- patients who cannot cooperate to the study - patients who does not understand or speak danish - allergy to the drugs used in the study - has taken opioids within 12 hours prior to intervention - history of migraine or persistent headache before covid-19 infection. - active covid-19 infection (defined by the danish goverment regulations, i.e. 48 hours after last symptoms (omitting long term effects) or 7 days after positive covid-19 test if no symptoms.

- patients who cannot cooperate to the study - patients who does not understand or speak danish - allergy to the drugs used in the study - has taken opioids within 12 hours prior to intervention - history of migraine or persistent headache before covid-19 infection. - active covid-19 infection (defined by the danish goverment regulations, i.e. 48 hours after last symptoms (omitting long term effects) or 7 days after positive covid-19 test if no symptoms.

- patients who cannot cooperate to the study - patients who does not understand or speak danish - allergy to the drugs used in the study - has taken opioids within 12 hours prior to intervention - history of migraine or persistent headache before covid-19 infection. - active covid-19 infection.

- patients who cannot cooperate to the study - patients who does not understand or speak danish - allergy to the drugs used in the study - has taken opioids within 12 hours prior to intervention - history of migraine or persistent headache before covid-19 infection. - active covid-19 infection.