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Mounjaro / tirzepatide for treating type 2 diabetes

This rating has a newer version, as of September 2025 — read the current report. This page stays on the record as originally published.

As of October 2023, MARA’s assessment finds Tirzepatide’s reimbursement risk concentrated in safety and adverse effects, with cost effectiveness a strength; the current MARA Rating and full rationale are available in the report.

The assessment also weighs care pathway integration: how the drug fits into the way care is organised today; a treatment that demands new infrastructure or displaces an established pathway faces extra scrutiny. The strength recorded in cost effectiveness carries weight because that domain asks whether the price asked stands in a defensible relationship to the benefit delivered — the core of most European reimbursement decisions.

Endocrinology

This rating sits within MARA’s Endocrinology coverage, alongside 9 other independently assessed treatments in the same area.

What payers will ask

Is the clinical benefit the kind payers reward? — Clinical effectiveness

Tirzepatide demonstrated a clear clinical advantage over comparators, showing statistically significant reductions in HbA1c levels and body weight across multiple Phase 3 trials (SURPASS-2 to -5). The evidence indicates that 81% to 97% of participants achieved HbA1c levels below 53 mmol/mol (7%), which is a significant improvement compared to existing therapies. However, the reliance on indirect comparisons with other GLP-1 receptor agonists introduces some uncertainty.

Does the economic case hold at the expected price? — Cost effectiveness

The cost-effectiveness estimates for tirzepatide are reported to be less than £20,000 per QALY gained against all comparators, which is within NICE’s acceptable range. Additional analyses provided by the company improved confidence in the economic model, supporting its cost-effective use in the Healthcare.

Is there quality-of-life evidence payers weigh? — Quality of life

While the document does not provide extensive HRQoL data, the significant weight loss and improved glycemic control associated with tirzepatide are likely to contribute positively to patients’ overall well-being. The committee acknowledged that the adverse effects are manageable, which supports the potential for moderate improvements in HRQoL.

Does the safety profile hold up for payers? — Safety and Adverse Effects

Tirzepatide was generally well tolerated in clinical trials, with common adverse effects being nausea, dyspepsia, and vomiting. These are consistent with other GLP-1 receptor agonists and are considered manageable in clinical practice. The committee noted that the adverse effects are not severe enough to undermine the overall benefit of the treatment.

Was the drug compared against what payers expect? — Comparator Selection

The company appropriately selected GLP-1 receptor agonists as comparators, which are relevant to the positioning of tirzepatide in the treatment pathway. The committee agreed that the chosen comparators reflect those used in Healthcare practice, although there was some concern about the exclusion of certain treatments.

Is the population defined the way payers need it? — Patient Population and Subgroups

The trial populations in the SURPASS studies were generally representative of the intended patient population in the Healthcare, with a focus on those inadequately controlled on existing therapies. However, the committee noted that the Healthcare population may have more lines of previous treatment than those in the trials.

Does the drug fit how care is delivered and paid for? — Care Pathway Integration

Tirzepatide can be integrated into existing care pathways with some adjustments, particularly regarding the titration of doses. The committee acknowledged that while there may be some challenges in adoption due to the injectable nature of the treatment, it is manageable within current practices.

Are the wider system costs understood? — Resource Use and Cost Implications

The budget impact of tirzepatide is considered manageable, with the potential for cost savings due to improved management of diabetes-related complications. The committee noted that the overall resource use aligns with the expected benefits of the treatment.

Would the evidence survive payer scrutiny? — Evidence Quality and Robustness

The evidence base is supported by multiple Phase 3 RCTs with low bias risk, and additional analyses have strengthened the credibility of the findings. The committee found the evidence robust enough to support the recommendations, despite some limitations in the NMA.

How exposed is the case to uncertainty? — Uncertainty, Sensitivity, and Broader Impacts

While there are some uncertainties related to the indirect comparisons and the NMA, the overall context of high unmet need for effective diabetes treatments mitigates these concerns. The committee felt that the potential benefits of tirzepatide justify its use despite these uncertainties.

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