| Diabetes Mellitus, Non-Insulin-Dependent
Mounjaro vs Janumet XR
Side-by-side clinical, coverage, and cost comparison for diabetes mellitus, non-insulin-dependent.Deep comparison between: Mounjaro vs Janumet with Prescriber.AI
AI compares prescribing info and payer-specific access barriers across 1,200+ formularies. Here's a preview of what prescribers are already asking.Safety signalsJanumet has a higher rate of injection site reactions vs Mounjaro based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Janumet but not Mounjaro, including UnitedHealthcare
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Category
Mounjaro
Janumet
At A Glance
SC injection
Once weekly
GIP/GLP-1 receptor agonist
Oral
Once daily
DPP-4 inhibitor / biguanide
Indications
- Diabetes Mellitus, Non-Insulin-Dependent
- Diabetes Mellitus, Non-Insulin-Dependent
Dosing
Diabetes Mellitus, Non-Insulin-Dependent Start at 2.5 mg SC once weekly; increase to 5 mg after 4 weeks; escalate in 2.5 mg increments every >=4 weeks as needed; max 15 mg once weekly in adults and 10 mg once weekly in pediatric patients 10 years of age and older.
Diabetes Mellitus, Non-Insulin-Dependent Take once daily with a meal; recommended starting dose is 100 mg sitagliptin and 1000 mg metformin HCl extended-release once daily; maximum daily dose is 100 mg sitagliptin and 2000 mg metformin HCl; dose of sitagliptin component limited to 50 mg once daily if eGFR falls below 45 mL/min/1.73 m2; do not split, crush, or chew tablets.
Contraindications
- Personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)
- Known serious hypersensitivity to tirzepatide or any excipient in MOUNJARO
- Severe renal impairment (eGFR below 30 mL/min/1.73 m2)
- Acute or chronic metabolic acidosis, including diabetic ketoacidosis
- History of a serious hypersensitivity reaction to JANUMET XR, sitagliptin, or metformin, such as anaphylaxis or angioedema
Adverse Reactions
Most common (>=5%) Nausea, diarrhea, decreased appetite, vomiting, constipation, dyspepsia, abdominal pain
Serious Risk of thyroid C-cell tumors, acute pancreatitis, hypoglycemia (with insulin secretagogues or insulin), hypersensitivity reactions, acute kidney injury due to volume depletion, severe gastrointestinal adverse reactions, diabetic retinopathy complications, acute gallbladder disease, pulmonary aspiration
Postmarketing Anaphylaxis, angioedema, acute pancreatitis, hemorrhagic and necrotizing pancreatitis, ileus, intestinal obstruction, severe constipation including fecal impaction, pulmonary aspiration, acute renal failure or worsening of chronic renal failure, alopecia
Most common (>=5%) Diarrhea, upper respiratory tract infection, headache (from sitagliptin and metformin coadministration studies); nasopharyngitis (sitagliptin monotherapy); hypoglycemia, diarrhea, nausea (extended-release metformin added to glyburide)
Serious Lactic acidosis, pancreatitis, heart failure, acute renal failure, vitamin B12 deficiency, hypoglycemia with insulin or insulin secretagogues, hypersensitivity reactions, severe and disabling arthralgia, bullous pemphigoid
Postmarketing Anaphylaxis, angioedema, rash, urticaria, cutaneous vasculitis, Stevens-Johnson syndrome, hepatic enzyme elevations, fatal and non-fatal hemorrhagic and necrotizing pancreatitis, worsening renal function including acute renal failure, tubulointerstitial nephritis, severe and disabling arthralgia, bullous pemphigoid, constipation, vomiting, myalgia, rhabdomyolysis, cholestatic and hepatocellular liver injury
Pharmacology
Tirzepatide is a dual GIP and GLP-1 receptor agonist that selectively binds and activates both receptors, enhancing first- and second-phase insulin secretion and reducing glucagon levels in a glucose-dependent manner, thereby lowering fasting and postprandial glucose, decreasing food intake, and reducing body weight.
JANUMET XR combines sitagliptin, a selective DPP-4 inhibitor that slows inactivation of incretin hormones (GLP-1 and GIP) to increase insulin release and decrease glucagon in a glucose-dependent manner, and metformin, a biguanide that decreases hepatic glucose production, reduces intestinal glucose absorption, and improves peripheral insulin sensitivity without altering insulin secretion.
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Most Common Insurance
Anthem BCBS
Mounjaro
- Covered on 5 commercial plans
- PA (12/12) · Step Therapy (10/12) · Qty limit (11/12)
Janumet
- Covered on 5 commercial plans
- PA (0/12) · Step Therapy (9/12) · Qty limit (11/12)
UnitedHealthcare
Mounjaro
- Covered on 4 commercial plans
- PA (8/8) · Step Therapy (0/8) · Qty limit (8/8)
Janumet
- Covered on 4 commercial plans
- PA (0/8) · Step Therapy (0/8) · Qty limit (2/8)
Humana
Mounjaro
- Covered on 0 commercial plans
- PA (3/3) · Step Therapy (1/3) · Qty limit (3/3)
Janumet
- Covered on 0 commercial plans
- PA (1/3) · Step Therapy (1/3) · Qty limit (3/3)
Coverage data sourced from MMIT. Updated monthly.
Savings
$25/momo
Mounjaro Savings CardCommercial or private insurance
Medicare, Medicaid, VA, TRICARE
Final cost depends on formulary coverage
No savings programs available for Janumet.
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Clinical data sourced from FDA-approved labeling. Coverage data via MMIT. Updated monthly.