Table 5.

Categorization of DDI severity.

Category	Lexicomp (Need Subscription)	Medscape (Free Use)	Micromedex (Need Subscription)
Severe	Avoid combination	Contraindicated	Contraindicated
Major	Consider therapy modification	Serious-use alternative	Major
Moderate	Monitor therapy	Monitor closely	Moderate
Minor	No action needed	Minor	Minor
No interaction	No known interaction	No interaction found	Unknown