2457: 2452: 2450: 2437: 2431: 2430: 2428: 2427: 2425:Bioequivalence 2422: 2416: 2413: 2412: 2410: 2409: 2399: 2394: 2389: 2384: 2373: 2371: 2363: 2362: 2360: 2359: 2354: 2349: 2344: 2339: 2334: 2324: 2318: 2316: 2309: 2303: 2302: 2299: 2298: 2296: 2295: 2290: 2285: 2259: 2254: 2248: 2246: 2238: 2237: 2235: 2234: 2219: 2214: 2209: 2204: 2199: 2193: 2191: 2183: 2182: 2180: 2179: 2169: 2167:Adverse effect 2164: 2159: 2154: 2142: 2140: 2132: 2131: 2129: 2124: 2119: 2114: 2112:Mode of action 2109: 2104: 2102: 2095: 2089: 2088: 2086: 2085: 2080: 2075: 2070: 2064: 2061: 2060: 2058: 2057: 2052: 2047: 2042: 2037: 2032: 2026: 2024: 2016: 2015: 2013: 2012: 2007: 2002: 1997: 1992: 1987: 1981: 1979: 1972: 1966: 1965: 1960: 1958: 1957: 1950: 1943: 1935: 1926: 1925: 1923: 1922: 1917: 1912: 1907: 1902: 1897: 1892: 1890:Mode of action 1887: 1882: 1877: 1872: 1867: 1862: 1860:Drug targeting 1857: 1855:Drug discovery 1852: 1847: 1842: 1837: 1832: 1827: 1822: 1816: 1813: 1812: 1806: 1804: 1803: 1796: 1789: 1781: 1775: 1774: 1768: 1755: 1742: 1719: 1713: 1700: 1694: 1679: 1676: 1673: 1672: 1661:(5): 223–227. 1644: 1609: 1563: 1536:(3): 419–427. 1520: 1491:(4): 304–312. 1471: 1432:(9): 375–392. 1412: 1401:(5): 598–601. 1385: 1350: 1335: 1300: 1281:(2): 173–195. 1275:Plant and Soil 1265: 1224: 1183: 1176: 1154: 1144: 1118: 1108: 1082: 1041: 1034: 1008: 1001: 968: 961: 935: 928: 910: 903: 876: 875: 873: 870: 820: 817: 816: 815: 810: 805: 800: 793: 790: 782: 781: 780: 779: 767:Disease state 765: 764: 763: 762:, diet, gender 753: 747: 746: 745: 739: 711: 707:Health of the 705: 702:P-glycoprotein 694: 693: 692: 673: 663: 657: 654: 647: 640: 629:hydrophobicity 613: 610: 601: 594: 587: 568: 550:bioequivalence 546: 545: 528: 523: 519: 513: 508: 504: 501: 493: 488: 484: 478: 473: 469: 466: 460: 457: 454: 448: 445: 442: 437: 413: 410: 358: 357: 340: 337: 332: 328: 322: 319: 314: 310: 307: 299: 296: 291: 287: 281: 278: 273: 269: 266: 260: 257: 254: 248: 245: 242: 237: 178:administration 162: 159: 148: 145: 125: 122: 109: 106: 104: 101: 80:into account, 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2791: 2780: 2777: 2775: 2772: 2770: 2767: 2766: 2764: 2745: 2742: 2740: 2737: 2735: 2732: 2730: 2727: 2725: 2722: 2721: 2719: 2715: 2705: 2702: 2700: 2697: 2695: 2692: 2690: 2689:Tachyphylaxis 2687: 2685: 2682: 2681: 2679: 2675: 2670: 2667: 2665: 2662: 2660: 2657: 2655: 2652: 2650: 2647: 2645: 2642: 2640: 2637: 2635: 2631: 2625: 2622: 2620: 2617: 2615: 2612: 2610: 2607: 2606: 2597: 2594: 2592: 2589: 2588: 2586: 2584: 2580: 2570: 2567: 2565: 2562: 2561: 2559: 2557: 2553: 2543: 2540: 2538: 2535: 2533: 2530: 2529: 2527: 2525: 2521: 2517: 2507: 2504: 2502: 2499: 2497: 2494: 2492: 2489: 2488: 2486: 2484: 2480: 2471: 2468: 2466: 2463: 2461: 2458: 2456: 2453: 2451: 2449: 2445: 2441: 2438: 2432: 2426: 2423: 2421: 2418: 2417: 2407: 2403: 2400: 2398: 2395: 2393: 2390: 2388: 2385: 2382: 2378: 2375: 2374: 2372: 2368: 2358: 2355: 2353: 2350: 2348: 2345: 2343: 2340: 2338: 2335: 2332: 2328: 2325: 2323: 2320: 2319: 2317: 2313: 2310: 2308: 2304: 2294: 2291: 2289: 2286: 2283: 2279: 2275: 2271: 2267: 2263: 2260: 2258: 2255: 2253: 2250: 2249: 2247: 2243: 2232: 2228: 2224: 2220: 2218: 2215: 2213: 2210: 2208: 2205: 2203: 2200: 2198: 2195: 2194: 2192: 2188: 2177: 2176:Neurotoxicity 2173: 2170: 2168: 2165: 2163: 2160: 2158: 2155: 2152: 2148: 2145:Selectivity ( 2144: 2143: 2141: 2137: 2128: 2125: 2123: 2120: 2118: 2115: 2113: 2110: 2108: 2105: 2103: 2099: 2096: 2094: 2090: 2084: 2083:Pharmacophore 2081: 2079: 2076: 2074: 2071: 2069: 2066: 2065: 2056: 2053: 2051: 2048: 2046: 2043: 2041: 2038: 2036: 2033: 2031: 2028: 2027: 2025: 2021: 2011: 2008: 2006: 2003: 2001: 1998: 1996: 1993: 1991: 1988: 1986: 1983: 1982: 1980: 1976: 1973: 1971: 1967: 1963: 1956: 1951: 1949: 1944: 1942: 1937: 1936: 1933: 1921: 1918: 1916: 1915:Pharmacophore 1913: 1911: 1908: 1906: 1903: 1901: 1898: 1896: 1893: 1891: 1888: 1886: 1883: 1881: 1878: 1876: 1873: 1871: 1868: 1866: 1863: 1861: 1858: 1856: 1853: 1851: 1848: 1846: 1843: 1841: 1840:Drug delivery 1838: 1836: 1833: 1831: 1830:Chemogenomics 1828: 1826: 1823: 1821: 1818: 1817: 1814: 1810: 1802: 1797: 1795: 1790: 1788: 1783: 1782: 1779: 1771: 1765: 1761: 1756: 1745: 1739: 1735: 1734: 1729: 1725: 1720: 1716: 1710: 1706: 1701: 1697: 1691: 1687: 1682: 1681: 1677: 1668: 1664: 1660: 1656: 1648: 1645: 1640: 1636: 1632: 1628: 1624: 1620: 1613: 1610: 1605: 1601: 1597: 1593: 1589: 1585: 1581: 1577: 1570: 1568: 1564: 1559: 1555: 1551: 1547: 1543: 1539: 1535: 1531: 1524: 1521: 1516: 1512: 1507: 1502: 1498: 1494: 1490: 1486: 1482: 1475: 1472: 1467: 1463: 1459: 1455: 1450: 1445: 1440: 1435: 1431: 1427: 1423: 1416: 1413: 1408: 1404: 1400: 1396: 1389: 1386: 1381: 1377: 1373: 1369: 1365: 1361: 1354: 1351: 1346: 1339: 1336: 1331: 1327: 1323: 1319: 1315: 1311: 1304: 1301: 1296: 1292: 1288: 1284: 1280: 1276: 1269: 1266: 1261: 1257: 1252: 1247: 1243: 1239: 1235: 1228: 1225: 1220: 1216: 1211: 1206: 1202: 1198: 1194: 1187: 1184: 1179: 1173: 1168: 1167: 1158: 1155: 1151: 1147: 1141: 1137: 1133: 1129: 1122: 1119: 1115: 1111: 1105: 1101: 1097: 1093: 1086: 1083: 1078: 1074: 1069: 1064: 1060: 1056: 1052: 1045: 1042: 1037: 1031: 1027: 1023: 1019: 1012: 1009: 1004: 998: 994: 990: 986: 979: 977: 975: 973: 969: 964: 958: 954: 950: 946: 939: 936: 931: 925: 921: 914: 911: 906: 900: 896: 892: 888: 881: 878: 871: 869: 866: 865: 860: 856: 852: 847: 842: 838: 834: 830: 825: 818: 814: 811: 809: 806: 804: 801: 799: 796: 795: 791: 789: 787: 777: 773: 769: 768: 766: 761: 757: 754: 751: 750: 748: 743: 740: 738: 734: 730: 726: 722: 718: 717: 715: 712: 710: 706: 703: 699: 695: 690: 686: 682: 678: 674: 671: 667: 666: 664: 661: 658: 655: 652: 648: 645: 641: 638: 634: 630: 626: 625: 624: 621: 619: 611: 609: 605: 600: 593: 586: 582: 578: 574: 567: 563: 559: 555: 551: 521: 517: 506: 502: 499: 486: 482: 471: 467: 464: 458: 455: 452: 435: 427: 426: 425: 423: 419: 411: 409: 407: 403: 399: 395: 390: 388: 382: 379: 375: 369: 367: 363: 330: 326: 312: 308: 305: 289: 285: 271: 267: 264: 258: 255: 252: 235: 227: 226: 225: 223: 219: 215: 211: 207: 203: 198: 195: 191: 187: 183: 180:(i.e., after 179: 176: 167: 160: 158: 155: 146: 144: 142: 138: 133: 131: 123: 121: 119: 115: 107: 102: 100: 98: 93: 91: 87: 83: 79: 75: 74:average value 70: 68: 64: 60: 56: 55:intravenously 51: 49: 45: 41: 37: 33: 19: 2659:Chemotherapy 2619:Cell biology 2520:Biochemistry 2444:Neuroscience 2392:Distribution 2356: 2322:Loading dose 2005:Superagonist 1962:Pharmacology 1910:Pharmacology 1824: 1759: 1747:. Retrieved 1732: 1724:Pigeot, Iris 1704: 1685: 1658: 1654: 1647: 1622: 1618: 1612: 1579: 1575: 1533: 1529: 1523: 1488: 1484: 1474: 1429: 1425: 1415: 1398: 1394: 1388: 1363: 1359: 1353: 1344: 1338: 1313: 1309: 1303: 1278: 1274: 1268: 1241: 1237: 1227: 1200: 1196: 1186: 1165: 1157: 1149: 1127: 1121: 1113: 1091: 1085: 1058: 1054: 1044: 1017: 1011: 984: 944: 938: 919: 913: 886: 880: 862: 855:generic drug 850: 846: 840: 837:theophylline 832: 828: 824: 822: 783: 622: 617: 615: 606: 598: 591: 584: 580: 576: 572: 565: 561: 553: 547: 417: 415: 405: 397: 391: 383: 373: 370: 365: 361: 359: 221: 217: 213: 209: 205: 199: 190:subcutaneous 172: 150: 137:pharmacology 134: 127: 117: 113: 111: 94: 84:is shown as 71: 52: 35: 32:pharmacology 29: 2744:Bactericide 2420:Compartment 2231:Patch clamp 2207:Schild plot 1845:Drug design 1449:2440/139693 864:Orange Book 691:vegetables) 662:differences 186:transdermal 175:intravenous 103:Definitions 2763:Categories 2624:Physiology 2556:Toxicology 2448:psychology 2397:Metabolism 2387:Absorption 2381:Liberation 2223:Organ bath 2151:Functional 2030:Antagonist 2023:Inhibitory 1978:Excitatory 1835:Drug class 1807:Topics in 872:References 637:solubility 194:sublingual 76:; to take 40:absorption 2406:Clearance 2402:Excretion 2221:Methods ( 1466:261062472 721:Phenytoin 660:Circadian 518:⋅ 483:⋅ 459:⋅ 402:clearance 327:⋅ 286:⋅ 259:⋅ 2524:genetics 2496:Pharmacy 2483:Medicine 2293:Affinity 2252:Efficacy 2190:Analysis 2172:Toxicity 1749:21 April 1726:(2007). 1639:11285360 1604:95122610 1596:18680438 1550:16863443 1515:25215170 1458:37605852 1380:98654832 1260:11285352 1219:11285351 1077:11285351 798:ADME-Tox 792:See also 778:function 723:induces 689:brassica 670:antacids 135:In both 2434:Related 2377:(L)ADME 2331:Initial 2315:Metrics 2262:Potency 2245:Metrics 2147:Binding 2117:Binding 1985:Agonist 1678:Sources 1667:7251238 1558:2383402 1506:4157693 1318:Bibcode 1295:8562338 772:hepatic 733:CYP2C19 681:pomello 579:= 0 to 154:soil pH 2436:fields 1766:  1740:  1711:  1692:  1665:  1637:  1602:  1594:  1556:  1548:  1513:  1503:  1464:  1456:  1378:  1293:  1258:  1217:  1174:  1142:  1106:  1075:  1032:  999:  959:  926:  901:  849:  827:  808:Caco-2 770:E.g., 737:CYP3A4 735:, and 729:CYP2C9 725:CYP1A2 714:Enzyme 698:efflux 651:fasted 400:) and 59:routes 2633:Other 2370:LADME 1600:S2CID 1554:S2CID 1462:S2CID 1376:S2CID 1291:S2CID 819:Notes 776:renal 653:state 583:= ∞, 422:above 192:, or 2522:and 2446:and 2282:TD50 2278:LD50 2274:ED50 2270:IC50 2266:EC50 2068:Drug 1820:ADME 1764:ISBN 1751:2011 1738:ISBN 1709:ISBN 1690:ISBN 1663:PMID 1635:PMID 1592:PMID 1546:PMID 1511:PMID 1454:PMID 1256:PMID 1215:PMID 1172:ISBN 1140:ISBN 1104:ISBN 1073:PMID 1030:ISBN 997:ISBN 957:ISBN 924:ISBN 899:ISBN 366:less 182:oral 95:For 44:drug 2379:: ( 1627:doi 1623:131 1584:doi 1538:doi 1501:PMC 1493:doi 1444:hdl 1434:doi 1430:180 1403:doi 1368:doi 1326:doi 1283:doi 1279:237 1246:doi 1242:131 1205:doi 1201:131 1132:doi 1096:doi 1063:doi 1059:131 1022:doi 989:doi 949:doi 891:doi 851:OB: 829:TH: 633:pKa 602:max 595:max 588:max 573:AUC 569:max 562:AUC 456:100 424:). 418:AUC 408:). 256:100 214:AUC 210:AUC 128:In 120:). 30:In 2765:: 2280:, 2276:, 2272:, 2268:, 2229:, 2225:, 2149:, 1730:. 1659:19 1657:. 1633:. 1621:. 1598:. 1590:. 1578:. 1566:^ 1552:. 1544:. 1532:. 1509:. 1499:. 1487:. 1483:. 1460:. 1452:. 1442:. 1428:. 1424:. 1399:55 1397:. 1374:. 1364:19 1362:. 1324:. 1314:27 1312:. 1289:. 1277:. 1254:. 1240:. 1236:. 1213:. 1199:. 1195:. 1148:. 1138:. 1112:. 1102:. 1071:. 1057:. 1053:. 1028:. 995:. 971:^ 955:. 897:. 758:, 731:, 727:, 687:, 683:, 679:, 635:, 631:, 604:. 554:BE 406:CL 188:, 92:. 50:. 34:, 2408:) 2404:( 2383:) 2333:) 2329:( 2284:) 2264:( 2233:) 2178:) 2174:( 2153:) 1954:e 1947:t 1940:v 1800:e 1793:t 1786:v 1772:. 1753:. 1717:. 1698:. 1669:. 1641:. 1629:: 1606:. 1586:: 1580:4 1560:. 1540:: 1534:2 1517:. 1495:: 1489:6 1468:. 1446:: 1436:: 1409:. 1405:: 1382:. 1370:: 1332:. 1328:: 1320:: 1297:. 1285:: 1262:. 1248:: 1221:. 1207:: 1180:. 1134:: 1098:: 1079:. 1065:: 1038:. 1024:: 1005:. 991:: 965:. 951:: 932:. 907:. 893:: 867:. 841:F 833:F 704:) 639:) 618:F 599:C 592:T 585:C 581:t 577:t 566:C 552:( 527:A 522:D 512:B 507:C 503:U 500:A 492:B 487:D 477:A 472:C 468:U 465:A 453:= 447:l 444:e 441:r 436:F 404:( 398:V 396:( 362:f 339:o 336:p 331:D 321:v 318:i 313:C 309:U 306:A 298:v 295:i 290:D 280:o 277:p 272:C 268:U 265:A 253:= 247:s 244:b 241:a 236:F 222:D 218:F 118:F 114:f 86:± 20:)

Index

Oral bioavailability
pharmacology
absorption
drug
systemic circulation
intravenously
routes
first-pass metabolism
area under the plasma drug concentration curve versus time
average value
population variability
deviation range
±
therapeutic window
dietary supplements
nutritional science
pharmacology
area under curve
soil pH

intravenous
administration
oral
transdermal
subcutaneous
sublingual
pharmacokinetic
isotopically labelled drug
pharmacodynamics
volume of distribution

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