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Me-too drug

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488:... this often represent(s) advances in safety and efficacy, along with providing new formulations and dosing options that significantly increase patient compliance. From an economic standpoint, expanding drug classes represent the possibility of lower drug prices as competition between manufacturers is increased. Additionally, pharmaceutical companies depend on incremental innovations to provide the revenue that will support the development of more risky “block-buster” drugs. Policies aimed at curbing incremental innovation will ultimately lead to a reduction in the overall quality of existing drug classes and may ultimately curb the creation of novel drugs. 119:, then Senator of Tennessee, led a series of hearings enquiring about the pharmaceutical industry's motive to produce me-too drugs after it was noted that much of their time and resources were spent producing them. Subsequently, the FDA required drug companies to prove their drugs were safe and effective. In 1964, 442:
For example, Celexa is a mixture of a left-handed and right-handed version of the same compound ("citalopram"), but only the left-handed version ("es-citalopram") is biologically active. Lexapro, the "me too" drug released several years after Celexa thus extending the patent life, is a purified form
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that metabolize into the same active compound. Gilead has been accused in lawsuits of "slow walking" the development of the me-too drug; however, such lawsuits further a market perception the me-too drug is "safer." This drives sales of the more expensive me-too drug when both drugs have virtually
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under clinical development were “me-too” drugs. At the beginning of 2020, the WHO stated that only two of the 50 antibiotics in clinical development are active against serious drug resistant gram-negative bacteria, and most are not significant "upgrades" of drugs.
40:, and used to treat conditions for which drugs already exist. While pharmaceutical companies have justified the development of me-toos as offering incremental improvements in efficacy, side-effects, compliance and cost, critics have questioned the increasing 103:, referred to “the problem of the introduction of ‘me too’ drugs, that is, drugs without signal advantage of any sort”. Once a new drug class was discovered, other major drug companies made efforts to produce their own similar versions. Pharmacologist 111:
noted "the great drug therapy era was marked not only by the introduction of new drugs in great profusion and by the launching of large promotional campaigns but also by the introduction of what are known as 'duplicative' or 'me-too' products".
352:(FDA) in 1987, the understanding of the link between cholesterol and heart disease was improving, and the potential market for the drug became significant. Subsequently, several other companies developed similar drugs: Merck developed Zocor ( 495:
Many physicians are unaware that me-toos are compared to placebos rather than pre-existing drugs. Me-toos are seen as patentable new drugs and therefore substantial profit makers, where innovative drugs may be more risky to develop.
61:, referred to “the problem of the introduction of ‘me too’ drugs, that is, drugs without signal advantage of any sort”. However, me-too drugs can be novel compounds themselves. They are commonly used and include several 154: 1266:"Pharmacokinetics of acyclovir and its metabolites in cerebrospinal fluid and systemic circulation after administration of high-dose valacyclovir in subjects with normal and impaired renal function" 285:. It was shown to preserve revenues of Prilosec, whose U.S. patent expired in 2001. Considered a new drug by the FDA, Nexium was patented separately, sold for eight times the cost of its 86: 99: 57: 504:
Between 1998 and 2003, the U.S. Food and Drug Administration (FDA) approved 487 drugs, of which 78 per cent appeared to have similar characteristics to pre-existing marketed drugs.
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and advertised as significantly better than its predecessor, a move the company received much criticism for, with a subsequent class action lawsuit filed against them.
472:, first FDA approved in the mid-1980s. Valtrex metabolizes into acyclovir in the liver, but when it first entered the market, it cost many times than the generic. 1132: 149: 123:
described me-too drugs as being “hard to justify putting into man at all, let alone on the market”. Three years later, the term appeared in the
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Patterson, Julie A.; Carroll, Norman V. (May 2020). "Should the United States government regulate prescription prices? A critical review".
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is a me-too which was granted its patent by showing that it was effective for heartburn, not that it was better than its precursor,
416: 577:"Me‐too pharmaceutical products: History, definitions, examples, and relevance to drug shortages and essential medicines lists" 1386: 1359: 1115: 1085: 1003: 973: 893: 866: 173:"drugs that are chemically related to the prototype, or other chemical compounds which have an identical mechanism of action" 484:
defended me-toos, describing their development as "incremental improvements on already existing drugs". The report stated:
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Mazzucato, Mariana; Li, Henry Lishi; Darzi, Ara (4 March 2020). "Is it time to nationalise the pharmaceutical industry?".
1515: 1330: 1402: 1317: 250:. Successive differences between β-blockers have had a combined cumulative effect and are seen as "innovative". 179:"a drug with a similar chemical structure or the same mechanism of action as a drug that is already marketed". 1246: 719: 1572: 481: 349: 219: 215: 1170:
Oldani, Michael (2009). "Understanding the 'Therapeutic Embrace' between Big Pharma and Modern Medicine".
32:, usually by making minor modifications to the prototype, reflected in slight changes in the profiles of 524: 336:
being its first me-too. Most were as efficient as each other and had similar adverse effect profiles.
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More than 60% of medicines listed on the World Health Organization's essential list are me‐too drugs.
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Patents for Development: Improved Patent Information Disclosure and Access for Incremental Innovation
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Mason, Jonathan (5 October 2013). "Introduction of biosimilars: not to be confused with generics".
459:, a popular Antiretroviral also used to prevent HIV infection in healthy people. Both versions are 45: 41: 1325:. International Policy Network; Working Papers on Intellectual Property, Innovation and Health. 1148: 1423:
Buccafusco, Christopher; Masur, Jonathan S. (31 March 2020). "Drugs, Patents, and Well-Being".
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have been developed for maintenance treatment in chronic depression. These include Paxil (
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were marketed in the UK between 1960 and 1982, of which seven were produced by Roche.
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Jena, Anupam B.; Calfee, John E.; Mansley, Edward C.; Philipson, Tomas J. (2009).
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This incremental innovation has led to some referring to me-toos as "me-betters".
468:, first FDA approved in 2001 to treat persistent herpes outbreaks is a prodrug of 791: 259: 176:"drugs which have more or less identical clinical outcomes to pre‐existing drugs" 66: 1567: 1077:
The Truth About the Drug Companies: How They Deceive Us and What to Do About It
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There is no agreed definition, however, several have been proposed, including:
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The Influence of the Pharmaceutical Industry: Fourth Report of Session 2004-05
644: 1556: 1071: 404: 400: 325: 120: 108: 62: 129:. In the early 1970s, Silverman and Lee reported that there were almost 100 1481: 1299: 1232: 1156: 1054: 1036: 826: 775: 766: 663: 612: 465: 432: 385: 365: 357: 289: 286: 693: 1463: 1281: 1214: 965: 511: 381: 373: 353: 278: 223: 138: 33: 1534: 1183: 436: 428: 424: 420: 396: 345: 305: 247: 243: 235: 203: 199: 183: 1375:
Great Britain: Parliament: House of Commons: Health Committee (2005).
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Biosimilars: Regulatory, Clinical, and Biopharmaceutical Development
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are compared with other biosimilars and are therefore not me-toos.
1405:. House of Commons, Select Committee on Health Minutes of Evidence 308:'s prices increased following the arrival of further me-too drugs 460: 456: 412: 301: 227: 74: 48:
resources and their impact on the innovation of new treatments.
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of just the left-handed version (the "es" in "es-citalopram").
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The $ 800 Million Pill: The Truth Behind the Cost of New Drugs
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Pharmacoevolution: the advantages of incremental innovation
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The first-in-class β-blocker pronethalol was developed by
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The term "me‐too drugs" was coined in the 1950s. In 1956,
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Garattini, Silvio (1997). "Are me-too drugs justified?".
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was the first-in-class of the tricyclic antidepressants.
1497:"A Market Failure for Antimicrobial Resistant Medicines" 1199:"Stereoisomers in Psychiatry: The Case of Escitalopram" 575:
Aronson, Jeffrey K.; Green, A. Richard (13 May 2020).
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are some of the me-toos that followed. Several me-too
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Gutka, Hiten J.; Yang, Harry; Kakar, Shefali (2018).
1354:. Cheltenham: Edward Elgar Publishing. p. 150. 948:. In Brenkert, George G.; Beauchamp, Tom L. (eds.). 861:. University of California Press. pp. 209–230. 1403:"Memorandum by Professor Patrick Vallance (PI 106)" 1316:Wertheimer, Albert I.; Santella, Thomas M. (2005). 1315: 344:When Merck's cholesterol-lowering statin Mevacor ( 170:"multiple drugs within the same therapeutic class" 1311: 1309: 1554: 1495:O'Brien, Michael K.; Chu, Philip (8 July 2020). 1345: 946:"Just Access to Health Care and Pharmaceuticals" 804: 743: 625: 1422: 1021:"'Me-Too' Innovation in Pharmaceutical Markets" 987: 985: 675: 673: 1494: 1416: 1306: 1099: 1097: 1066: 1064: 881: 807:Research in Social and Administrative Pharmacy 324:Several me-toos followed the prototype of the 1368: 1080:. Random House Publishing Group. p. 80. 713: 711: 89:Louis Goodman, who coined the phrase "me-too" 1339: 982: 737: 670: 574: 1395: 1149:10.1001/virtualmentor.2010.12.10.msoc2-1010 1094: 1061: 619: 1439: 1124: 708: 570: 568: 566: 564: 562: 560: 1507: 1471: 1289: 1222: 1044: 848: 846: 844: 765: 679: 653: 643: 602: 592: 558: 556: 554: 552: 550: 548: 546: 544: 542: 540: 265: 991: 902: 875: 798: 581:British Journal of Clinical Pharmacology 84: 1488: 1448:"Excess in the pharmaceutical industry" 1103: 1025:Forum for Health Economics & Policy 958:10.1093/oxfordhb/9780195307955.003.0008 852: 417:Selective serotonin reuptake inhibitors 1555: 1445: 1381:. The Stationery Office. p. 204. 1169: 1163: 1130: 1107:An Introduction to Medicinal Chemistry 1070: 950:The Oxford Handbook of Business Ethics 943: 841: 717: 537: 464:identical safety profiles. Similarly, 1513: 1263: 1203:Prim Care Companion J Clin Psychiatry 1196: 908: 626:Vincent Rajkumar, S. (23 June 2020). 1452:Canadian Medical Association Journal 1131:Greene, Jeremy A. (1 October 2010). 13: 720:"Me-too drugs: is there a problem" 718:Hollis, Aidan (13 December 2004). 391: 253: 158:referred to me-too as "me-again". 14: 1584: 319: 295: 24:" refers to a medication that is 1425:Washington University Law Review 209: 44:of me-toos, their absorption of 1257: 1239: 1190: 1012: 1501:Applied Clinical Trials Online 1446:Angell, M. (7 December 2004). 1: 995:Business Ethics of Innovation 952:. OUP USA. pp. 202–232. 819:10.1016/j.sapharm.2019.06.010 725:. World Health Organization. 530: 499: 446: 161: 1514:Price, W. Nicholson (2020). 482:International Policy Network 350:Food and Drug Administration 7: 1270:Antimicrob Agents Chemother 1110:. OUP Oxford. p. 181. 1104:Patrick, Graham L. (2013). 518: 510:In September 2019, half of 348:) was approved by the U.S. 189: 10: 1589: 339: 80: 1346:Nefissa Chakroun (2016). 1253:. No. July 23, 2023. 888:. Springer. p. 129. 853:Goozner, Merrill (2005). 645:10.1038/s41408-020-0338-x 480:In 2005, a report by the 475: 126:Oxford English Dictionary 998:. Springer. p. 44. 944:Menzel, Paul T. (2012). 46:research and development 1197:Burke, William (2002). 992:Hanekamp, Gerd (2007). 115:Between 1960 and 1962, 1037:10.2202/1558-9544.1138 490: 266:Proton pump inhibitors 90: 1516:"The Cost of Novelty" 1264:Smith, James (2010). 1137:AMA Journal of Ethics 682:Journal of Nephrology 486: 372:developed Pravachol ( 272:proton-pump inhibitor 222:. It was followed by 194:Me-too drugs include 155:Clinical Pharmacology 88: 71:stomach acid reducing 1464:10.1503/cmaj.1041594 1282:10.1128/AAC.00729-09 1215:10.4088/pcc.v04n0107 632:Blood Cancer Journal 525:Unique selling point 455:is a me-too drug of 370:Bristol-Myers Squibb 75:cholesterol lowering 1573:Medical terminology 1523:Columbia Law Review 1172:Pharmacy in History 364:developed Lipitor ( 220:ICI Pharmaceuticals 137:, greater than 270 384:). Others include 380:developed Lescol ( 150:Desmond Laurence's 141:and more than 200 100:Goodman and Gilman 91: 58:Goodman and Gilman 1458:(12): 1451–1453. 1388:978-0-215-02457-2 1361:978-1-78536-860-8 1117:978-0-19-969739-7 1087:978-1-58836-211-7 1005:978-3-540-72309-7 975:978-0-19-991622-1 895:978-3-319-99679-0 868:978-0-520-24670-6 594:10.1111/bcp.14327 587:(11): 2114–2122. 451:Gilead Science's 30:pre-existing drug 1580: 1563:Drug development 1547: 1546: 1520: 1511: 1505: 1504: 1492: 1486: 1485: 1475: 1443: 1437: 1436: 1420: 1414: 1413: 1411: 1410: 1399: 1393: 1392: 1372: 1366: 1365: 1343: 1337: 1336: 1324: 1313: 1304: 1303: 1293: 1276:(3): 1146–1151. 1261: 1255: 1254: 1243: 1237: 1236: 1226: 1194: 1188: 1187: 1167: 1161: 1160: 1128: 1122: 1121: 1101: 1092: 1091: 1068: 1059: 1058: 1048: 1016: 1010: 1009: 989: 980: 979: 941: 935: 934: 923:10.1002/psb.1108 906: 900: 899: 879: 873: 872: 850: 839: 838: 802: 796: 795: 769: 758:10.1136/bmj.m769 741: 735: 734: 724: 715: 706: 705: 677: 668: 667: 657: 647: 623: 617: 616: 606: 596: 572: 105:Milton Silverman 95:Louis S. Goodman 53:Louis S. Goodman 1588: 1587: 1583: 1582: 1581: 1579: 1578: 1577: 1553: 1552: 1551: 1550: 1518: 1512: 1508: 1493: 1489: 1444: 1440: 1421: 1417: 1408: 1406: 1401: 1400: 1396: 1389: 1373: 1369: 1362: 1344: 1340: 1333: 1322: 1314: 1307: 1262: 1258: 1245: 1244: 1240: 1195: 1191: 1168: 1164: 1143:(10): 818–823. 1129: 1125: 1118: 1102: 1095: 1088: 1069: 1062: 1017: 1013: 1006: 990: 983: 976: 942: 938: 907: 903: 896: 880: 876: 869: 851: 842: 803: 799: 742: 738: 722: 716: 709: 678: 671: 624: 620: 573: 538: 533: 521: 502: 478: 449: 394: 392:Antidepressants 356:) and Crestor ( 342: 322: 298: 268: 260:benzodiazepines 256: 254:Benzodiazepines 212: 192: 164: 97:, co‐editor of 83: 67:antidepressants 55:, co‐editor of 12: 11: 5: 1586: 1576: 1575: 1570: 1565: 1549: 1548: 1529:(3): 769–835. 1506: 1487: 1438: 1415: 1394: 1387: 1367: 1360: 1338: 1331: 1305: 1256: 1251:New York Times 1238: 1189: 1162: 1123: 1116: 1093: 1086: 1072:Angell, Marcia 1060: 1011: 1004: 981: 974: 936: 901: 894: 874: 867: 840: 813:(5): 717–723. 797: 736: 707: 669: 618: 535: 534: 532: 529: 528: 527: 520: 517: 501: 498: 477: 474: 448: 445: 435:) and Prozac ( 393: 390: 341: 338: 321: 320:ACE inhibitors 318: 297: 296:H2 antagonists 294: 267: 264: 255: 252: 211: 208: 191: 188: 181: 180: 177: 174: 171: 163: 160: 135:antihistamines 131:tranquillisers 117:Estes Kefauver 107:and physician 82: 79: 22:follow-on drug 9: 6: 4: 3: 2: 1585: 1574: 1571: 1569: 1566: 1564: 1561: 1560: 1558: 1544: 1540: 1536: 1532: 1528: 1524: 1517: 1510: 1502: 1498: 1491: 1483: 1479: 1474: 1469: 1465: 1461: 1457: 1453: 1449: 1442: 1434: 1430: 1426: 1419: 1404: 1398: 1390: 1384: 1380: 1379: 1371: 1363: 1357: 1353: 1349: 1342: 1334: 1332:1-905041-05-5 1328: 1321: 1320: 1312: 1310: 1301: 1297: 1292: 1287: 1283: 1279: 1275: 1271: 1267: 1260: 1252: 1248: 1242: 1234: 1230: 1225: 1220: 1216: 1212: 1208: 1204: 1200: 1193: 1185: 1181: 1177: 1173: 1166: 1158: 1154: 1150: 1146: 1142: 1138: 1134: 1127: 1119: 1113: 1109: 1108: 1100: 1098: 1089: 1083: 1079: 1078: 1073: 1067: 1065: 1056: 1052: 1047: 1042: 1038: 1034: 1030: 1026: 1022: 1015: 1007: 1001: 997: 996: 988: 986: 977: 971: 967: 966:10822/1025918 963: 959: 955: 951: 947: 940: 932: 928: 924: 920: 916: 912: 905: 897: 891: 887: 886: 878: 870: 864: 860: 856: 849: 847: 845: 836: 832: 828: 824: 820: 816: 812: 808: 801: 793: 789: 785: 781: 777: 773: 768: 767:10044/1/86122 763: 759: 755: 751: 747: 740: 732: 728: 721: 714: 712: 703: 699: 695: 691: 688:(6): 283–94. 687: 683: 676: 674: 665: 661: 656: 651: 646: 641: 637: 633: 629: 622: 614: 610: 605: 600: 595: 590: 586: 582: 578: 571: 569: 567: 565: 563: 561: 559: 557: 555: 553: 551: 549: 547: 545: 543: 541: 536: 526: 523: 522: 516: 513: 508: 505: 497: 493: 489: 485: 483: 473: 471: 467: 462: 458: 454: 444: 440: 438: 434: 430: 426: 422: 418: 414: 410: 406: 405:Nortriptyline 402: 401:Amitriptyline 398: 389: 387: 383: 379: 375: 371: 367: 363: 359: 355: 351: 347: 337: 335: 331: 327: 326:ace inhibitor 317: 315: 311: 307: 303: 293: 291: 288: 284: 280: 276: 273: 263: 261: 251: 249: 245: 241: 237: 233: 229: 225: 221: 217: 210:Beta blockers 207: 205: 201: 197: 187: 185: 178: 175: 172: 169: 168: 167: 159: 157: 156: 151: 146: 144: 140: 136: 132: 128: 127: 122: 121:Louis Lasagna 118: 113: 110: 109:Philip R. Lee 106: 102: 101: 96: 87: 78: 76: 72: 68: 64: 63:beta blockers 60: 59: 54: 49: 47: 43: 39: 35: 31: 27: 23: 19: 1526: 1522: 1509: 1500: 1490: 1455: 1451: 1441: 1424: 1418: 1407:. Retrieved 1397: 1377: 1370: 1351: 1341: 1318: 1273: 1269: 1259: 1250: 1241: 1209:(1): 20–24. 1206: 1202: 1192: 1178:(2): 75–86. 1175: 1171: 1165: 1140: 1136: 1126: 1106: 1076: 1028: 1024: 1014: 994: 949: 939: 914: 910: 904: 884: 877: 858: 810: 806: 800: 749: 745: 739: 685: 681: 635: 631: 621: 584: 580: 509: 506: 503: 494: 491: 487: 479: 450: 441: 433:escitalopram 431:), Lexapro ( 395: 386:pitavastatin 366:atorvastatin 358:rosuvastatin 343: 323: 299: 290:esomeprazole 269: 257: 213: 193: 182: 165: 153: 147: 143:sulfonamides 124: 114: 98: 92: 56: 50: 34:side effects 21: 17: 15: 512:antibiotics 427:), Zoloft ( 423:), Celexa ( 388:(Livalo). 382:fluvastatin 374:pravastatin 354:simvastatin 279:AstraZeneca 224:propranolol 216:James Black 184:Biosimilars 139:antibiotics 18:me-too drug 1557:Categories 1409:2020-07-21 911:Prescriber 792:2371182316 531:References 500:Statistics 447:Antivirals 437:fluoxetine 429:sertraline 425:citalopram 421:paroxetine 397:Imipramine 346:lovastatin 248:bisoprolol 244:acebutolol 236:metoprolol 204:esketamine 200:ranitidine 162:Definition 16:The term " 917:(19): 7. 855:"Me Too!" 835:195761512 784:212416521 638:(6): 71. 470:acyclovir 409:Dosulepin 334:enalapril 330:captopril 240:labetalol 232:practolol 152:textbook 148:In 1994, 51:In 1956, 42:marketing 1535:26910477 1482:15583183 1300:20038622 1233:15014731 1184:41112425 1157:23186743 1074:(2004). 1055:29081727 1031:(1): 5. 931:56581328 827:31248779 788:ProQuest 776:32132003 752:: m769. 664:32576816 613:32358800 519:See also 461:prodrugs 378:Novartis 283:Prilosec 196:diazepam 190:Examples 38:activity 1543:3350477 1433:3565320 1291:2825963 1046:5659838 731:3142385 702:7039484 694:9442441 655:7311400 604:7576625 466:Valtrex 457:Truvada 453:Descovy 413:Doxepin 376:), and 340:Statins 332:, with 304:'s and 302:Tagamet 287:generic 228:sotalol 81:History 77:drugs. 26:similar 1541:  1533:  1480:  1473:534578 1470:  1431:  1385:  1358:  1329:  1298:  1288:  1231:  1224:314378 1221:  1182:  1155:  1114:  1084:  1053:  1043:  1002:  972:  929:  892:  865:  833:  825:  790:  782:  774:  729:  700:  692:  662:  652:  611:  601:  476:Debate 362:Pfizer 310:Pepcid 306:Zantac 275:Nexium 133:, 130 20:" or " 1568:Drugs 1531:JSTOR 1519:(PDF) 1323:(PDF) 1180:JSTOR 927:S2CID 831:S2CID 780:S2CID 727:S2CID 723:(PDF) 698:S2CID 300:Both 28:to a 1539:SSRN 1478:PMID 1429:SSRN 1383:ISBN 1356:ISBN 1327:ISBN 1296:PMID 1229:PMID 1153:PMID 1112:ISBN 1082:ISBN 1051:PMID 1000:ISBN 970:ISBN 890:ISBN 863:ISBN 823:PMID 772:PMID 690:PMID 660:PMID 609:PMID 411:and 314:Axid 312:and 270:The 246:and 202:and 73:and 69:and 1527:120 1468:PMC 1460:doi 1456:171 1286:PMC 1278:doi 1219:PMC 1211:doi 1145:doi 1041:PMC 1033:doi 962:hdl 954:doi 919:doi 815:doi 762:hdl 754:doi 750:368 746:BMJ 650:PMC 640:doi 599:PMC 589:doi 439:). 368:), 360:), 277:by 258:15 218:at 36:or 1559:: 1537:. 1525:. 1521:. 1499:. 1476:. 1466:. 1454:. 1450:. 1427:. 1350:. 1308:^ 1294:. 1284:. 1274:54 1272:. 1268:. 1249:. 1227:. 1217:. 1205:. 1201:. 1176:51 1174:. 1151:. 1141:12 1139:. 1135:. 1096:^ 1063:^ 1049:. 1039:. 1029:12 1027:. 1023:. 984:^ 968:. 960:. 925:. 915:24 913:. 857:. 843:^ 829:. 821:. 811:16 809:. 786:. 778:. 770:. 760:. 748:. 710:^ 696:. 686:10 684:. 672:^ 658:. 648:. 636:10 634:. 630:. 607:. 597:. 585:86 583:. 579:. 539:^ 407:, 403:, 328:, 316:. 242:, 238:, 234:, 230:, 226:, 206:. 198:, 145:. 65:, 1545:. 1503:. 1484:. 1462:: 1435:. 1412:. 1391:. 1364:. 1335:. 1302:. 1280:: 1235:. 1213:: 1207:4 1186:. 1159:. 1147:: 1120:. 1090:. 1057:. 1035:: 1008:. 978:. 964:: 956:: 933:. 921:: 898:. 871:. 837:. 817:: 794:. 764:: 756:: 733:. 704:. 666:. 642:: 615:. 591::

Index

similar
pre-existing drug
side effects
activity
marketing
research and development
Louis S. Goodman
Goodman and Gilman
beta blockers
antidepressants
stomach acid reducing
cholesterol lowering

Louis S. Goodman
Goodman and Gilman
Milton Silverman
Philip R. Lee
Estes Kefauver
Louis Lasagna
Oxford English Dictionary
tranquillisers
antihistamines
antibiotics
sulfonamides
Desmond Laurence's
Clinical Pharmacology
Biosimilars
diazepam
ranitidine
esketamine

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