Table 3.

Prevalence of potential drug-drug interactions (pDDIs) in internal medicine wards

Type of prevalence	Frequency
Overall prevalence *	Patient: N (%) 386 (86.2)
Severity of pDDIs
A B C D X	71 (15.8) 243 (54.2) 352 (78.6) 168 (42) 41 (9.2)
Major Moderate Minor Rapid Delayed Unspecified	217 (48.4) 273 (60.9) 129 (28.8) 188 (42) 253 (65.5) 172 (38.4)
Number of pDDIs per patient
1-2 3-5 6-9 ≥ 10	100 (22.3) 89 (19.9) 82 (18.3) 115 (25.7)

^* Overall prevalence means presence of at least one pDDI regardless of type of severity.