Please assess the completion status of the following clinical trial:

Trial Title: The Effects of Reducing Stomach Acid on Post-tonsillectomy Pain

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

Eligibility Criteria:
Inclusion Criteria:~* All healthy children ages 5-18 years scheduled for tonsillectomy and /or adenotonsillectomy for sleep disturbance secondary to airway obstruction at Children's Hospital Boston~Exclusion Criteria:~* Patients on any medications other than the study drug (Lansoprazole or placebo), Amoxicillin®, and acetaminophen with or without codeine~* An underlying medical condition which would necessitate an alteration in the anesthetic regimen~* Patients allergic to any of the medications in the protocol~* History of chronic tonsillitis~* History of chronic pain conditions~* History of active gastro-esophageal reflux disease~* Surgery in addition to tonsillectomy/adenotonsillectomy (except for myringotomy)~* Cognitive/developmental disorders~* Inability to use a self-report pain scale

- Gender: ALL
- Minimum Age: 5 Years
- Maximum Age: 18 Years
- Healthy Volunteers: t

Study Arms:
- 1 (Type: EXPERIMENTAL): Post-operative administration of Lansoprazole
- 2 (Type: PLACEBO_COMPARATOR): Placebo

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