Comparison of Two Identical NN1250 Formulations in Healthy Volunteers

Inclusion Criteria: * Considered generally healthy upon completion of medical history, physical examination, vital signs and electrocardiogram (ECG), as judged by the Investigator * Body mass index 18.0-27.0 kg/m\^2 (both inclusive) Exclusion Criteria: * Subject who has donated any blood or plasma in the past month or more than 500 mL within 3 months prior to screening * Smoker (defined as a subject who is smoking more than 5 cigarettes or the equivalent per day) * Not able or willing to refrain from smoking and use of nicotine gum or transdermal nicotine patches during the inpatient period * Female of childbearing potential who is pregnant, breast-feeding or intends to become pregnant or is not using adequate contraceptive methods (adequate contraceptive measures include sterilisation, hormonal intrauterine devices, oral contraceptives, sexual abstinence or vasectomised partner)