This study will evaluate the potential drug interactions between ALXN2050 and cyclosporine (Part 1), between ALXN2050 and tacrolimus (Part 2), and between ALXN2050 and mycophenolate mofetil (MMF) (Part 3).

Inclusion Criteria:

• Medically healthy with no clinically significant or relevant abnormalities as determined by medical history, physical or neurological examination, vital signs, 12-lead electrocardiogram, screening clinical laboratory profiles (hematology, biochemistry, coagulation, and urinalysis), as deemed by the Investigator or designee at Screening.
• Body mass index within the range 18.0 to 32.0 kilograms (kg)/meter^2, inclusive, with a minimum body weight of 50.0 kg at Screening.

Exclusion Criteria:

• History of any medical or psychiatric condition or disease that might limit the participant's ability to complete or participate in this clinical study, confound the results of the study, or pose an additional risk to the participant by their participation in the study.
• Participation in another investigational drug or investigational device study within 5 half- lives (if known) or 30 days prior to the first dose of study intervention, whichever is longer.
• History of drug or alcohol abuse within 2 years prior to the first dose of study intervention or positive drugs-of-abuse or alcohol screen at Screening or Day -1; current tobacco users or smokers or a positive cotinine test at Screening.
• Donation of whole blood from 3 months prior to the first dose of study intervention, or of plasma from 30 days prior to the first dose of study intervention; receipt of blood products within 6 months prior to the first dose of study intervention.

Alexion has a public commitment to allow requests for access to study data and will be supplying a protocol, CSR, and plain language summaries.