The study will investigate the effect of single dose and multiple doses of M2951 on midazolam Pharmacokinetics (PK) in healthy participants.

Inclusion Criteria:

• Participants are overtly healthy as determined by medical evaluation, including no clinically significant abnormality identified on physical examination or laboratory evaluation and no active clinically significant disorder, condition, infection or disease that would pose a risk to participant safety or interfere with the study evaluation, procedures, or completion
• Participants have a body weight within 50.0 and 100.0 kilograms [kg] (inclusive) and body mass index within the range of 19.0 and 30.0 kilograms per square meter [kg/m^2] (inclusive)
• Other protocol defined inclusion criteria could apply

Exclusion Criteria:

• History or presence of clinically relevant respiratory, gastrointestinal, renal, hepatic, hematological, lymphatic, neurological, cardiovascular, psychiatric, musculoskeletal, genitourinary, immunological, dermatological, connective tissue diseases or disorders, as determined by medical evaluation
• Individuals with diagnosis of hemochromatosis, Wilson´s disease, alpha 1 antitrypsin deficiency, or any other chronic liver disease including Gilbert's disease will be excluded from the study
• Prior history of cholecystectomy or splenectomy, and any clinically relevant surgery within 6 months prior to Screening
• History of any malignancy
• History of chronic or recurrent acute infection or any bacterial, viral, parasitic or fungal infections within 30 days prior to Screening and at any time between Screening and admission, or hospitalization due to infection within 6 months prior to Screening
• History of shingles within 12 months prior to Screening
• History of drug hypersensitivity, ascertained or presumptive allergy/hypersensitivity to the active drug substance and/or formulation ingredients; history of serious allergic reactions leading to hospitalization or any other hypersensitivity reaction in general, which may affect the safety of the participant and/or outcome of the study per the Investigator's discretion
• History of alcoholism or drug abuse within 2 years prior to Screening, or positive for drugs of abuse, nicotine/cotinine or alcohol by the laboratory assays conducted during Screening and Day -1
• History of residential exposure to tuberculosis, or a positive QuantiFERON® test within 4 weeks prior to or at the time of Screening
• Administration of live vaccines or live-attenuated virus vaccines within 3 months prior to Screening
• Moderate or strong inhibitors or inducers of Cytochrome P450, family 3, subfamily A (CYP3A4/5) within 4 weeks prior to the first administration of study intervention
• Other protocol defined exclusion criteria could apply

Per company policy, following approval of a new product or a new indication for an approved product in both the EU and the US, Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany, will share study protocols, anonymized patient level and study level data and redacted clinical study reports from clinical trials in patients with qualified scientific and medical researchers, upon request, as necessary for conducting legitimate research. Further information on how to request data can be found on our website https://www.merckgroup.com/en/research/our-approach-to-research-and-development/healthcare/clinical-trials/commitment-responsible-data-sharing.html