Please assess the completion status of the following clinical trial:

Trial Title: Effect of Acetazolamide on Visuo-motor Learning in Lowlanders Older Than 40 Years at Altitude

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

Eligibility Criteria:
Inclusion Criteria:~* Healthy men and women, age 40-75 yrs, without any disease and need of medication.~* Born, raised and currently living at low altitude (\<800m).~* Written informed consent.~* Kyrgyz ethnicity~Exclusion Criteria:~* Any active respiratory, cardiovascular or other disease requiring regular treatment or being otherwise relevant for tolerance of hypoxia or altitude exposure.~* Any condition that may interfere with protocol compliance including current heavy smoking (\>20 cigarettes per day or \>20 pack-years with active smoking during the last 10 years), regular use of alcohol.~* Allergy to acetazolamide and other sulfonamides.

- Gender: ALL
- Minimum Age: 40 Years
- Maximum Age: 75 Years
- Healthy Volunteers: t

Study Arms:
- ACETAZOLAMIDE oral capsule (Type: ACTIVE_COMPARATOR): Acetazolamide 375mg/day (capsule @125 mg: 1 in the morning, 2 in the evening), orally. Medication starts 24 hours before ascent to 3'100m until the morning after the second night at 3'100m
- PLACEBO oral capsule (Type: PLACEBO_COMPARATOR): Placebo (capsules identically looking as acetazolamide capsules: 1 in the morning, 2 in the evening), orally. Medication starts 24 hours before ascent to 3'100m until the morning after the second night at 3'100m

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