Pregnant Women Taking Lamictal for Bipolar Disorder (PK-LAPB)

Tracking Information
First Submitted Date	November 15, 2013
First Posted Date	November 27, 2013
Last Update Posted Date	September 22, 2016
Study Start Date	September 2013
Estimated Primary Completion Date	September 2016 (Final data collection date for primary outcome measure)
Current Primary Outcome Measures; (submitted: April 1, 2015)	Change in Serum concentration/elimination [ Time Frame: An average of every 10 weeks; Hours 0, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24, or 0, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 13.5, 14.5, and 16 ]; For patients on 1x day dosing, serum levels will be obtained beginning at time 0 and at hours, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24 and L/D ratio will be determined at each time point. This series of serum levels will be completed an average of every 10 weeks across pregnancy, and postpartum. For patients on 2x dosing, serum levels will be obtained at hours 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 13.5, 14.5, and 16 hours.
Original Primary Outcome Measures; (submitted: November 21, 2013)	Serum L/D ratio change [ Time Frame: An average of every 10 weeks; Hours 0, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24 ]Serum levels will be obtained beginning at time 0 and at hours, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24 and L/D ratio will be determined at each time point. This series of serum levels will be completed an average of every 10 weeks across pregnancy, and postpartum.; Area Under the Concentration Curve (AUC 0-24h) [ Time Frame: An average of every 10 weeks; Hours 0, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24 ]Serum levels will be obtained beginning at time 0 and at hours, 1, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 12, 16, 20, 24 and L/D ratio will be determined at each time point. This series of serum levels will be completed an average of every 10 weeks across pregnancy, and postpartum.
Change History	Complete list of historical versions of study NCT01996293 on ClinicalTrials.gov Archive Site
Current Secondary Outcome Measures; (submitted: November 21, 2013)	Infant (umbilical cord)/Maternal ratio of LTG [ Time Frame: 30 min ]Ratio of umbilical cord (infant) LTG serum level to maternal LTG serum level will be determined at delivery.; Scores on depression assessment, Inventory of Depression Symptomatology- Self Report (IDS-SR) [ Time Frame: Participants will complete these assessments an average of every 10 weeks from the time they enter the study, up to 12 weeks postpartum. ]To determine if there is a pattern of increasing scores on self-report depression assessment (IDS-SR) and declining L/D ratios. Increasing scores indicate worsening symptoms or depression episode recurrence.; Scores on mania assessment, Young Mania Reporting Scale (YMRS) [ Time Frame: Participants will complete these assessments an average of every 10 weeks from the time they enter the study, up to 12 weeks postpartum. ]To determine if there is a pattern of increasing scores on clinician administered mania assessment (YMRS) and declining L/D ratios.; Scores on anxiety scale, Generalized Anxiety Disorder (GAD-7) [ Time Frame: Participants will complete these assessments an average of every 10 weeks from the time they enter the study, up to 12 weeks postpartum. ]
Original Secondary Outcome Measures	Same as current
Current Other Outcome Measures; (submitted: November 21, 2013)	Percent increase in estradiol levels and their correlation to percent decrease in LTG L/D ratio [ Time Frame: Estradiol levels will be examined an average of every 10 weeks from the time the participant enters the study, up to 12 weeks postpartum. ]
Original Other Outcome Measures	Same as current
Descriptive Information
Brief Title	Pregnant Women Taking Lamictal for Bipolar Disorder
Official Title	Pharmacokinetics of Lamotrigine in Pregnant and Postpartum Women With Bipolar Disorder
Brief Summary	This study seeks to examine how the dose of lamotrigine (Lamictal) should be adjusted during pregnancy for women with Bipolar Disorder. The investigators predict that the concentration of Lamictal in women's blood will decrease during pregnancy, and increase after postpartum. Because the concentration of the medication is likely to decrease during pregnancy, it is important for doctors to know how much they should increase a patient's dose in order to prevent worsening of Bipolar symptoms. In this study, the investigators will ask that participants complete up to five overnight visits to our clinical research unit where their blood will be drawn every couple of hours, through an IV catheter, to measure how the concentration of lamotrigine (Lamictal) changes over time. Participants will be compensated for their time.
Detailed Description	There is an increased risk of recurrence of Bipolar Disorder (BD) episodes or worsening symptoms in pregnancy after the discontinuation of mood stabilizers. Similarly, changes in medication concentration due to the physiological changes in pregnancy may effectively reduce the medication dose and thus its efficacy in pregnancy. Therapeutic dose monitoring has proven to have great utility in preventing seizure recurrence in women with epilepsy (WWE), specifically, dose monitoring of lamotrigine (LTG). Similar guidelines to that of women with epilepsy would benefit pregnant women with BD who are taking lamotrigine (LTG) in pregnancy. However, the pharmacokinetics as well as the utility of therapeutic dose monitoring of LTG in pregnant patients with Bipolar Disorder has not been well studied. This study is an observational protocol to explore the longitudinal pharmacokinetics (PK) of LTG during pregnancy and postpartum in 10 women with Bipolar Disorder. The correlation between changes in bioavailability and level-to-dose (L/D) ratios and increases in symptoms of depression, mania and anxiety and recurrence of syndromal BD episodes that fulfill Diagnostic and Statistics Manual of Mental Disorders (IV) (DSM4) criteria will be investigated. The primary aims of this study are 1.) To assess the impact of the dynamic physiology of pregnancy on the L/D ratio and bioavailability of LTG in women with BD. 2.) To evaluate the correlations between maternal and umbilical cord LTG serum levels. 3.) To explore the relationship between declining LTG L/D ratios during pregnancy, bioavailability and the increase in psychiatric symptoms and recurrence of syndromal BD. 4.) To explore the relationship between declining LTG L/D ratios during pregnancy, bioavailability and the recurrence of anxiety symptoms. Additionally this study will evaluate correlations between estradiol levels and change in LTG L/D ratios during pregnancy. To optimize the research yield from this investigation, participants will have the option to allow banking of cerebrospinal (CSF) fluid and DNA for future analyses.
Study Type	Observational
Study Design	Observational Model: Case-Only; Time Perspective: Prospective
Target Follow-Up Duration	Not Provided
Biospecimen	Retention: Samples With DNA; Description: Blood serum specimen will be obtained to measure lamotrigine and estradiol levels. Standard of care labs will be obtained on every participant that is eligible and signs informed consent. Participants will not have more than 50 ml of blood drawn every 8 weeks. Participants will also have the option to have blood drawn for DNA banking. Participants in the study that elect to receive analgesia for pain related to labor and have a spinal-epidural at Northwestern University will have CSF stored and banked for future analysis.
Sampling Method	Non-Probability Sample
Study Population	Participants will be recruited broadly from Northwestern clinical services including Internal Medicine, OB/GYN, Family Medicine, and Psychiatry, registries, and from the local Chicagoland community. Patients that sign consent, complete the evaluation and meet criteria for Bipolar Disorder, any subtype, will be enrolled into the study.
Condition	Bipolar Disorder
Intervention	Drug: lamotrigine; Lamotrigine will be observed in women who have already under the guidance of a physician decide to continue lamotrigine for the treatment of Bipolar Disorder; Other Name: Lamictal, Lamiktal, Labileno, Triazines
Study Groups/Cohorts	Lamotrigine for Bipolar; antepartum and peripartum women taking lamotrigine for Bipolar Disorder; Intervention: Drug: lamotrigine
Publications *	Clark CT, Klein AM, Perel JM, Helsel J, Wisner KL. Lamotrigine dosing for pregnant patients with bipolar disorder. Am J Psychiatry. 2013 Nov;170(11):1240-7. doi: 10.1176/appi.ajp.2013.13010006.
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status	Unknown status
Estimated Enrollment; (submitted: November 21, 2013)	10
Original Estimated Enrollment	Same as current
Estimated Study Completion Date	September 2017
Estimated Primary Completion Date	September 2016 (Final data collection date for primary outcome measure)
Eligibility Criteria	Inclusion Criteria: Age 18 or older; If Pregnant, equal to or less than 26 weeks; English-speaking; DSM-IV Bipolar Disorder, any subtype; Able to provide informed consent; Daily dosing of Lamictal Exclusion Criteria: Active substance abuse within last 6 months and/or positive urine drug screen; Active suicidality; No obstetrical care; Antiepileptic drugs that affect metabolism of LTG; Medications in FDA categories F or X that are not antimanic drugs; Liver or kidney disease
Sex/Gender	Sexes Eligible for Study: Female
Ages	18 Years to 45 Years (Adult)
Accepts Healthy Volunteers	No
Contacts	Contact information is only displayed when the study is recruiting subjects
Listed Location Countries	United States
Removed Location Countries
Administrative Information
NCT Number	NCT01996293
Other Study ID Numbers	00079810
Has Data Monitoring Committee	No
U.S. FDA-regulated Product	Not Provided
IPD Sharing Statement	Plan to Share IPD: Undecided
Responsible Party	Crystal Clark, Northwestern University
Study Sponsor	Northwestern University
Collaborators	Not Provided
Investigators	Principal Investigator: Crystal T Clark, MD, MSc Assistant Professor
PRS Account	Northwestern University
Verification Date	September 2016