“…A recent study conducted in the USA showed that 46.3% of ICU prescriptions included pDDIs (Smithburger, Kane-Gill, Seybert, 2012), while Brazilian studies have reported a prevalence of 67% or 70% (Hammes et al, 2008;Moreira, Cassiani, 2011). In addition, there are international differences in drug availability that may contribute to regional variations in the number of pDDIs (Moreira, Cassiani, 2011;Moura, Prado, Acurcio, 2011;Moura et al, 2012).…”