In this study, a known investigational medicine called 'semaglutide' will be tested in 2 drug concentrations of 0.68 milligram per milliliter (mg/mL) and 1.34 mg/mL. Both drug concentrations are tested for the treatment of type 2 diabetes. The U.S. Food and Drug Administration (FDA), has approved semaglutide in prefilled pen-injector form. Currently, the drug concentration of 1.34 mg/ml can be prescribed in some countries including U.S. The objective of the study is to compare the amount of investigational drug taken up in the body for the 2 drug concentrations. Participants will be divided by chance into 2 groups. Group A will receive a single dose of 0.5 mg semaglutide of the drug concentration 1.34 mg/mL in the first study period; and will receive a single dose of 0.5 mg semaglutide of the drug concentration 0.68 mg/mL in the second study period. Participants assigned to group B will receive the two drug concentrations in the reverse order. Participants will get 1 subcutaneous injection on Day 1 of each of the two study periods. The two injections are separated by 7-11 weeks. The study will last up to approximately 87 to 141 days for each participant. This includes a screening period (up to 4 weeks), study period 1 (5 weeks), washout period (2-6 weeks), and study period 2 (5 weeks). At some periods during the study, participant should not get vaccinations. Participant should agree on timing of vaccination with study doctor. Women cannot take part if pregnant, breast-feeding or plan to get pregnant during the study period.

Inclusion Criteria:

• Male or female
• Aged 18-55 years (both inclusive) at the time of signing informed consent
• Body mass index (BMI) between 20.0 and 29.9 kilograms per meter square (kg/m^2) (both inclusive)

Exclusion Criteria:

• Female who is pregnant, breast-feeding or intends to become pregnant or is of childbearing potential and not using highly effective contraceptive method

• Any disorder which in the investigator's opinion might jeopardise participant's safety or compliance with the protocol

• Use of prescription medicinal products or non-prescription drugs, except routine vitamins, topical medications, highly effective contraceptives and occasional use of paracetamol, ibuprofen and acetylsalicylic acid, within 14 days prior to the day of screening

• Abuse or intake of alcohol, defined as any of the below:

  1. Known or suspected alcohol abuse within 1 year before screening (defined as regular intake of more than an average intake of 24 grams (g) alcohol daily for men and 12 g alcohol daily for women - 12 g of alcohol equals about 300 milliliters (mL) of beer or lager, 100 mL of wine, or 25 mL spirits)
  2. Positive alcohol test at screening

• Abuse or intake of drugs, defined as any of the below:

  1. Known or suspected drug or chemical substance abuse within 1 year before screening
  2. Positive drug of abuse test at screening

According to the Novo Nordisk disclosure commitment on novonordisk-trials.com