Please assess the completion status of the following clinical trial:

Trial Title: Medications for Obstructive Sleep Apnea In Children With Down Syndrome

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Male or female participants between 6 to 17 years of age, inclusive, at the Screening Visit. Enrollment will be stratified to ensure equal representation of children age 6-12 and age 13-17. No more than 14 subjects will be randomized for each age group.~2. Known diagnosis of Down syndrome (trisomy 21, but not translocation or mosaicism)~Exclusion Criteria:~1. Hypoxemia independent of respiratory events on polysomnography (≥5 minutes with oxygen saturation \<90%)~2. Presence of central sleep apnea on polysomnography (central AHI ≥ 5)~3. Currently using and adherent to PAP therapy (\>4 hours per night for 70% of nights in the past 30 days based on device download or parent report)~4. MAO inhibitor use~5. Urinary retention~6. Prematurity \< 37 weeks estimated gestational age~7. Seizure disorder~8. Untreated or inadequately treated hypothyroidism~9. Significant traumatic brain injury~10. Congenital heart disease and not cleared to participate by the patient's cardiologist~11. History of current, untreated depression~12. History of liver disease~13. 3+ or greater tonsillar hypertrophy.

- Gender: ALL
- Minimum Age: 6 Years
- Maximum Age: 17 Years
- Healthy Volunteers: f

Study Arms:
- High dose ato-oxy (Type: ACTIVE_COMPARATOR): None
- Low dose ato-oxy (Type: ACTIVE_COMPARATOR): None

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