Table 1 Naranjo adverse drug reaction probability scale calculated for our case

1

Are there previous conclusive reports on this reaction?

Yes

+1

2

Did the adverse event appear after the suspected drug was given?

Yes

+2

3

Did the adverse reaction improve when the drug was discontinued or a specific antagonist was given?

No

0

4

Did the adverse reaction appear when the drug was re-administered?

Do not know

0

5

Are there alternative causes (other than the drug) that could have caused the reaction?

Yes

+2

6

Did the reaction reappear when a placebo was given?

Do not know

0

7

Was the drug detected in any body fluid in toxic concentrations?

Do not know

0

8

Was the reaction more severe when the dose was increased/increasing or less severe when the dose was decreased?

No

0

9

Did the patient have a similar reaction to the same or similar drugs in any previous exposure?

Yes

+1

Total

6