Lamotrigine and Oral Contraceptives

NCT ID: NCT00266149

Last Updated: 2008-04-24

Basic Information

• Recruitment Status: TERMINATED
• Clinical Phase: PHASE3
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2003-06-30
• Study Completion Date: 2005-05-31

Brief Summary

The present study evaluates the effect of oral contraceptives on lamotrigine plasma concentrations in a double blind, placebo controlled, cross-over study in patients with epilepsy.

Detailed Description

Lamotrigine is widely used as an antiepileptic drug in the treatment of newly onset as well as refractory epilepsy (1;2). Lamotrigine is unique among the antiepileptic drug since the major route (76%) of elimination is conjugation with glucuronic acid (glucuronidation) (3). This conjugation reaction is catalyzed by the uridine 5'-diphosphate (UDP)-glucuronosyltransferases (UGTs); of which the isoform UGT1A4 probably is the major route of metabolism in humans (3). The pathway is inhibited by valproate and induced by other anticonvulsants (3), and explains the effect of these drugs on lamotrgine metabolism (4). Other drugs that are metabolized via direct glucoronidation may interfere with the metabolism of lamotrigine e.g. acetaminophen (5). Estrogeneous substrates are metabolized via glucuronidation (6-8) and may potentially interact with the metabolism of lamotrigine. In the development of lamotrigine for use in epilepsy patients the effect on the oral contraceptive pill was studied. In contrast to other commonly used antiepileptic drugs e.g. carbamazepine and phenytoin(9), lamotrigine did not significantly influence the constituents of the oral contraceptive pill (10-12). In addition, it was initially assumed from population pharmacokinetic studies, that oral contraceptives did not influence the metabolism of lamotrigine (13).However, recent retrospective studies indicate that oral contraceptives may increase the metabolism of lamotrigine resulting in a significant decrease in plasma concentration of lamotrigine when given with oral contraceptives (14;15). This effect is probably related to the ethinyl estradiol content of the combined contracetive pill and no the progesterone content (16).

To confirm and further extend these findings, the present study evaluates the effect of oral contraceptives on lamotrigine plasma concentrations in a double blind, placebo controlled, cross-over study in patients with epilepsy.

Reference List

1. French JA, Kanner AM, Bautista J, Abou-Khalil B, Browne T, Harden CL et al. Efficacy and Tolerability of the New Antiepileptic Drugs, II: Treatment of Refractory Epilepsy: Report of the TTA and QSS Subcommittees of the American Academy of Neurology and the American Epilepsy Society. Epilepsia 2004; 45(5):410-423.

2. French JA, Kanner AM, Bautista J, Abou-Khalil B, Browne T, Harden CL et al. Efficacy and Tolerability of the New Antiepileptic Drugs, I: Treatment of New-Onset Epilepsy: Report of the TTA and QSS Subcommittees of the American Academy of Neurology and the American Epilepsy Society. Epilepsia 2004; 45(5):401-409.

3. Dickins M, Chen C. Lamotrigine. Chemistry, Biotransformation and Pharmacokinetics. In: Levy RH, Mattson RH, Meldrum BS, Perucca E, editors. Antiepileptic Drugs. Philidelphia: Lippincott, Williams & Wilkins, 2002: 370-379.

4. Patsalos PN, Perucca E. Clinically important drug interactions in epilepsy: general features and interactions between antiepileptic drugs. Lancet Neurol 2003; 2(6):347-356.

5. Depot M, Powell JR, Messenheimer JAJ, Cloutier G, Dalton MJ. Kinetic effects of multiple oral doses of acetaminophen on a single oral dose of lamotrigine. Clin Pharmacol Ther 1990; 48(4):346-355.

6. Tephly TR, Green MD. UDP-Glucuronosyltransferases. In: Levy RH, Thummel KE, Trager W, Hansten PD, Eichelbaum M, editors. Metabolic Drug Interactions. Philidelphia: Lippincott, Williams & Wilkins, 2000: 161-174.

7. Shipkova M, Wieland E. Glucuronidation in therapeutic drug monitoring. Clin Chim Acta 2005; 358(1-2):2-23.

8. Ebner T, Remmel RP, Burchell B. Human bilirubin UDP-glucuronosyltransferase catalyzes the glucuronidation of ethinylestradiol. Mol Pharmacol 1993; 43(4):649-654.

9. Patsalos PN, Perucca E. Clinically important drug interactions in epilepsy: interactions between antiepileptic drugs and other drugs. Lancet Neurol 2003; 2(8):473-481.

10. Crawford P. Interactions between antiepileptic drugs and hormonal contraception. CNS Drugs 2002 ;16 (4 ):263 -72 2002; 16(4):263-272.

11. Doose DR, Wang SS, Padmanabhan M, Schwabe S, Jacobs D, Bialer M. Effect of topiramate or carbamazepine on the pharmacokinetics of an oral contraceptive containing norethindrone and ethinyl estradiol in healthy obese and nonobese female subjects. Epilepsia 2003 Apr ;44 (4 ):540 -9 44(4):540-549.

12. Holdish T, Whiteman P, Orme M, Back D, Ward S. Effect of lamotrigine on the pharmacology of the combined oral contraceptive pill. Epilepsia 32[suppl. 1], s96. 1991.

13. Hussein Z, Posner J. Population pharmacokinetics of lamotrigine monotherapy in patients with epilepsy: retrospective analysis of routine monitoring data. Br J Clin Pharmacol 1997; 43(5):457-465.

14. Sabers A, Ohman I, Christensen J, Tomson T. Oral contraceptives reduce lamotrigine plasma levels. Neurology 2003 Aug 26 ;61 (4 ):570 -1 2003; 61(4):570-571.

15. Sabers A, Buchholt JM, ULDALL P, Hansen EL. Lamotrigine plasma levels reduced by oral contraceptives. Epilepsy Res 2001 Nov ;47 (1 -2 ):151 -4 47(1-2):151-154.

16. Reimers A, Helde G, Brodtkorb E. Ethinyl estradiol, not progestogens, reduces lamotrigine serum concentrations. Epilepsia 2005; 46(9):1414-1417.

Conditions

Epilepsy

Keywords

Pharmacokinetics; Lamotrigine; Oral Contraceptives; UGT; Glucuronidation.

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Interventions

Oral contraception

Intervention Type: DRUG

Lamotrigine

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

Women with epilepsy, treated with lamotrigine in monotherapy and taking combination type oral contraceptives, and who were between 18 and 40 years of age, were candidates for inclusion in the study. Patients should agree to use contraception of barrier type throughout the study (see study design).

Exclusion Criteria

Patients were not admitted to the study if any of the following criteria were present: (1) pregnancy, (2) breastfeeding, (3) affected liver function, (4) affected kidney function, (5) daily intake of drugs with known or suspected influence on the metabolism of lamotrigine (acetaminophen and sertralin).

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

University of Aarhus

OTHER

Sponsor Role: lead

Principal Investigators

Jakob Christensen, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Department of Neurology, Aarhus University Hospital, 8000 Aarhus C

Locations

Department of Neurology, Aarhus University Hospital

Aarhus, Aarhus, Denmark

Countries

Denmark

References

French JA, Kanner AM, Bautista J, Abou-Khalil B, Browne T, Harden CL, Theodore WH, Bazil C, Stern J, Schachter SC, Bergen D, Hirtz D, Montouris GD, Nespeca M, Gidal B, Marks WJ Jr, Turk WR, Fischer JH, Bourgeois B, Wilner A, Faught RE Jr, Sachdeo RC, Beydoun A, Glauser TA; American Academy of Neurology Therapeutics and Technology Assessment Subcommittee; American Academy of Neurology Quality Standards Subcommittee; American Epilepsy Society Therapeutics and Technology Assessment Subcommittee; American Epilepsy Society Quality Standards Subcommittee. Efficacy and tolerability of the new antiepileptic drugs, II: Treatment of refractory epilepsy: report of the TTA and QSS Subcommittees of the American Academy of Neurology and the American Epilepsy Society. Epilepsia. 2004 May;45(5):410-23. doi: 10.1111/j.0013-9580.2004.06304.x.

Reference Type: BACKGROUND

PMID: 15101822 (View on PubMed)

French JA, Kanner AM, Bautista J, Abou-Khalil B, Browne T, Harden CL, Theodore WH, Bazil C, Stern J, Schachter SC, Bergen D, Hirtz D, Montouris GD, Nespeca M, Gidal B, Marks WJ Jr, Turk WR, Fischer JH, Bourgeois B, Wilner A, Faught RE Jr, Sachdeo RC, Beydoun A, Glauser TA; American Academy of Neurology Therapeutics and Technology Assessment Subcommittee; American Academy of Neurology Quality Standards Subcommittee; American Epilepsy Society Quality Standards Subcommittee; American Epilepsy Society Therapeutics and Technology Assessment Subcommittee. Efficacy and tolerability of the new antiepileptic drugs, I: Treatment of new-onset epilepsy: report of the TTA and QSS Subcommittees of the American Academy of Neurology and the American Epilepsy Society. Epilepsia. 2004 May;45(5):401-9. doi: 10.1111/j.0013-9580.2004.06204.x.

Reference Type: BACKGROUND

PMID: 15101821 (View on PubMed)

Patsalos PN, Perucca E. Clinically important drug interactions in epilepsy: general features and interactions between antiepileptic drugs. Lancet Neurol. 2003 Jun;2(6):347-56. doi: 10.1016/s1474-4422(03)00409-5.

Reference Type: BACKGROUND

PMID: 12849151 (View on PubMed)

Depot M, Powell JR, Messenheimer JA Jr, Cloutier G, Dalton MJ. Kinetic effects of multiple oral doses of acetaminophen on a single oral dose of lamotrigine. Clin Pharmacol Ther. 1990 Oct;48(4):346-55. doi: 10.1038/clpt.1990.162.

Reference Type: BACKGROUND

PMID: 2225696 (View on PubMed)

Shipkova M, Wieland E. Glucuronidation in therapeutic drug monitoring. Clin Chim Acta. 2005 Aug;358(1-2):2-23. doi: 10.1016/j.cccn.2005.02.023.

Reference Type: BACKGROUND

PMID: 15893300 (View on PubMed)

Related Links

http://www.dkma.dk

Danish Medicines Agency

Other Identifiers

EK:j. nr. 20030009

Identifier Type: -

Identifier Source: secondary_id

LMS: j.nr. 2612-2188

Identifier Type: -

Identifier Source: org_study_id