Please assess the completion status of the following clinical trial:

Trial Title: Tadalafil and Acetazolamide Versus Acetazolamide in Acute Mountain Sickness Prevention

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

Eligibility Criteria:
Inclusion Criteria:~* Participant in trekking to high altitude~* Agreement to sign the informed consent.~Exclusion Criteria:~* No agreement to sign informed consent.

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

Study Arms:
- Acetazolamide (Type: ACTIVE_COMPARATOR): acetazolamide 125 mg BID
- Acetazolamide and Tadalafil (Type: EXPERIMENTAL): Intervention arm

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