Please assess the completion status of the following clinical trial:

Trial Title: Effect of Gefapixant (AF-219/MK-7264) on Cough Reflex Sensitivity (MK-7264-015)

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

Eligibility Criteria:
Inclusion Criteria:~* Have provided written informed voluntary consent;~* Be able to speak, read, and understand English;~* Be males or females, of any race, between 18 and 80 years of age, inclusive;~* Have a body mass index (BMI) ≥18 and \<35.0 kg/m2;~* Be in good general health with no clinically relevant abnormalities based on the medical history, physical examination, clinical laboratory evaluations (hematology, clinical chemistry, and urinalysis), and 12 lead electrocardiogram;~* Women of child bearing potential must have a negative pregnancy test at Screening and prior to randomization.~* Women of child-bearing potential must use 2 methods of acceptable birth control from Screening until 3 months after the last dose of study drug;~* Male subjects with partners of child-bearing potential (as defined in Inclusion No. 8) must use 2 methods of acceptable birth control, 1 of which must be a barrier method;~* Subjects with chronic cough~* Be able to communicate effectively with the Investigator and other study center personnel and agree to comply with the study procedures and restrictions~Exclusion Criteria:~* Current smoker;~* Individuals who have given up smoking within the past 6 months, or those with \>20 pack-year smoking history(chronic cough subjects), or \>10 pack-year smoking history (healthy subjects);~* History of upper respiratory tract infection or recent significant change in pulmonary status within 4 weeks prior to Screening or prior to randomization;~* History of concurrent malignancy or recurrence of malignancy within 2 years prior to Screening (with the exception of \< 3 excised basal cell carcinomas);~* History of a diagnosis of drug or alcohol dependency or abuse within the last 3 years;~* In the opinion of the Principal Investigator, an uncontrolled or unstable clinically significant neurological, psychiatric, respiratory, cardiovascular, peripheral vascular, gastrointestinal, hepatic, pancreatic, endocrinological, hematological, or immunological disorder or an active infection;~* Clinically significant abnormal electrocardiogram (ECG) at Screening~* Significantly abnormal laboratory tests at Screening~* Breastfeeding;~* In the judgement of the Principal Investigator, other severe, acute, or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with trial participation or investigational product administration or may interfere with the interpretation of trial results and would make the subject inappropriate for entry into this trial.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- Gefapixant 50 mg (Type: EXPERIMENTAL): Gefapixant 50 mg (1 tablet) administered as a single dose
- Gefapixant 300 mg (Type: EXPERIMENTAL): Gefapixant 300 mg (6 tablets) administered as a single dose
- Placebo (Type: PLACEBO_COMPARATOR): Placebo-matching tablets administered as a single dose

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

Answer: outcome: complete