Inclusion Criteria:  The subject has a body mass index (BMI) ≥ 18.0 and ≤ 30.0 kg/m2, and a body weight ≥ 45 and ≤ 95 kg at the screening visit. The subject is, in the opinion of the investigator, generally healthy based on medical history, a physical examination, vital signs, an ECG, and the results of the clinical chemistry, haematology, urinalysis, serology, and other laboratory tests at screening.  Exclusion Criteria:  The subject fulfils the diagnostic criteria for a primary headache disorder, or has a first degree relative with a primary headache disorder, according to the International Headache Society (IHS) International Classification of Headache Disorders 3rd edition (ICHD-3), except tension-type headache. The subject has or has had tension-type headache more than once per month on average during the 6 months prior to the screening visit.  Other inclusion and exclusion criteria may apply.