Please assess the completion status of the following clinical trial:

Trial Title: A Dose Determination Study of Chinese Herbal Medicine for Functional Constipation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE2
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Clinical diagnosis of functional constipation with Rome II criteria~* General stool type belongs to Type 1 to 4 according to Bristol Stool Form Scale~* Complete spontaneous bowel movement≦2 movements per week~Exclusion Criteria:~* Anti-diarrhoeal therapy~* Drug-induced constipation~* Medical history of important bowel pathology, such as inflammatory bowel disease, congenital or acquired megacolon / megarectum~* Medical history of previous abdominal surgery~* Taking chronic medications that contain any kind of herbs, mineral, or specific vitamin supplements~* Medical history of carbohydrate malabsorption, hormonal disorder, cancer, diabetes mellitus, hypothyroidism, asthma, renal impairment and/or any other serious diseases~* History of laxative abuse~* History of allergy to Chinese herbal medicine~* Psychiatric or addictive disorders~* Pregnancy or breast-feeding~* Any other serious diseases

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- MaZiRenWan (MZRW) Low dose (Type: EXPERIMENTAL): MaZiRenWan (MZRW) Low dose 2.5g sachet by mouth, twice daily for 8 weeks
- MaZiRenWan (MZRW) Median dose (Type: EXPERIMENTAL): MaZiRenWan (MZRW) Median dose 5.0g sachet by mouth, twice daily for 8 weeks
- MaZiRenWan (MZRW) High dose (Type: EXPERIMENTAL): MaZiRenWan (MZRW) High dose 7.5g sachet by mouth, twice daily for 8 weeks

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