Intervention: Omarigliptin
Trial phase: Phase 3
SMILES: CS(=O)(=O)n1cc2c(n1)CN([C@H]1CO[C@H](c3cc(F)ccc3F)[C@@H](N)C1)C2
Sex: All
Age groups: Adult | Older Adult
Healthy volunteers: No
Participants at risk: 2092
Group description: Omarigliptin (MK-3102) 25 mg capsule or tablet administered orally once weekly
Eligibility criteria:
Inclusion Criteria:

Diagnosed with type 2 diabetes mellitus

Is on one of the following diabetes treatment regimens that is stable for at least 12 weeks (except for pioglitazone for at least 16 weeks) and is within the associated A1C range for that treatment regimen:

A1C >= 6.5% and <= 10.0% (>=48 mmol/mol and <=86 mmol/mol) on: (a) diet or exercise alone (not on antihyperglycemic agent [AHA] for >= 12 weeks) OR (b) monotherapy with metformin (MF), pioglitazone (PIO) or an alpha-glucosidase inhibitor (AGI) or a sodium-glucose cotransporter inhibitor (SGLT2i) OR (c) dual combination therapy with MF, PIO, AGI or SGLT2i OR
A1C >= 7.0% and <=10.0% (>=53 mmol/mol and <=86 mmol/mol) on (a) monotherapy with a sulfonylurea or meglitinide OR (b) dual combination therapy with a sulfonylurea or a meglitinide and MF, PIO, AGI, or SGLT2i OR
A1C >=7.0% and <=10.0% (>=53 mmol/mol and <=86 mmol/mol) on one of the following insulin regimens (with or without metformin): (a) basal insulin (e.g.; insulin glargine, insulin detemir, NPH insulin, degludec) OR (b) prandial insulin (e.g. regular, aspart, lispro, glulisine) OR (c) basal/prandial insulin regimen consisting of multiple dose insulin injections of basal and prandial insulin or the use of pre-mixed insulin (e.g., Novolog 70/30®, Novolin 70/30®, Humalog 75/25®, or Humulin 70/30®
Pre-existing vascular disease (coronary artery disease, ischemic cerebrovascular disease, atherosclerotic peripheral artery disease)
(1) Male; (2) female not of reproductive potential; or (3) female of reproductive potential who agrees to remain abstinent or use alone or in conjunction with their partner 2 methods of contraception to prevent pregnancy during the study and for 21 days after the last dose of study drug.

Exclusion Criteria:

History of type 1 diabetes mellitus or a history of ketoacidosis
Treated with rosiglitazone, a dipeptidyl peptidase-IV (DPP-4) inhibitor, or a glucagon-like peptide-1 (GLP-1) receptor agonist within 12 weeks prior to study participation or previously treated with omarigliptin
On a weight loss program and is not in the maintenance phase or has been on a weight loss medication in the past 6 months or has undergone bariatric surgery within 12 months prior to study participation
Medical history of active liver disease (other than non-alcoholic hepatic steatosis), including chronic active hepatitis B or C, primary biliary cirrhosis, or symptomatic gallbladder disease
Human immunodeficiency virus (HIV) as assessed by medical history
New or worsening coronary heart disease, congestive heart failure, myocardial infarction, unstable angina, coronary artery intervention, stroke, or transient ischemic neurological disorder within the past 3 months
History of malignancy <=5 years prior to study participation, except for adequately treated basal cell or squamous cell skin cancer, or in situ cervical cancer
Clinically important hematological disorder (such as aplastic anemia, myeloproliferative or myelodysplastic syndromes, thrombocytopenia)
Pregnant or breast feeding, or is expecting to conceive or donate eggs during the trial, including 21 days following the last dose of study drug