Table 3.

Classification of DRPs on the Basis of the Causes ⁵¹

	Group of DRPs	Examples
Related to prescribing	Drug selection	Inappropriate drug; contraindications; duplication of drugs; too many drugs for one indication, etc.
	Drug form	Inappropriate drug form
	Dose selection	Dose too low or too high; wrong instructions for dosing, etc.
	Treatment duration	Too short or too long
Related to dispensing	Dispensing	No availability of the drug; no provision of the required information; wrong drug, wrong instructions, etc.
Related to drug use	Drug use process (administered by the health specialist or by the patient)	Inappropriate time dosing; patient abuses drug; takes too high or too low dose; wrong way of administration; inability to use the drug correctly, etc.