Table 1.

MRP Categories and Subtypes, Adapted From Hepler and Strand5

Category	Subclassification	Definition
Adverse drug reaction		Side effect of a drug, including sensitivities, intolerances, and allergies.
Drug interactions	Drug–drug Drug–disease	Actual or potential problem associated with a combination of medications and/or a medical condition.
Incorrect dosage	Subtherapeutic Supratherapeutic	A medical condition that is being treated with drug therapy; however, the dose may be too low or too high.
Incorrect drug choice		A medical condition that is being treated with a suboptimal medication when an alternative is available.
Nonadherence	Intentional Unintentional Financial Sociological	The patient is prescribed a drug for a medical condition but is not taking it due to psychological, sociological, or economic reasons.
Unnecessary drug use		The patient is taking a medication in the absence of a current indication.
Untreated indications		A medical condition that requires drug therapy but is not being treated with medication.