Please assess the completion status of the following clinical trial:

Trial Title: A Trial of N-Acetylcysteine (an Over-the-Counter Medicine) in Adolescents Who Smoke Marijuana

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

Eligibility Criteria:
Inclusion Criteria:~* Age 13-21 years~* Regular Marijuana smoker meeting DSM-IV criteria for cannabis dependence and seeking marijuana cessation treatment~Exclusion Criteria:~* Allergy or intolerance to NAC~* Pregnancy or lactation~* Use of carbamazepine or nitroglycerine (or any other drug deemed to be hazardous if taken with NAC) within 14 days of study participation~* Current enrollment in treatment for cannabis dependence~* Current substance dependence, other than cannabis or nicotine~* Significant medical or psychiatric illness that may place the participant at increased risk in the judgement of the study physician

- Gender: ALL
- Minimum Age: 13 Years
- Maximum Age: 21 Years
- Healthy Volunteers: f

Study Arms:
- N-Acetylcysteine (Type: ACTIVE_COMPARATOR): None
- Placebo (Type: PLACEBO_COMPARATOR): None

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