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Clinical Pharmacokinetics of Lamivudine

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Abstract

Lamivudine (3TC), the negative enantiomer of 2′-deoxy-3′-thiacytidine, is a dideoxynucleoside analogue used in combination with other agents in the treatment of human immunodeficiency virus type 1 (HIV-1) infection and as monotherapy in the treatment of hepatitis B virus (HBV) infection. Lamivudine undergoes anabolic phosphorylation by intracellular kinases to form lamivudine 5′-triphosphate, the active anabolite which prevents HIV-1 and HBV replication by competitively inhibiting viral reverse transcriptase and terminating proviral DNA chain extension.

The pharmacokinetics of lamivudine are similar in patients with HIV-1 or HBV infection, and healthy volunteers. The drug is rapidly absorbed after oral administration, with maximum serum concentrations usually attained 0.5 to 1.5 hours after the dose. The absolute bioavailability is approximately 82 and 68% in adults and children, respectively. Lamivudine systemic exposure, as measured by the area under the serum drug concentration-time curve (AUC), is not altered when it is administered with food.

Lamivudine is widely distributed into total body fluid, the mean apparent volume of distribution (Vd) being approximately 1.3 L/kg following intravenous administration. In pregnant women, lamivudine concentrations in maternal serum, amniotic fluid, umbilical cord and neonatal serum are comparable, indicating that the drug diffuses freely across the placenta. In postpartum women lamivudine is secreted into breast milk. The concentration of lamivudine in cerebrospinal fluid (CSF) is low to modest, being 4 to 8% of serum concentrations in adults and 9 to 17% of serum concentrations in children measured at 2 to 4 hours after the dose.

In patients with normal renal function, about 5% of the parent compound is metabolised to the trans-sulphoxide metabolite, which is pharmacologically inactive. In patients with renal impairment, the amount of trans-sulphoxide metabolite recovered in the urine increases, presumably as a function of the decreased lamivudine elimination. As approximately 70% of an oral dose is eliminated renally as unchanged drug, the dose needs to be reduced in patients with renal insufficiency. Hepatic impairment does not affect the pharmacokinetics of lamivudine. Systemic clearance following single intravenous doses averages 20 to 25 L/h (approximately 0.3 L/h/kg). The dominant elimination half-life of lamivudine is approximately 5 to 7 hours, and the in vitro intracellular half-life of its active 5′-triphosphate anabolite is 10.5 to 15.5 hours and 17 to 19 hours in HIV-1 and HBV cell lines, respectively.

Drug interaction studies have shown that trimethoprim increases the AUC and decreases the renal clearance of lamivudine, although lamivudine does not affect the disposition of trimethoprim. Other studies have demonstrated no significant interaction between lamivudine and zidovudine or between lamivudine and iterferon-α-2b. There is limited potential for drug-druginteractions with compounds that are metabolised and/or highly proteinbound.

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References

  1. Soudeyns H, Yao XJ, Gao Q, et al. Anti-human immunodeficiency virus type I activity and in vitro toxicity of 2′-deoxy-3′-thiacytidine (BCH-189), a novel heterocyclic nucleoside analog. Antimicrob Agents Chemother 1991; 35: 1386–90.

    Article  PubMed  CAS  Google Scholar 

  2. Coates JA, Cammack N, Jenkinson HJ, et al. The separated enantiomers of 2′-deoxy-3′-thiacytidine(BCH-189)bothin-hibit human immunodeficiency virus replication in vitro. Antimicrob Agents Chemother 1992; 36: 202–5.

    Article  PubMed  CAS  Google Scholar 

  3. Skalski V, Chang CN, Dutschman G, et al. The biochemical basis for the differential anti-human immunodeficiency virus activity of two cis enantiomers of 2′,3′-dideoxy-3′-thiacytidine. J Biol Chem 1993; 268: 23234–8.

    PubMed  CAS  Google Scholar 

  4. Cammack N, Rouse P, Marr CLP, et al. Cellular metabolism of (−)-enantomeric 2′-deoxy-3′-thiacytidine. Biochem Pharmacol 1992 May 28; 43 (10): 2059–64.

    Article  PubMed  CAS  Google Scholar 

  5. Moore KHP. Pharmacokinetics (PK) of lamivudine (3TC) phosphorylation on periopheral blood mammalian cells (PBMC) from HIV-infected patients [abstract]. 12th International Conference on AIDS; 1998 Jun 28–Jul 3: Geneva.

  6. Coates JA, Cammack N, Jenkinson HJ, et al. (−)-2′-Deoxy-3′-thiacytidine is a potent, highly selective inhibitor of human immunodeficiency virus type 1 and type 2 replication in vitro. Antimicrob Agents Chemother 1992: 36: 733–9.

    Article  PubMed  CAS  Google Scholar 

  7. Furman PA, Davis M, Liotta DC, et al. The anti-hepatitis B virus activities, cytotoxicities and anabolic profiles of the (−) and (+) enantiomers of cis-5-fluoro-l-[2-(hydroxymethyl)-l,3-oxanthiolan-5-yl] cytosine. Antimicrob Agents Chemother 1992; 36: 2686–92.

    Article  PubMed  CAS  Google Scholar 

  8. Chang C-N, Doong S-L, Zhou JH, et al. Deoxycytidine deaminase-resistant stereoisomer is the active form of (−)-2′3′-dideoxy-3′-thiacytidine in the inhibition of hepatitis B virus replication. J Biol Chem 1992; 267: 13938–42.

    PubMed  CAS  Google Scholar 

  9. Larder BA, Kemp SD, Harrigan PR. Potential mechanism for sustained antiretroviral efficacy of AZT-3TC combination therapy. Science 1995; 269: 696–9.

    Article  PubMed  CAS  Google Scholar 

  10. Tisdale M, Kemp SD, Parry NR, et al. Rapid in vitro selection of human immunodeficiency virus type 1 resistant to 3′-thiacytidine inhibitors due to a mutation in the YMDD region of reverse transcriptase. Proc Natl Acad Sci USA 1993 Jun 15; 90: 5653–6.

    Article  PubMed  CAS  Google Scholar 

  11. Kuritzkes DR, Quinn JB, Benoit SL, et al. Drug resistance and virologic response in NUCA 3001, a randomized trial of lamivudine (3TC) versus zidovudine (ZDV) versus ZDV plus 3TC in previously untreated patients. AIDS 1996; 10: 975–81.

    Article  PubMed  CAS  Google Scholar 

  12. Johnson VA, Quinn JB, Benoit SL, et al. Drug resistance and viral load in NUCA 3002: lamivudine (3TC) (high or low dose)/zidovudine (ZDV) combination therapy versus ZDV/dideoxycytidine (ddC) combination therapy in ZDV-experienced (24 weeks) patients (CD4 cells 100—300/mm3) [abstract 321]. In: Programs and Abstracts of the 3rd Conference on Retroviruses and Opportunistic Infections; Infectious Diseases Society of America; 1996 Jan 28–Feb 1: Washington, DC. Alexandria, VA: Infectious Diseases Society of America for the Foundation for Retrovirology and Human Health, 1996: 113.

    Google Scholar 

  13. Boyer PL, Hughes SH. Analysis of mutations at position 184 in reverse transcriptase of human immunodeficiency virus type 1. Antimicrob Agents Chemother 1995; 39: 1624–8.

    Article  PubMed  CAS  Google Scholar 

  14. Wainberg MA. Increased fidelity of drug-selected M184V mutated HIV-1 reverse transcriptase as the basis for the effectiveness of 3TC in HIV clinical trials. Leukemia 1997; 11 Suppl. 3): 85–8.

    PubMed  Google Scholar 

  15. Swartz MN. Mitochondrial toxicity — new adverse drug effects. N Engl J Med 1995; 333: 1146–8.

    Article  PubMed  CAS  Google Scholar 

  16. Hart GJ, Orr DC, Penn CR, et al. Effects of (−)-2′-deoxy-3′-thiacytidine (3TC) 5′-triphosphate on human immunodeficiency virus reverse transcriptase and mammalian DNA polymerases α, β, and γ. Antimicrob Agents Chemother 1992; 36: 1688–94.

    Article  PubMed  CAS  Google Scholar 

  17. Perry CM, Faulds D. Lamivudine: a review of its antiviral activity, pharmacokinetic properties and therapeutic efficacy in the management of HIV infection. Drugs 1997; 53 (4): 657–80.

    Article  PubMed  CAS  Google Scholar 

  18. Sommadossi JP, Schinazi RF, Chu CK, Xie MY. Comparison of cytotoxicity of the (−)- and (+)-enantiomer of 2′,3′-dideoxy-3′-thiacytidine in normal human bone marrow progenitor cells. Biochem Pharmacol 1992; 44: 1921–5.

    Article  PubMed  CAS  Google Scholar 

  19. Eron JJ, Benoit SL, Jemsek J, et al. Treatment with lamivudine, zidovudine, or both in HIV-positive patients with 200–500 CD4+ cells per cubic millimeter. N Engl J Med 1995 Dec 21; 333 (25): 1662–9.

    Article  PubMed  CAS  Google Scholar 

  20. Bartlett JA, Benoit SL, Johnson VA, et al. Lamivudine plus zidovudine compared with zalcitabine plus zidovudine in patients with HIV infection. Ann Intern Med 1996 Aug 1; 125 (3): 161–72.

    PubMed  CAS  Google Scholar 

  21. Katlama C, Ingrand D, Loveday C, et al. Safety and efficacy of lamivudine-zidovudine combination therapy in antiretroviralnaive patients: a randomized controlled comparison with zidovudine monotherapy. JAMA 1996 Jul 10; 276 (2): 118–25.

    Article  PubMed  CAS  Google Scholar 

  22. Staszewski S, Loveday C, Picazo JJ, et al. Safety and efficacy of lamivudine-zidovudine combination therapy in zidovud-ine-experienced patients: a randomized controlled comparison with zidovudine monotherapy. JAMA 1996 Jul 10; 276 (2): 111–7.

    Article  PubMed  CAS  Google Scholar 

  23. Carpenter CCJ, Fischl MA, Hammer SM, et al. Antiretroviral therapy for HIV infection in 1997: updated recommendations of the International AIDS Society — US A Panel. JAMA 1997 Jun 25; 277 (24): 1962–9.

    Article  PubMed  CAS  Google Scholar 

  24. CAESAR Coordinating Committee. Randomised trial of addition of lamivudine or lamivudine plus loviride to zidovudine-containing regimens for patients with HIV-1 infection: the CAESAR trial. Lancet 1997 May 17; 349: 1413–21.

    Article  Google Scholar 

  25. Saag M, Knowles M, Chang Y, et al. Durable effect of VIRACEPT (nelfinavir mesylate, NEV) in triple combination therapy [abstract I-101]. In: Program and Abstracts of the 37th Interscience Conference of Antimicrobial Agents and Chemotherapy; American Society of Microbiology; 1997 Sep 28–Oct 1: Toronto. Washington, DC: American Society of Microbiology, 1997: 261–2.

    Google Scholar 

  26. Hammer SM, Squires KE, Hughes MD, et al. A controlled trial of two nucleoside analogues plus indinavir in persons with human immunodeficiency virus infection and CD4 cell counts of 200 per cubic millimeter or less. N Engl J Med 1997; 337: 725–33.

    Article  PubMed  CAS  Google Scholar 

  27. Gulick RM, Mellors JW, Havlir D, et al. Treatment with indinavir, zidovudine, and lamivudine in adults with human immunodeficiency virus infection and prior antiretroviral therapy. N Engl J Med 1997; 337: 734–9.

    Article  PubMed  CAS  Google Scholar 

  28. Eron J, Yetzer E, Poertz D, et al. Combivir™, a fixed dose formulation of lamivudine (3TC) 150 mg and zidovudine (ZDV) 300 mg, given BID plus a protease inhibitor (PI) compared to 3TC 150 mg BID and ZDV 200 mg TID plus a PI [abstract no. 387c]. In: Programs and Abstracts of the 5th Conference on Retroviruses and Opportunistic Infections; Infectious Diseases Society of America; 1998 Feb 1–5: Chicago. Alexandria (VA): Foundation for Retrovirology and Human Health, 1998: 151.

    Google Scholar 

  29. Rozenbaum W, Chauveau E. Phase 3 study of the antiviral activity of AZT and 3TC given as separate regimens versus a new fixed dose combination (Combivir™) [abstract no. 669]. In: Programs and Abstracts of the 5th Conference on Retroviruses and Opportunistic Infections; Infectious Diseases Society of America; 1998 Feb 1–5: Chicago. Alexandria (VA): Foundation for Retrovirology and Human Health, 1998: 205.

    Google Scholar 

  30. Delta Coordinating Committee. Delta: a randomised doubleblind controlled trial comparing combinations of zidovudine plus didanosine or zalcitabine with zidovudine alone in HTV-infected individuals. Lancet 1996; 348: 283–91.

    Article  Google Scholar 

  31. Hammer SM, Katzenstein DA, Hughes MD, et al. A trial comparing nucleoside monotherapy with combination therapy in HIV-infected adults with CD4 cell counts from 200 to 500 per cubic millimeter. N Engl J Med 1996; 335 (15): 1081–90.

    Article  PubMed  CAS  Google Scholar 

  32. Al Faraidy K, Yoshida EM, Davis JE, et al. Alteration of the dismal natural history of fibrosing choleostatic hepatitis secondary to hepatitis B virus with the use of lamivudine. Transplantation 1997; 64 (6): 926–8.

    Article  PubMed  Google Scholar 

  33. Deinstag JL, Perrillo RP, Schiff ER, et al. A preliminary trial of lamivudine for chronic hepatitis B infection. N Engl J Med 1995 Dec 21; 333 (25): 1657–61.

    Article  Google Scholar 

  34. Lai C-L, Ching C-K, Tung AK-M, et al. Lamivudine is effective in suppressing hepatitis B virus DNA in Chinese hepatitis B surface antigen carriers: a placebo-controlled trial. Hepatology 1997 Jan; 25 (1): 241–4.

    Article  PubMed  CAS  Google Scholar 

  35. Nevens F, Main J, Hoonkoop P, et al. Lamivudine therapy for chronic hepatitis B — a six-month randomized dose-ranging study. Gastroenterology 1997 Oct; 113 (4): 1258–63.

    Article  PubMed  CAS  Google Scholar 

  36. Vanthiel DH, Friedlander L, Kania RJ, et al. Lamivudine treatment of advanced and decompensated liver disease due to hepatitis B. Hepatogastroenterology 1997; 44 (15): 808–12.

    CAS  Google Scholar 

  37. Bartholomew MM, Jansen RW, Jeffers LJ, et al. Hepatitis-B-virus resistance to lamivudine given for recurrent infection after orthotopic liver transplantation. Lancet 1997; 349: 20–2.

    Article  PubMed  CAS  Google Scholar 

  38. Allen MI, Deslauriers M, Andrews CW, et al. Identification and characterization of mutations in hepatitis B virus resistant to lamivudine. Hepatology 1998; 27 (6): 1670–7.

    Article  PubMed  CAS  Google Scholar 

  39. Hussey EK, Donn KH, Daniel MJ, et al. Interspecies scaling and pharmacokinetic parameters of 3TC in humans. J Clin Pharmacol 1994 Oct; 34: 975–7.

    Google Scholar 

  40. van Leeuwen R, Lange JMA, Hussey EK, et al. The safety and pharmacokinetics of a reverse transcriptase inhibitor, 3TC, in patients with HIV infection: a phase I study. AIDS 1992 Dec; 6: 1417–25.

    Google Scholar 

  41. Yuen GJ, Morris DM, Mydlow PK, et al. Pharmacokinetics, absolute bioavailability, and absorption characteristics of lamivudine. J Clin Pharmacol 1995 Dec; 35: 1174–80.

    Google Scholar 

  42. Johnson MA, Verpooten GA, Daniel MJ, et al. Single-dose pharmacokinetics of lamivudine in subjects with impaired renal function and effect of haemodialysis. Br J Clin Pharmacol 1998; 46: 21–7.

    Article  PubMed  CAS  Google Scholar 

  43. Data on file. Glaxo Wellcome Incorporated.

  44. Moore KHP, Lloyd PP, Duncan B, et al. Bioequivalence of Combivir™ tablet and Epivir® plus Retrovir tablets [abstract no. 671]. In: Programs and Abstracts of the 5th Conference on Retroviruses and Opportunistic Infections; Infectious Diseases Society of America; 1998 Feb 1–5: Chicago. Alexandria (VA): Foundation for Retrovirology and Human Health, 1998: 205.

    Google Scholar 

  45. Moore KH, Yuen GJ, Raasch RH, et al. Pharmacokinetics of lamivudine administered alone and with trimethoprim-sulfamethoxazole. Clin Pharmacol Ther 1996 May; 59 (5): 550–8.

    Article  PubMed  CAS  Google Scholar 

  46. Angel JB, Hussey EK, Hall ST, et al. Pharmacokinetics of 3TC (GR109714X) administered with and without food to HIV-infected patients. Drug Invest 1993 Aug; 6: 70–4.

    Google Scholar 

  47. Heald AE, Hsyu PH, Yuen GJ, et al. Pharmacokinetics of lamivudine in human immunodeficiency virus-infected patients with renal dysfunction. Antimicrob Agents Chemother 1996; 40 (6): 1514–8.

    PubMed  CAS  Google Scholar 

  48. Johnson MA, Horak J, Breuel PB. The pharmacokinetics of lamivudine in patients with impaired hepatic function. Eur J Clin Pharmacol 1998; 54: 363–6.

    Article  PubMed  CAS  Google Scholar 

  49. Harker AJ, Evans GL, Hawley AE, Morris DM. High-performance liquid Chromatographic assay for (−)-2′-deoxy- 3′-thiacytidine in human serum. J ChromatogrB:Biomed Appl 1994 Jul 1; 657 (1): 227–32.

    Article  CAS  Google Scholar 

  50. Morris DM, Selinger K. Determination of 2′-deoxy-3′-thiacyti-dine (3TC) in human urine by liquid chromatography: direct injection with column switching. J Pharm Biomed Anal 1994; 12 (2):255–64.

    Article  PubMed  CAS  Google Scholar 

  51. Moore KHP, Yuen GJ, Hussey EK. Analysis of potential gender differences in lamivudine (3TC) disposition using population pharmacokinetics from two Phase III clinical trials in HIV-infected patients [abstract 1298]. In: Abstract Book of the National Conference on Women and HIV; National Conference on Women and HIV; 1997 May 4–7: Los Angeles.

    Google Scholar 

  52. Pluda JM, Cooley TP, Montaner JSG, et al. A phase I/II study of 2′-deoxy- 3′- thiacytidine (lamivudine) in patients with advanced human immunodeficiency virus infection. J Infect Dis 1995; 171 (6): 1438–47.

    Article  PubMed  CAS  Google Scholar 

  53. Lewis LL, Venzon D, Church J, et al. Lamivudine in children with immunodeficiency virus infection: a phase I/II study. J Infect Dis 1996; 174 (1): 16–25.

    Article  PubMed  CAS  Google Scholar 

  54. Johnson MA, Goodwin C, Yuen GJ, et al. The pharnacokinetics of 3TC administered to HIV-1 infected women (pre-partum, during labour and post-partum) and their offspring [abstract no. Tu.C.445]. In: Program and Abstracts of the 11th International Conference on AIDS; International AIDS Society; 1996 Jul 7–12: Vancouver: International AIDS Society, 1996: 249–50.

    Google Scholar 

  55. Dudley MN, Graham K, Kaul S, et al. Pharmacokinetics of stavudine in patients with AIDS or AIDS-related complex. J Infect Dis 1992; 166: 480–5.

    Article  PubMed  CAS  Google Scholar 

  56. Dudley MN. Clinical pharmacokinetics of nucleoside antiretroviral agents. J Infect Dis 1995; 171: Suppl. 2: S99–112.

    Article  PubMed  Google Scholar 

  57. van Leeuwen R, Katlama C, Kitchen V, et al. Evaluation of safety and efficacy of 3TC (lamivudine) in patients with asymptomatic or mildly symptomatic human immunodeficiency virus infection: a phase I/II study. J Infect Dis 1995 May; 171: 1166–71.

    Google Scholar 

  58. Blaney SM, Daniel MJ, Harker AJ, et al. Phannacokinetics of lamivudine and BCH-189 in plasma and cerebrospinal fluid of non-human primates. Antimicrob Agents Chemother 1995 Dec; 39 (12): 2779–82.

    Article  PubMed  CAS  Google Scholar 

  59. Moodley J, Moodley D, Pillay K, et al. Pharmacokinetics and antiretroviral activity of lamividine alone or when co-administered with zidovudine in HIV-infected pregnant women and their offspring. J Infect Dis 1998; 178: 1327–33.

    Article  PubMed  CAS  Google Scholar 

  60. Horton CM, Yuen G, Mikolich DM, et al. Phannacokinetics of oral lamivudine administered alone and with oral zidovudine (ZDV) in asymptomatic patients with human immunodeficiency virus (HIV) infection [abstract no. PIII-64]. Clin Pharmacol Ther 1994 Feb; 55 (2): 198.

    Google Scholar 

  61. Kewn S, Veal GJ, Hoogard PG, et al. Lamivudine (3TC) phosphorylation and drug interactions in vitro. Biochem Pharmacol 1997; 54: 589–95.

    Article  PubMed  CAS  Google Scholar 

  62. Gao WY, Agbaria R, Driscoll JS, et al. Divergent anti-human immunodeficiency virus activity and anabolic phosphorylation of 2′,3′-dideoxynucleoside analogs in resting and activated human cells. J Biol Chem 1994; 269 (17): 12633–8.

    PubMed  CAS  Google Scholar 

  63. Johnson MA, Mutimer D, Ahmed M, et al. Phannacokinetics of lamivudine in chronic hepatitis B virus-infected patients undergoing liver transplantation [abstract no. A-47]. In: Program and Abstracts of the 37th Interscience Conference on Antimicrobial Agents and Chemotherapy; American Society of Microbiology; 1997 Sep 28–Oct 1: Toronto. Washington, DC: American Society of Microbiology, 1997: 9.

    Google Scholar 

  64. Sweeney KR, Hsyu P-H, Statkevich P, et al. Renal disposition and drug interaction screening of (−)-2′-deoxy-3′-thiacytidine (3TC) in the isolated perfused rat kidney. Phannaceut Res 1995 Dec; 12 (12): 1958–63.

    Article  CAS  Google Scholar 

  65. Rana KZ, Horton CM, Yuen GJ, et al. Effect of lamivudine on zidovudine phannacokinetics in asymptomatic HIV-infected individuals [abstract no. A62]. In: Program and abstracts of the 34th Interscience Conference on Antimicrobial Agents and Chemotherapy; American Society of Microbiology; 1994 Oct 4–7; Orlando (FL). Washington, DC: American Society of Microbiology, 1994: 83.

    Google Scholar 

  66. Symonds WT, McDowell J, Chittick G, et al. The safety and phannacokinetics of GW1592U89, zidovudine and lamivudine (3TC) alone and in combination after single-dose administration in HIV-infected patients [abstract]. AIDS 1996; 10 Suppl. 2: S23.

    Google Scholar 

  67. Mutimer D, Naoumov N, Honkoop P, et al. Combination alphainterferon and lamivudine therapy for alpha-interferon—resistant chronic hepatitis B infection: results of a pilot study. J Hepatol 1998; 28: 923–9.

    Article  PubMed  CAS  Google Scholar 

  68. Veal GJ, Hoggard PG, Barry MG, et al. Interaction between lamivudine (3TC) and other nucleoside analogues for intra-cellular phosphorylation. AIDS 1996 May; 10 (5): 546–8.

    Article  PubMed  CAS  Google Scholar 

  69. Tyrell DLJ, Mitchell MC, De Man RA, et al. Phase II trial of lamivudine for chronic hepatitis B. Hepatology 1993; 18: 112(A).

    Article  Google Scholar 

  70. Lai CL, Chien RN, Leung NWY, et al. A one year trial of lamivudine for chronic hepatitis B. N Engl J Med 1998: 339 (2); 61–8.

    Article  PubMed  CAS  Google Scholar 

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Johnson, M.A., Moore, K.H.P., Yuen, G.J. et al. Clinical Pharmacokinetics of Lamivudine. Clin Pharmacokinet 36, 41–66 (1999). https://doi.org/10.2165/00003088-199936010-00004

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