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Table 1 Classification of drug interactions by Drug Interaction Facts Software 13

From: Potential drug interactions and duplicate prescriptions among ambulatory cancer patients: a prevalence study using an advanced screening method

Classification

Description

Severity

 

1

Major: life-threatening or permanent damage

2

Moderate: deterioration of patient's status, treatment is required

3

Minor: bothersome or little effect

Documentation

 

1

Established: proven to occur in well-controlled studies

2

Probable: very likely, but not proven clinically

3

Suspected: may occur; some good data, but needs more study

4

Possible: could occur, but data are very limited

5

Unlikely: doubtful; no good evidence of a clinical effect