Inclusion Criteria:  Scheduled for unilateral osseous surgery of the ankle or foot General anaesthesia with both a popliteal and a saphenous nerve block for postoperative analgesia Age of 18 or above American Society of Anaesthesiologists Physical Status Score of 1 to 3 Body Mass Index of 18 to 40, but a minimum weight of 50 kg. For fertile women, negative urine humane choriongonadotropine test and use of safe anti-conception Ability to understand the trial protocol, risks, benefits, and provide signed informed consent  Exclusion Criteria:  Inability to read and understand Danish Uncooperativeness (as judged by investigators) Participation in another trial involving medication Allergy to study medication Daily use of opioids above 30 mg/day morphine (or equivalents) Daily use of corticosteroids of more than 5 mg prednisolone equivalents within the past one month Neurological or musculoskeletal disease making block performance impossible (as judged by investigators) Dysregulated diabetes (as judged by investigators) Dysregulated anticoagulants (as judged by investigators) History of drug or alcohol abuse Glaucoma Contraindications for paracetamol or opioids Contraindications to general anaesthesia Other concomitant conditions needing surgery Other concomitant traumatic injuries