Inclusion Criteria:  Scheduled for unilateral osseous surgery of the hand or forearm. Anaesthesia with an infraclavicular brachial plexus block 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 and 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 anti-coagulants (as judged by investigators) History of drug or alcohol abuse Glaucoma Contraindications for paracetamol or opioids Other concomitant conditions needing surgery Other concomitant traumatic injuries