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Table. 2.

Table. 2.

Causality assessment using Naranjo Scale

 QuestionAnswer
Are there previous conclusive reports on this reaction?  Yes (1), No (0), Not known or not done (0)Yes (1)

Did adverse event appear after the suspected drug was administered?  Yes (2), No (-1), Not known or not done (0)Yes (2)

Did the adverse reaction improve when the drug was discontinued or a specific antagonist was administered?  Yes (1), No (0), Not known or not done (0)Not known (0)

Did the adverse reaction reappear when the drug was readministered?  Yes (2), No (-1), Not known or not done (0)Not known (0)

Are there alternative causes (other than the drug) that could have caused the reaction?  Yes (-1), No (2), Not known or not done (0)No (2)

Did the reaction reappear when a placebo was given?  Yes (-1), No (1), Not known or not done (0)Not known (0)

Was the drug detected in any body fluid in concentrations known to be toxic?  Yes (1), No (0), Not known or not done (0)Not known (0)

Was the reaction more severe when the dose was increased, or less severe when the dose was decreased?  Yes (1), No (0), Not known or not done (0)Not known (0)

Did the patient have a similar reaction to the same or similar drugs in any previous exposure?  Yes (1), No (0), Not known or not done (0)No (0)

Was the adverse event confirmed by any objective evidence?  Yes (1), No (0), Not known or not done (0)Not known (0)

Total score5

Causality evaluationProbable

Definite: ≥9, Probable: 5-8, Possible: 1-4, Doubtful: 0

Korean J Clin Pharm 2019;29:209-14 https://doi.org/10.24304/kjcp.2019.29.3.209
© 2019 Korean J Clin Pharm