Please assess the completion status of the following clinical trial:

Trial Title: Analgetic and Anxiolytic Effect of Preoperative Pregabalin

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Clinical diagnosis of disc prolapse~* Age 18+~* ASA (American Association in Anesthesiology) I-III~* written consent~Exclusion Criteria:~* Age \< 18~* ASA \> III~* liver failure~* renal failure~* allergic reaction against gabapentin and/or pregabalin~* pregnancy

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

Study Arms:
- Pregabalin (Type: ACTIVE_COMPARATOR): 150 mg Pregabalin per orally about one hour before surgery
- Placebo (Type: PLACEBO_COMPARATOR): One capsule of saccharose (placebo) was administered orally about one hour before surgery.

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