Knowledge

Macrolide

Source 📝

807:, which are cholesterol-lowering drugs that are mainly metabolized by CYP3A4. Co-administration of clarithromycin or erythromycin with statins can increase the risk of statin-induced myopathy, a condition that causes muscle pain and damage. Azithromycin, however, does not significantly affect the pharmacokinetics of statins and is considered a safer alternative. Another option is to use fluvastatin, a statin that is metabolized by CYP2C9, an enzyme that is not inhibited by clarithromycin. 52: 792:, on the other hand, has a 15-membered lactone ring, which is less susceptible to demethylation and nitrosoalkene formation. Therefore, azithromycin is a weak inhibitor of CYP3A4, while clarithromycin and erythromycin are strong inhibitors which increase the area under the curve (AUC) value of co-administered drugs more than five-fold. AUC it is a measure of the drug exposure in the body over time. By inhibiting CYP3A4, macrolide antibitiotics, such as 451: 33: 62: 800:, but not azithromycin, can significantly increase the AUC of the drugs that depend on it for clearance, which can lead to higher risk of adverse effects or drug-drug interactions. Azithromycin stands apart from other macrolide antibiotics because it is a weak inhibitor of CYP3A4, and does not significantly increase AUC value of co-administered drugs. 754:, a condition where bile cannot flow from the liver to the duodenum. A study reported in 2019 found an association between erythromycin use during infancy and developing IHPS (Infantile hypertrophic pyloric stenosis) in infants. However, no significant association was found between macrolides use during pregnancy or breastfeeding. 776:
ring and sugar moieties. They can inhibit CYP3A4 by a mechanism called mechanism-based inhibition (MBI), which involves the formation of reactive metabolites that bind covalently and irreversibly to the enzyme, rendering it inactive. MBI is more serious and long-lasting than reversible inhibition,
400:
in airways. The antimicrobial and antibiotic effects of macrolides, however, are not believed to be involved in their beneficial effects toward treating DPB. This is evident, as the treatment dosage is much too low to fight infection, and in DPB cases with the occurrence of the macrolide-resistant
1285:
Hougaard Christensen MM, Bruun Haastrup M, Øhlenschlaeger T, Esbech P, Arnspang Pedersen S, Bach Dunvald AC, Bjerregaard Stage T, Pilsgaard Henriksen D, Thestrup Pedersen AJ (April 2020). "Interaction potential between clarithromycin and individual statins-A systematic review".
284:
herbivores, such as horses and rabbits. They rapidly produce a reaction causing fatal digestive disturbance. It can be used in horses less than one year old, but care must be taken that other horses (such as a foal's mare) do not come in contact with the macrolide treatment.
1947:
Abdellatif M, Ghozy S, Kamel MG, Elawady SS, Ghorab MM, Attia AW, Le Huyen TT, Duy DT, Hirayama K, Huy NT (March 2019). "Association between exposure to macrolides and the development of infantile hypertrophic pyloric stenosis: a systematic review and meta-analysis".
768:
is an enzyme that metabolizes many drugs in the liver. Macrolides inhibit CYP3A4, which means they reduce its activity and increase the blood levels of the drugs that depend on it for elimination. This can lead to adverse effects or drug-drug interactions.
540:
are a class of antibiotics that are structurally related to the macrolides. They are used to treat respiratory tract infections caused by macrolide-resistant bacteria. Ketolides are especially effective, as they have two ribosomal binding sites.
1873:
Honein MA, Paulozzi LJ, Himelright IM, Lee B, Cragan JD, Patterson L, Correa A, Hall S, Erickson JD (1999). "Infantile hypertrophic pyloric stenosis after pertussis prophylaxis with erythromcyin: a case review and cohort study".
679:
Two other forms of acquired resistance include the production of drug-inactivating enzymes (esterases or kinases), as well as the production of active ATP-dependent efflux proteins that transport the drug outside of the cell.
197:, stemmed from chemically modifying erythromycin; these compounds were designed to be more easily absorbed and have fewer side-effects (erythromycin caused gastrointestinal side-effects in a significant proportion of users). 1017: 1557: 747:
in bile from the liver. This can lead to a buildup of the product in the system, thereby causing nausea. In infants the use of erythromycin has been associated with pyloric stenosis.
2264: 1065:
Tenson T, Lovmar M, Ehrenberg M (July 2003). "The mechanism of action of macrolides, lincosamides and streptogramin B reveals the nascent peptide exit path in the ribosome".
788:
have a 14-membered lactone ring, which is more prone to demethylation by CYP3A4 and subsequent formation of nitrosoalkenes, the reactive metabolites that cause MBI.
2085:"Macrolide - induced clinically relevant drug interactions with cytochrome P-450A (CYP) 3A4: an update focused on clarithromycin, azithromycin and dirithromycin" 2224: 2257: 484: 814:
as it may lead to colchicine toxicity. Symptoms of colchicine toxicity include gastrointestinal upset, fever, myalgia, pancytopenia, and organ failure.
570:
Fluoroketolides are a class of antibiotics that are structurally related to the ketolides. The fluoroketolides have three ribosomal interaction sites.
2250: 1030:
Drainas D, Kalpaxis DL, Coutsogeorgopoulos C (April 1987). "Inhibition of ribosomal peptidyltransferase by chloramphenicol. Kinetic studies".
1838:
SanFilippo A (April 1976). "Infantile hypertrophic pyloric stenosis related to ingestion of erythromycine estolate: A report of five cases".
1991:
Hansen MP, Scott AM, McCullough A, Thorning S, Aronson JK, Beller EM, Glasziou PP, Hoffmann TC, Clark J, Del Mar CB (18 January 2019).
369:
The macrolide antibiotics erythromycin, clarithromycin, and roxithromycin have proven to be an effective long-term treatment for the
1102:"Differential modulation of cytokine production by macrolides: interleukin-6 production is increased by spiramycin and erythromycin" 133:
In general, any macrocyclic lactone having greater than 8-membered rings are candidates for this class. The macrocycle may contain
388:
With macrolide therapy in DPB, great reduction in bronchiolar inflammation and damage is achieved through suppression of not only
231:), and some respiratory tract and soft-tissue infections. The antimicrobial spectrum of macrolides is slightly wider than that of 2242: 189:
in cases where patients were allergic to penicillin or had penicillin-resistant illnesses. Later macrolides developed, including
3060: 2213: 1522: 1202:
López-Boado YS, Rubin BK (June 2008). "Macrolides as immunomodulatory medications for the therapy of chronic lung diseases".
977: 896: 1719:"Mechanisms of Resistance to Macrolides and Lincosamides: Nature of the Resistance Elements and Their Clinical Implications" 1450:"Cruentaren A, a highly cytotoxic benzolactone from Myxobacteria is a novel selective inhibitor of mitochondrial F1-ATPases" 2040:
Zhang L, Xu X, Badawy S, Ihsan A, Liu Z, Xie C, Wang X, Tao Y (2020). "A Review: Effects of Macrolides on CYP450 Enzymes".
288:
Macrolides can be administered in a variety of ways, including tablets, capsules, suspensions, injections and topically.
1239:"Macrolide activities beyond their antimicrobial effects: macrolides in diffuse panbronchiolitis and cystic fibrosis" 993: 3077: 2231: 757:
A Cochrane review showed gastrointestinal symptoms to be the most frequent adverse event reported in literature.
684: 2152:"Colchicine and macrolides: a cohort study of the risk of adverse outcomes associated with concomitant exposure" 803:
The difference in CYP3A4 inhibition by macrolides has clinical implications, for example, for patients who take
693:) in penicillin-sensitive patients; however, macrolide-resistant strains of GAS occur with moderate frequency. 251:
are usually susceptible to macrolides. Unlike penicillin, macrolides have been shown to be effective against
235:, and, therefore, macrolides are a common substitute for patients with a penicillin allergy. Beta-hemolytic 1605:"A neglected and emerging antimicrobial resistance gene encodes for a serine-dependent macrolide esterase" 2277: 302: 2765: 2669: 2320: 1020:
Pharmamotion. Author: Gary Kaiser. The Community College of Baltimore County. Retrieved on July 31, 2009
17: 832: 461:
Not approved in the US by FDA but approved in the other countries by respective national authorities:
3009: 640:
A variety of toxic macrolides produced by bacteria have been isolated and characterized, such as the
97:, may be attached. The lactone rings are usually 14-, 15-, or 16-membered. Macrolides belong to the 2528: 653: 374: 211: 169:
family) are excluded. Included are not only 12-16 membered macrocycles but also larger rings as in
2272: 3065: 740: 719:. This is because some macrolides (clarithromycin and erythromycin, not azithromycin) are potent 707: 117:
is also a macrolide and was originally developed as an antifungal, but has since been used as an
1018:
Protein synthesis inhibitors: macrolides mechanism of action animation. Classification of agents
2411: 743:; that is, the drug is absorbed in the gut and sent to the liver, only to be excreted into the 689: 403: 389: 253: 227: 216: 206: 118: 2134:"Life Threatening Colchicine Drug Interactions. Drug Interactions: Insights and Observations" 330: 270: 2718: 1759: 1616: 1461: 1330: 377:(DPB). The successful results of macrolides in DPB stems from controlling symptoms through 314: 221: 8: 3104: 2347: 1993:"Adverse events in people taking macrolide antibiotics versus placebo for any indication" 1514: 780:
The degree of MBI by macrolides depends on the size and structure of their lactone ring.
736: 617: 318: 306: 110: 1620: 1465: 1334: 2176: 2151: 2109: 2084: 2065: 2017: 1992: 1973: 1899: 1820: 1645: 1604: 1603:
Dhindwal P, Thompson C, Kos D, Planedin K, Jain R, Jelinski M, Ruzzini A (2023-02-21).
1533: 1498: 1181: 1043: 857: 2053: 1887: 1425: 1400: 1284: 1126: 1101: 1078: 2989: 2985: 2554: 2209: 2181: 2114: 2100: 2069: 2057: 2022: 1965: 1926: 1891: 1855: 1851: 1812: 1771: 1740: 1699: 1691: 1650: 1632: 1585: 1577: 1538: 1518: 1479: 1430: 1381: 1364:
Nguyen M, Chung EP (August 2005). "Telithromycin: the first ketolide antimicrobial".
1346: 1321:
Rezanka T, Sigler K (February 2008). "Biologically active compounds of semi-metals".
1303: 1260: 1219: 1173: 1156:
Keicho N, Kudoh S (2002). "Diffuse panbronchiolitis: role of macrolides in therapy".
1131: 1082: 1047: 973: 947: 929: 925: 892: 862: 657: 602: 2133: 1977: 1903: 1377: 1342: 3037: 2981: 2609: 2171: 2163: 2104: 2096: 2049: 2012: 2008: 2004: 1957: 1883: 1847: 1824: 1804: 1730: 1681: 1640: 1624: 1569: 1528: 1510: 1469: 1420: 1412: 1373: 1338: 1295: 1250: 1211: 1185: 1165: 1121: 1113: 1074: 1039: 921: 852: 844: 720: 665: 353: 310: 2297: 1474: 1449: 731:. Macrolides, mainly erythromycin and clarithromycin, also have a class effect of 3028: 3023: 2735: 2604: 2599: 1416: 732: 724: 326: 185:, which was first used in 1952. Erythromycin was widely used as a substitute to 75: 2293: 2289: 2285: 2281: 3071: 2888: 2818: 2803: 2564: 2449: 2437: 2315: 2167: 1215: 797: 781: 621: 500: 433: 349: 244: 194: 122: 55: 1961: 1686: 1669: 948:"Macrolide Antibiotics Comparison: Erythromycin, Clarithromycin, Azithromycin" 777:
as it requires the synthesis of new enzyme molecules to restore the activity.
715:(used for lowering cholesterol) is not advisable and can lead to debilitating 580: – the first and so far only fluoroketolide (not yet approved) 3098: 3033: 2977: 2969: 2931: 2921: 2893: 2873: 2863: 2858: 2823: 2808: 2745: 2740: 2664: 2629: 2417: 1695: 1636: 1581: 694: 673: 577: 559: 548: 516: 438: 378: 334: 262: 236: 65: 1628: 848: 3017: 3013: 2941: 2878: 2848: 2813: 2783: 2619: 2594: 2579: 2569: 2559: 2533: 2474: 2422: 2369: 2342: 2332: 2185: 2118: 2061: 2026: 1969: 1895: 1816: 1775: 1744: 1703: 1654: 1589: 1542: 1483: 1385: 1350: 1307: 1264: 1223: 1177: 1117: 1086: 866: 793: 789: 785: 669: 594: 489: 454: 444: 424: 322: 248: 190: 182: 142: 51: 36: 1930: 1859: 1434: 1135: 1051: 933: 407:, macrolide therapy still produces substantial anti-inflammatory results. 3003: 2949: 2926: 2853: 2838: 2833: 2750: 2637: 2614: 2589: 2584: 2574: 2549: 2393: 2364: 1255: 1238: 751: 641: 606: 554: 480: 475: 240: 86: 1558:"Mechanism and diversity of the erythromycin esterase family of enzymes" 833:"apamycin: An InhibiTOR of Aging Emerges From the Soil of Easter Island" 605:
or immunomodulators, are also macrolides. They have similar activity to
2999: 2959: 2954: 2903: 2883: 2868: 2843: 2798: 2793: 2727: 2698: 2678: 2498: 2493: 2484: 2479: 2464: 2459: 2407: 2359: 2273: 1299: 1169: 968:
Giguere S, Prescott JF, Baggot JD, Walker RD, Dowling PM, eds. (2006).
811: 629: 590: 494: 465: 393: 370: 266: 258: 232: 186: 170: 106: 102: 98: 94: 79: 2150:
Tan MS, Gomez-Lumbreras A, Villa-Zapata L, Malone DC (December 2022).
1808: 1670:"Structural Basis for Kinase-Mediated Macrolide Antibiotic Resistance" 1573: 2828: 2788: 2708: 2703: 2693: 2688: 2683: 2514: 2469: 2432: 2427: 2398: 2388: 2378: 598: 526: 470: 450: 397: 166: 114: 90: 2149: 2913: 2383: 2354: 1735: 1718: 1100:
Bailly S, Pocidalo JJ, Fay M, Gougerot-Pocidalo MA (October 1991).
744: 716: 625: 537: 510: 345: 281: 150: 1795:
Sathasivam S, Lecky B (November 2008). "Statin induced myopathy".
1099: 2898: 1029: 912:
Klein JO (April 1997). "History of macrolide use in pediatrics".
773: 712: 664:-mediated or chromosomal, i.e., through mutation, and results in 661: 506: 154: 146: 82: 40: 32: 1668:
Fong DH, Burk DL, Blanchet J, Yan AY, Berghuis AM (2017-05-02).
660:
bacterial ribosomal RNA. This acquired resistance can be either
656:
to macrolides occurs by post-transcriptional methylation of the
61: 2995: 804: 765: 728: 711:
article highlights that the combination of some macrolides and
428: 382: 333:. Another potential mechanism is premature dissociation of the 162: 158: 2131: 1990: 810:
Macrolides, including azithromycin, should not be taken with
497: – approved in the EU, and in other countries 205:
Antibiotic macrolides are used to treat infections caused by
138: 134: 44: 1401:"Chemistry and biology of the polyene macrolide antibiotics" 830: 1946: 1872: 1602: 967: 381:(adjusting the immune response), with the added benefit of 340:
Macrolide antibiotics bind reversibly to the P site on the
2655: 2306: 1555: 341: 2225:"Antibacterial Agents; Structure Activity Relationships" 427: – unique; does not extensively inhibit 2206:
Macrolide antibiotics: chemistry, biology, and practice
1917:
Hautekeete ML (1995). "Hepatotoxicity of antibiotics".
1556:
Morar M, Pengelly K, Koteva K, Wright GD (2012-02-28).
1447: 889:
Macrolide Antibiotics: Chemistry, Biology, and Practice
551: – the first and only approved ketolide 441: – discontinued but was US FDA approved 356:, and thus are transported into the site of infection. 1760:"Diagnosis and Treatment of Streptococcal Pharyngitis" 1064: 1667: 1448:Kunze B, Sasse F, Wieczorek H, Huss M (July 2007). 157:rings are excluded, in order to differentiate from 2039: 683:Azithromycin has been used to treat strep throat ( 3096: 1201: 317:, and they are thought to do this by preventing 101:class of natural products. Some macrolides have 1794: 1716: 1609:Proceedings of the National Academy of Sciences 1398: 1280: 1278: 1276: 1274: 632:is another example of an antifungal macrolide. 1013: 1011: 352:. Macrolides are actively concentrated within 2258: 1320: 2143: 2076: 2033: 1314: 1271: 970:Antimicrobial Therapy in Veterinary Medicine 584: 321:from adding the growing peptide attached to 141:nitrogen (but should be differentiated from 1496: 1363: 1155: 1008: 503: – used in Italy and Turkey 364: 2726: 2265: 2251: 1916: 1837: 831:Arriola Apelo SI, Lamming DW (July 2016). 2175: 2108: 2016: 1734: 1685: 1644: 1532: 1473: 1424: 1254: 1243:The Journal of Antimicrobial Chemotherapy 1125: 856: 121:and is being investigated as a potential 2208:(2nd ed.). Boston: Academic Press. 2132:John R. Horn, Philip D. Hansten (2006). 2082: 1197: 1195: 1158:American Journal of Respiratory Medicine 914:The Pediatric Infectious Disease Journal 772:Macrolides have cyclic structure with a 750:Some macrolides are also known to cause 522:Not approved as a drug for medical use: 449: 415: 60: 50: 31: 1997:Cochrane Database of Systematic Reviews 1236: 14: 3097: 1151: 1149: 1147: 1145: 697:is another option for these patients. 291: 2246: 2203: 1942: 1940: 1757: 1499:"Mechanisms of Antibiotic Resistance" 1230: 1192: 1106:Antimicrobial Agents and Chemotherapy 1058: 911: 886: 685:Group A streptococcal (GAS) infection 325:to the next amino acid (similarly to 2222: 1717:Roland Leclercq (15 February 2002). 1515:10.1128/microbiolspec.VMBF-0016-2015 628:etc., are a subgroup of macrolides. 1142: 996:. Food and Drug Administration (US) 635: 612: 359: 181:The first macrolide discovered was 24: 2196: 1937: 1497:Munita JM, Arias CA (April 2016). 1044:10.1111/j.1432-1033.1987.tb10991.x 565: 513: – used in animals 348:. This action is considered to be 25: 3116: 2054:10.2174/1389200221666200817113920 972:(4th ed.). Wiley-Blackwell. 2101:10.1046/j.1365-2125.2000.00261.x 1919:Acta Gastro-Enterologica Belgica 1399:Hamilton-Miller JM (June 1973). 1032:European Journal of Biochemistry 926:10.1097/00006454-199704000-00025 891:(2nd ed.). Academic Press. 296: 2125: 1984: 1910: 1866: 1831: 1788: 1751: 1710: 1661: 1596: 1549: 1490: 1441: 1392: 1378:10.1016/j.clinthera.2005.08.009 1357: 1343:10.1016/j.phytochem.2007.09.018 1204:Current Opinion in Pharmacology 1093: 760: 700: 373:, Asian-prevalent lung disease 331:bacterial ribosomal translation 165:instead of lactones (as in the 2766:transpeptidation/translocation 2009:10.1002/14651858.CD011825.pub2 1950:European Journal of Pediatrics 1023: 986: 961: 940: 905: 880: 824: 676:(an MLS-resistant phenotype). 13: 1: 2230:. p. 143. Archived from 1888:10.1016/S0140-6736(99)10073-4 1475:10.1016/j.febslet.2007.06.069 1079:10.1016/S0022-2836(03)00662-4 837:J Gerontol A Biol Sci Med Sci 817: 647: 128: 2083:Westphal JF (October 2000). 1852:10.1016/0022-3468(76)90283-9 1840:Journal of Pediatric Surgery 1723:Clinical Infectious Diseases 1417:10.1128/br.37.3.166-196.1973 1288:Basic Clin Pharmacol Toxicol 1067:Journal of Molecular Biology 532: 303:protein synthesis inhibitors 39:. The macrolide ring is the 7: 410: 10: 3121: 2168:10.1007/s00296-022-05201-5 1216:10.1016/j.coph.2008.01.010 176: 85:ring to which one or more 3055: 3010:Quinupristin/dalfopristin 2968: 2940: 2912: 2774: 2763: 2717: 2663: 2654: 2628: 2542: 2527: 2507: 2446: 2329: 2314: 2305: 2278:inhibit protein synthesis 1962:10.1007/s00431-018-3287-7 1764:American Family Physician 1687:10.1016/j.str.2017.03.007 585:Non-antibiotic macrolides 573:Fluoroketolides include: 396:activity and obstructive 344:subunit of the bacterial 109:activity and are used as 27:Class of natural products 2529:Tetracycline antibiotics 1237:Schultz MJ (July 2004). 727:system, particularly of 375:diffuse panbronchiolitis 365:Diffuse panbronchiolitis 329:) as well as inhibiting 212:Streptococcus pneumoniae 1629:10.1073/pnas.2219827120 1405:Bacteriological Reviews 741:enterohepatic recycling 708:British Medical Journal 392:proliferation but also 200: 1118:10.1128/AAC.35.10.2016 690:Streptococcus pyogenes 458: 404:Pseudomonas aeruginosa 390:neutrophil granulocyte 254:Legionella pneumophila 228:Haemophilus influenzae 217:Gram-negative bacteria 207:Gram-positive bacteria 119:immunosuppressant drug 74:are a class of mostly 68: 58: 48: 1503:Microbiology Spectrum 1366:Clinical Therapeutics 887:Omura S, ed. (2002). 849:10.1093/gerona/glw090 739:. Macrolides exhibit 652:The primary means of 453: 416:Antibiotic macrolides 123:longevity therapeutic 64: 54: 35: 2719:Peptidyl transferase 735:, which can lead to 654:bacterial resistance 618:Polyene antimycotics 601:, which are used as 315:protein biosynthesis 222:Bordetella pertussis 111:pharmaceutical drugs 2348:Dihydrostreptomycin 2089:Br J Clin Pharmacol 1621:2023PNAS..12019827D 1466:2007FEBSL.581.3523K 1335:2008PChem..69..585R 737:torsades de pointes 544:Ketolides include: 485:midecamycin acetate 337:from the ribosome. 319:peptidyltransferase 307:mechanism of action 292:Mechanism of action 3082:Never to phase III 1615:(8): e2219827120. 1300:10.1111/bcpt.13343 1256:10.1093/jac/dkh309 1170:10.1007/BF03256601 603:immunosuppressants 459: 69: 59: 49: 3092: 3091: 3051: 3050: 3047: 3046: 2759: 2758: 2650: 2649: 2646: 2645: 2555:Chlortetracycline 2523: 2522: 2215:978-0-12-526451-8 2162:(12): 2253–2259. 1809:10.1136/bmj.a2286 1758:Choby BA (2009). 1680:(5): 750–761.e5. 1574:10.1021/bi201790u 1524:978-1-55581-927-9 979:978-0-8138-0656-3 898:978-0-12-526451-8 420:US FDA-approved: 309:of macrolides is 280:to be used on non 16:(Redirected from 3112: 2772: 2771: 2724: 2723: 2661: 2660: 2610:Rolitetracycline 2540: 2539: 2327: 2326: 2312: 2311: 2267: 2260: 2253: 2244: 2243: 2238: 2236: 2229: 2219: 2204:Ōmura S (2002). 2190: 2189: 2179: 2147: 2141: 2140: 2138: 2129: 2123: 2122: 2112: 2080: 2074: 2073: 2037: 2031: 2030: 2020: 1988: 1982: 1981: 1944: 1935: 1934: 1914: 1908: 1907: 1882:(9196): 2101–5. 1870: 1864: 1863: 1835: 1829: 1828: 1792: 1786: 1785: 1783: 1782: 1755: 1749: 1748: 1738: 1714: 1708: 1707: 1689: 1665: 1659: 1658: 1648: 1600: 1594: 1593: 1568:(8): 1740–1751. 1553: 1547: 1546: 1536: 1494: 1488: 1487: 1477: 1445: 1439: 1438: 1428: 1396: 1390: 1389: 1361: 1355: 1354: 1318: 1312: 1311: 1282: 1269: 1268: 1258: 1234: 1228: 1227: 1199: 1190: 1189: 1153: 1140: 1139: 1129: 1097: 1091: 1090: 1062: 1056: 1055: 1027: 1021: 1015: 1006: 1005: 1003: 1001: 990: 984: 983: 965: 959: 958: 956: 954: 944: 938: 937: 909: 903: 902: 884: 878: 877: 875: 873: 860: 828: 666:cross-resistance 636:Toxic macrolides 613:Antifungal drugs 379:immunomodulation 360:Immunomodulation 76:natural products 47:) at upper left. 21: 3120: 3119: 3115: 3114: 3113: 3111: 3110: 3109: 3095: 3094: 3093: 3088: 3087: 3072:Clinical trials 3043: 3029:Streptogramin B 3024:Streptogramin A 2964: 2936: 2908: 2755: 2736:Chloramphenicol 2713: 2667: 2642: 2624: 2605:Penimepicycline 2600:Oxytetracycline 2531: 2519: 2503: 2442: 2318: 2316:Aminoglycosides 2301: 2271: 2241: 2234: 2227: 2216: 2199: 2197:Further reading 2194: 2193: 2148: 2144: 2136: 2130: 2126: 2081: 2077: 2048:(12): 928–937. 2042:Curr Drug Metab 2038: 2034: 2003:(1): CD011825. 1989: 1985: 1945: 1938: 1915: 1911: 1871: 1867: 1836: 1832: 1793: 1789: 1780: 1778: 1756: 1752: 1715: 1711: 1666: 1662: 1601: 1597: 1554: 1550: 1525: 1495: 1491: 1446: 1442: 1397: 1393: 1362: 1358: 1319: 1315: 1283: 1272: 1235: 1231: 1200: 1193: 1154: 1143: 1098: 1094: 1063: 1059: 1028: 1024: 1016: 1009: 999: 997: 992: 991: 987: 980: 966: 962: 952: 950: 946: 945: 941: 910: 906: 899: 885: 881: 871: 869: 829: 825: 820: 763: 733:QT prolongation 725:cytochrome P450 703: 668:to macrolides, 650: 638: 615: 587: 568: 566:Fluoroketolides 535: 418: 413: 367: 362: 327:chloramphenicol 301:Macrolides are 299: 294: 276:Macrolides are 203: 179: 131: 28: 23: 22: 15: 12: 11: 5: 3118: 3108: 3107: 3090: 3089: 3086: 3085: 3084: 3083: 3080: 3069: 3063: 3057: 3056: 3053: 3052: 3049: 3048: 3045: 3044: 3042: 3041: 3031: 3026: 3021: 3007: 2993: 2974: 2972: 2970:Streptogramins 2966: 2965: 2963: 2962: 2957: 2952: 2946: 2944: 2938: 2937: 2935: 2934: 2929: 2924: 2918: 2916: 2910: 2909: 2907: 2906: 2901: 2896: 2891: 2889:Troleandomycin 2886: 2881: 2876: 2871: 2866: 2861: 2856: 2851: 2846: 2841: 2836: 2831: 2826: 2821: 2819:Flurithromycin 2816: 2811: 2806: 2804:Clarithromycin 2801: 2796: 2791: 2786: 2780: 2778: 2769: 2761: 2760: 2757: 2756: 2754: 2753: 2748: 2743: 2738: 2732: 2730: 2721: 2715: 2714: 2712: 2711: 2706: 2701: 2696: 2691: 2686: 2681: 2675: 2673: 2658: 2652: 2651: 2648: 2647: 2644: 2643: 2641: 2640: 2634: 2632: 2630:Glycylcyclines 2626: 2625: 2623: 2622: 2617: 2612: 2607: 2602: 2597: 2592: 2587: 2582: 2577: 2572: 2567: 2565:Demeclocycline 2562: 2557: 2552: 2546: 2544: 2537: 2525: 2524: 2521: 2520: 2518: 2517: 2511: 2509: 2505: 2504: 2502: 2501: 2496: 2490: 2489: 2488: 2487: 2482: 2477: 2472: 2467: 2456: 2454: 2450:Micromonospora 2444: 2443: 2441: 2440: 2438:Nourseothricin 2435: 2430: 2425: 2420: 2415: 2404: 2403: 2402: 2401: 2396: 2391: 2386: 2375: 2374: 2373: 2372: 2367: 2362: 2351: 2350: 2345: 2339: 2337: 2324: 2309: 2303: 2302: 2274:Antibacterials 2270: 2269: 2262: 2255: 2247: 2240: 2239: 2237:on 2006-03-04. 2220: 2214: 2200: 2198: 2195: 2192: 2191: 2142: 2124: 2075: 2032: 1983: 1956:(3): 301–314. 1936: 1925:(3–4): 290–6. 1909: 1865: 1830: 1787: 1770:(5): 383–390. 1750: 1736:10.1086/324626 1729:(4): 482–492. 1709: 1660: 1595: 1548: 1523: 1509:(2): 481–511. 1489: 1460:(18): 3523–7. 1440: 1391: 1372:(8): 1144–63. 1356: 1329:(3): 585–606. 1323:Phytochemistry 1313: 1294:(4): 307–317. 1270: 1229: 1191: 1141: 1112:(10): 2016–9. 1092: 1073:(5): 1005–14. 1057: 1022: 1007: 985: 978: 960: 939: 904: 897: 879: 822: 821: 819: 816: 798:clarithromycin 782:Clarithromycin 762: 759: 702: 699: 674:streptogramins 649: 646: 637: 634: 622:amphotericin B 614: 611: 586: 583: 582: 581: 567: 564: 563: 562: 557: 552: 534: 531: 530: 529: 520: 519: 514: 504: 501:Troleandomycin 498: 492: 487: 478: 473: 468: 448: 447: 442: 436: 434:Clarithromycin 431: 417: 414: 412: 409: 385:requirements. 366: 363: 361: 358: 350:bacteriostatic 298: 295: 293: 290: 215:) and limited 202: 199: 195:clarithromycin 178: 175: 130: 127: 56:Clarithromycin 26: 9: 6: 4: 3: 2: 3117: 3106: 3103: 3102: 3100: 3081: 3079: 3076: 3075: 3073: 3070: 3067: 3064: 3062: 3059: 3058: 3054: 3039: 3035: 3034:Virginiamycin 3032: 3030: 3027: 3025: 3022: 3019: 3015: 3011: 3008: 3005: 3001: 2997: 2994: 2991: 2987: 2983: 2979: 2978:Pristinamycin 2976: 2975: 2973: 2971: 2967: 2961: 2958: 2956: 2953: 2951: 2948: 2947: 2945: 2943: 2939: 2933: 2932:Solithromycin 2930: 2928: 2925: 2923: 2922:Telithromycin 2920: 2919: 2917: 2915: 2911: 2905: 2902: 2900: 2897: 2895: 2894:Tulathromycin 2892: 2890: 2887: 2885: 2882: 2880: 2877: 2875: 2874:Telithromycin 2872: 2870: 2867: 2865: 2864:Solithromycin 2862: 2860: 2859:Roxithromycin 2857: 2855: 2852: 2850: 2847: 2845: 2842: 2840: 2837: 2835: 2832: 2830: 2827: 2825: 2824:Gamithromycin 2822: 2820: 2817: 2815: 2812: 2810: 2809:Dirithromycin 2807: 2805: 2802: 2800: 2797: 2795: 2792: 2790: 2787: 2785: 2782: 2781: 2779: 2777: 2773: 2770: 2767: 2762: 2752: 2749: 2747: 2746:Thiamphenicol 2744: 2742: 2741:Azidamfenicol 2739: 2737: 2734: 2733: 2731: 2729: 2725: 2722: 2720: 2716: 2710: 2707: 2705: 2702: 2700: 2697: 2695: 2692: 2690: 2687: 2685: 2682: 2680: 2677: 2676: 2674: 2671: 2666: 2665:Oxazolidinone 2662: 2659: 2657: 2653: 2639: 2636: 2635: 2633: 2631: 2627: 2621: 2618: 2616: 2613: 2611: 2608: 2606: 2603: 2601: 2598: 2596: 2593: 2591: 2588: 2586: 2583: 2581: 2578: 2576: 2573: 2571: 2568: 2566: 2563: 2561: 2558: 2556: 2553: 2551: 2548: 2547: 2545: 2543:Tetracyclines 2541: 2538: 2535: 2530: 2526: 2516: 2513: 2512: 2510: 2506: 2500: 2497: 2495: 2492: 2491: 2486: 2483: 2481: 2478: 2476: 2473: 2471: 2468: 2466: 2463: 2462: 2461: 2458: 2457: 2455: 2452: 2451: 2445: 2439: 2436: 2434: 2431: 2429: 2426: 2424: 2421: 2419: 2418:Spectinomycin 2416: 2413: 2409: 2406: 2405: 2400: 2397: 2395: 2392: 2390: 2387: 2385: 2382: 2381: 2380: 2377: 2376: 2371: 2368: 2366: 2363: 2361: 2358: 2357: 2356: 2353: 2352: 2349: 2346: 2344: 2341: 2340: 2338: 2335: 2334: 2328: 2325: 2322: 2317: 2313: 2310: 2308: 2304: 2299: 2295: 2291: 2287: 2283: 2279: 2275: 2268: 2263: 2261: 2256: 2254: 2249: 2248: 2245: 2233: 2226: 2221: 2217: 2211: 2207: 2202: 2201: 2187: 2183: 2178: 2173: 2169: 2165: 2161: 2157: 2156:Rheumatol Int 2153: 2146: 2135: 2128: 2120: 2116: 2111: 2106: 2102: 2098: 2095:(4): 285–95. 2094: 2090: 2086: 2079: 2071: 2067: 2063: 2059: 2055: 2051: 2047: 2043: 2036: 2028: 2024: 2019: 2014: 2010: 2006: 2002: 1998: 1994: 1987: 1979: 1975: 1971: 1967: 1963: 1959: 1955: 1951: 1943: 1941: 1932: 1928: 1924: 1920: 1913: 1905: 1901: 1897: 1893: 1889: 1885: 1881: 1877: 1869: 1861: 1857: 1853: 1849: 1846:(2): 177–80. 1845: 1841: 1834: 1826: 1822: 1818: 1814: 1810: 1806: 1802: 1798: 1791: 1777: 1773: 1769: 1765: 1761: 1754: 1746: 1742: 1737: 1732: 1728: 1724: 1720: 1713: 1705: 1701: 1697: 1693: 1688: 1683: 1679: 1675: 1671: 1664: 1656: 1652: 1647: 1642: 1638: 1634: 1630: 1626: 1622: 1618: 1614: 1610: 1606: 1599: 1591: 1587: 1583: 1579: 1575: 1571: 1567: 1563: 1559: 1552: 1544: 1540: 1535: 1530: 1526: 1520: 1516: 1512: 1508: 1504: 1500: 1493: 1485: 1481: 1476: 1471: 1467: 1463: 1459: 1455: 1451: 1444: 1436: 1432: 1427: 1422: 1418: 1414: 1411:(2): 166–96. 1410: 1406: 1402: 1395: 1387: 1383: 1379: 1375: 1371: 1367: 1360: 1352: 1348: 1344: 1340: 1336: 1332: 1328: 1324: 1317: 1309: 1305: 1301: 1297: 1293: 1289: 1281: 1279: 1277: 1275: 1266: 1262: 1257: 1252: 1248: 1244: 1240: 1233: 1225: 1221: 1217: 1213: 1210:(3): 286–91. 1209: 1205: 1198: 1196: 1187: 1183: 1179: 1175: 1171: 1167: 1164:(2): 119–31. 1163: 1159: 1152: 1150: 1148: 1146: 1137: 1133: 1128: 1123: 1119: 1115: 1111: 1107: 1103: 1096: 1088: 1084: 1080: 1076: 1072: 1068: 1061: 1053: 1049: 1045: 1041: 1037: 1033: 1026: 1019: 1014: 1012: 995: 989: 981: 975: 971: 964: 949: 943: 935: 931: 927: 923: 920:(4): 427–31. 919: 915: 908: 900: 894: 890: 883: 868: 864: 859: 854: 850: 846: 842: 838: 834: 827: 823: 815: 813: 808: 806: 801: 799: 795: 791: 787: 783: 778: 775: 770: 767: 758: 755: 753: 748: 746: 742: 738: 734: 730: 726: 722: 718: 714: 710: 709: 698: 696: 695:Cephalosporin 692: 691: 686: 681: 677: 675: 671: 667: 663: 659: 655: 645: 643: 633: 631: 627: 623: 619: 610: 608: 604: 600: 596: 592: 579: 578:Solithromycin 576: 575: 574: 571: 561: 560:Solithromycin 558: 556: 553: 550: 549:Telithromycin 547: 546: 545: 542: 539: 528: 525: 524: 523: 518: 517:Roxithromycin 515: 512: 508: 505: 502: 499: 496: 493: 491: 488: 486: 482: 479: 477: 474: 472: 469: 467: 464: 463: 462: 456: 452: 446: 443: 440: 439:Dirithromycin 437: 435: 432: 430: 426: 423: 422: 421: 408: 406: 405: 399: 395: 391: 386: 384: 380: 376: 372: 357: 355: 351: 347: 343: 338: 336: 335:peptidyl-tRNA 332: 328: 324: 320: 316: 313:of bacterial 312: 308: 304: 297:Antibacterial 289: 286: 283: 279: 274: 272: 268: 264: 263:Mycobacterium 260: 256: 255: 250: 246: 245:staphylococci 242: 238: 234: 230: 229: 224: 223: 218: 214: 213: 208: 198: 196: 192: 188: 184: 174: 172: 168: 164: 160: 156: 152: 148: 144: 143:cyclopeptides 140: 136: 126: 124: 120: 116: 112: 108: 104: 100: 96: 92: 88: 84: 81: 78:with a large 77: 73: 67: 66:Roxithromycin 63: 57: 53: 46: 42: 38: 34: 30: 19: 3018:Quinupristin 3014:Dalfopristin 2942:Lincosamides 2879:Tildipirosin 2849:Oleandomycin 2814:Erythromycin 2784:Azithromycin 2775: 2620:Tetracycline 2595:Omadacycline 2580:Meclocycline 2570:Eravacycline 2560:Clomocycline 2475:Micronomicin 2448: 2423:Hygromycin B 2412:+loteprednol 2370:Ribostamycin 2343:Streptomycin 2333:Streptomyces 2331: 2232:the original 2223:Bryskier A. 2205: 2159: 2155: 2145: 2127: 2092: 2088: 2078: 2045: 2041: 2035: 2000: 1996: 1986: 1953: 1949: 1922: 1918: 1912: 1879: 1875: 1868: 1843: 1839: 1833: 1800: 1796: 1790: 1779:. Retrieved 1767: 1763: 1753: 1726: 1722: 1712: 1677: 1673: 1663: 1612: 1608: 1598: 1565: 1562:Biochemistry 1561: 1551: 1506: 1502: 1492: 1457: 1454:FEBS Letters 1453: 1443: 1408: 1404: 1394: 1369: 1365: 1359: 1326: 1322: 1316: 1291: 1287: 1246: 1242: 1232: 1207: 1203: 1161: 1157: 1109: 1105: 1095: 1070: 1066: 1060: 1035: 1031: 1025: 998:. Retrieved 988: 969: 963: 951:. Retrieved 942: 917: 913: 907: 888: 882: 870:. Retrieved 843:(7): 841–9. 840: 836: 826: 809: 802: 794:erythromycin 790:Azithromycin 786:erythromycin 779: 771: 764: 761:Interactions 756: 749: 706: 704: 701:Side-effects 688: 682: 678: 670:lincosamides 651: 642:mycolactones 639: 616: 595:pimecrolimus 588: 572: 569: 543: 536: 521: 490:Oleandomycin 466:Carbomycin A 460: 455:Azithromycin 445:Erythromycin 425:Azithromycin 419: 402: 387: 368: 339: 300: 287: 277: 275: 252: 237:streptococci 226: 220: 210: 204: 191:azithromycin 183:erythromycin 180: 132: 87:deoxy sugars 71: 70: 37:Erythromycin 29: 3068:from market 3004:Linopristin 2950:Clindamycin 2927:Cethromycin 2854:Rokitamycin 2839:Midecamycin 2834:Kitasamycin 2751:Florfenicol 2728:Amphenicols 2672:inhibitors) 2638:Tigecycline 2615:Sarecycline 2590:Minocycline 2585:Metacycline 2575:Lymecycline 2550:Doxycycline 2394:Bekanamycin 2365:Paromomycin 2323:inhibitors) 1249:(1): 21–8. 1038:(1): 53–8. 752:cholestasis 607:ciclosporin 555:Cethromycin 481:Midecamycin 476:Kitasamycin 249:enterococci 241:pneumococci 149:ring, or a 80:macrocyclic 3105:Macrolides 3000:Flopristin 2960:Pirlimycin 2955:Lincomycin 2904:Tylvalosin 2884:Tilmicosin 2869:Spiramycin 2844:Miocamycin 2799:Carrimycin 2794:Carbomycin 2776:Macrolides 2699:Ranbezolid 2679:Eperezolid 2670:initiation 2499:Astromicin 2494:Verdamicin 2485:Isepamicin 2480:Plazomicin 2465:Netilmicin 2460:Gentamicin 2408:Tobramycin 2360:Framycetin 2321:initiation 1781:2024-01-25 994:"DailyMed" 818:References 812:colchicine 721:inhibitors 687:caused by 648:Resistance 630:Cruentaren 620:, such as 591:tacrolimus 589:The drugs 495:Spiramycin 401:bacterium 398:secretions 394:lymphocyte 371:idiopathic 354:leukocytes 311:inhibition 267:Rickettsia 259:Mycoplasma 233:penicillin 187:penicillin 171:tacrolimus 137:nitrogen, 129:Definition 107:antifungal 103:antibiotic 99:polyketide 95:desosamine 89:, usually 72:Macrolides 18:Macrolides 3078:Phase III 3066:Withdrawn 2914:Ketolides 2829:Josamycin 2789:Boromycin 2709:Tedizolid 2704:Sutezolid 2694:Radezolid 2689:Posizolid 2684:Linezolid 2515:Butirosin 2470:Sisomicin 2433:Apramycin 2428:Totomycin 2399:Dibekacin 2389:Arbekacin 2379:Kanamycin 2070:221162650 1803:: a2286. 1696:1878-4186 1674:Structure 1637:0027-8424 1582:1520-4995 599:sirolimus 538:Ketolides 533:Ketolides 527:Boromycin 471:Josamycin 271:Chlamydia 167:ansamycin 115:Rapamycin 91:cladinose 3099:Category 2536:binding) 2447:-micin ( 2384:Amikacin 2355:Neomycin 2330:-mycin ( 2186:36104598 2119:11012550 2062:32807049 2027:30656650 1978:53711818 1970:30470884 1904:24160212 1896:10609814 1817:18988647 1776:19275067 1745:11797175 1704:28416110 1655:36791107 1590:22303981 1543:27227291 1484:17624334 1386:16199242 1351:17991498 1308:31628882 1265:15190022 1224:18339582 1178:14720066 1087:12860123 1000:22 March 953:22 March 867:27208895 745:duodenum 717:myopathy 626:nystatin 511:tylocine 457:capsules 411:Examples 383:low-dose 346:ribosome 282:ruminant 151:thiazole 43:(cyclic 2899:Tylosin 2177:9473467 2110:2015000 2018:6353052 1931:7491842 1860:1263054 1825:3239804 1646:9974460 1617:Bibcode 1534:4888801 1462:Bibcode 1435:4578757 1331:Bibcode 1186:7634677 1136:1759822 1052:3549307 934:9109154 872:17 July 858:4906330 805:statins 774:lactone 723:of the 713:statins 705:A 2008 662:plasmid 507:Tylosin 265:, some 219:(e.g., 209:(e.g., 177:History 163:lactams 161:. Also 159:tannins 155:Benzene 147:oxazole 83:lactone 41:lactone 3061:WHO-EM 2996:NXL103 2298:QJ01XQ 2212:  2184:  2174:  2117:  2107:  2068:  2060:  2025:  2015:  1976:  1968:  1929:  1902:  1894:  1876:Lancet 1858:  1823:  1815:  1774:  1743:  1702:  1694:  1653:  1643:  1635:  1588:  1580:  1541:  1531:  1521:  1482:  1433:  1426:413810 1423:  1384:  1349:  1306:  1263:  1222:  1184:  1176:  1134:  1127:245317 1124:  1085:  1050:  976:  932:  895:  865:  855:  766:CYP3A4 729:CYP3A4 672:, and 597:, and 429:CYP3A4 305:. The 269:, and 247:, and 153:ring. 145:), an 2764:MLS ( 2508:other 2276:that 2235:(PDF) 2228:(PDF) 2137:(PDF) 2066:S2CID 1974:S2CID 1900:S2CID 1821:S2CID 1182:S2CID 139:amide 135:amino 45:ester 2534:tRNA 2294:J01G 2290:J01F 2286:J01B 2282:J01A 2210:ISBN 2182:PMID 2115:PMID 2058:PMID 2023:PMID 1966:PMID 1927:PMID 1892:PMID 1856:PMID 1813:PMID 1772:PMID 1741:PMID 1700:PMID 1692:ISSN 1651:PMID 1633:ISSN 1586:PMID 1578:ISSN 1539:PMID 1519:ISBN 1480:PMID 1431:PMID 1382:PMID 1347:PMID 1304:PMID 1261:PMID 1220:PMID 1174:PMID 1132:PMID 1083:PMID 1048:PMID 1002:2017 974:ISBN 955:2017 930:PMID 893:ISBN 874:2022 863:PMID 796:and 784:and 323:tRNA 201:Uses 193:and 93:and 2990:IIB 2986:IIA 2656:50S 2307:30S 2172:PMC 2164:doi 2105:PMC 2097:doi 2050:doi 2013:PMC 2005:doi 1958:doi 1954:178 1884:doi 1880:354 1848:doi 1805:doi 1801:337 1797:BMJ 1731:doi 1682:doi 1641:PMC 1625:doi 1613:120 1570:doi 1529:PMC 1511:doi 1470:doi 1458:581 1421:PMC 1413:doi 1374:doi 1339:doi 1296:doi 1292:126 1251:doi 1212:doi 1166:doi 1122:PMC 1114:doi 1075:doi 1071:330 1040:doi 1036:164 922:doi 853:PMC 845:doi 658:23S 342:50S 278:not 105:or 3101:: 3074:: 3038:S1 3016:, 3002:, 2988:, 2984:, 2982:IA 2296:, 2292:, 2288:, 2284:, 2180:. 2170:. 2160:42 2158:. 2154:. 2113:. 2103:. 2093:50 2091:. 2087:. 2064:. 2056:. 2046:21 2044:. 2021:. 2011:. 1999:. 1995:. 1972:. 1964:. 1952:. 1939:^ 1923:58 1921:. 1898:. 1890:. 1878:. 1854:. 1844:11 1842:. 1819:. 1811:. 1799:. 1768:79 1766:. 1762:. 1739:. 1727:34 1725:. 1721:. 1698:. 1690:. 1678:25 1676:. 1672:. 1649:. 1639:. 1631:. 1623:. 1611:. 1607:. 1584:. 1576:. 1566:51 1564:. 1560:. 1537:. 1527:. 1517:. 1505:. 1501:. 1478:. 1468:. 1456:. 1452:. 1429:. 1419:. 1409:37 1407:. 1403:. 1380:. 1370:27 1368:. 1345:. 1337:. 1327:69 1325:. 1302:. 1290:. 1273:^ 1259:. 1247:54 1245:. 1241:. 1218:. 1206:. 1194:^ 1180:. 1172:. 1160:. 1144:^ 1130:. 1120:. 1110:35 1108:. 1104:. 1081:. 1069:. 1046:. 1034:. 1010:^ 928:. 918:16 916:. 861:. 851:. 841:71 839:. 835:. 644:. 624:, 609:. 593:, 273:. 261:, 257:, 243:, 239:, 225:, 173:. 125:. 113:. 3040:) 3036:( 3020:) 3012:( 3006:) 2998:( 2992:) 2980:( 2768:) 2668:( 2532:( 2453:) 2414:) 2410:( 2336:) 2319:( 2300:) 2280:( 2266:e 2259:t 2252:v 2218:. 2188:. 2166:: 2139:. 2121:. 2099:: 2072:. 2052:: 2029:. 2007:: 2001:1 1980:. 1960:: 1933:. 1906:. 1886:: 1862:. 1850:: 1827:. 1807:: 1784:. 1747:. 1733:: 1706:. 1684:: 1657:. 1627:: 1619:: 1592:. 1572:: 1545:. 1513:: 1507:4 1486:. 1472:: 1464:: 1437:. 1415:: 1388:. 1376:: 1353:. 1341:: 1333:: 1310:. 1298:: 1267:. 1253:: 1226:. 1214:: 1208:8 1188:. 1168:: 1162:1 1138:. 1116:: 1089:. 1077:: 1054:. 1042:: 1004:. 982:. 957:. 936:. 924:: 901:. 876:. 847:: 509:/ 483:/ 20:)

Index

Macrolides

Erythromycin
lactone
ester

Clarithromycin

Roxithromycin
natural products
macrocyclic
lactone
deoxy sugars
cladinose
desosamine
polyketide
antibiotic
antifungal
pharmaceutical drugs
Rapamycin
immunosuppressant drug
longevity therapeutic
amino
amide
cyclopeptides
oxazole
thiazole
Benzene
tannins
lactams

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.