Please assess the completion status of the following clinical trial:

Trial Title: Study of Methylnaltrexone (MNTX) for the Relief of Constipation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* 18 years of age and older~* Negative pregnancy test (serum or urine) at screening for all women of childbearing potential~* Advanced Medical Illness (i.e., terminal illness, such as incurable cancer or end of stage AIDS) with life expectancy of ≥ 1 month~* patient must sign ICF~Exclusion Criteria:~* Women who are pregnant and/or nursing~* Previous treatment with MNTX~* Participation in any other studies involving investigational products within 30 days prior to screening

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

Study Arms:
- Arm 1 (Type: EXPERIMENTAL): None
- Arm 2 (Type: PLACEBO_COMPARATOR): None

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