Please assess the completion status of the following clinical trial:

Trial Title: A Study To Investigate The Antidepressant Effect Of Lamotrigine In Patients With Bipolar Disorder Using Lithium

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: None

Eligibility Criteria:
Inclusion criteria:~* Patients with bipolar disorder (type I or type II) currently suffering from depression that is at least moderate in severity according to a psychiatrist.~* Currently using lithium.~* Female subjects can't be pregnant or become pregnant during the study.~Exclusion criteria:~* Actively suicidal.~* Rapid cyclers.~* Suffering from significant personality disorders.~* Alcohol or substance dependent or abusive.~* Suffering from significant physical conditions.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Based on this trial design, predict the completion outcome and termination type (if applicable).