From the 944 reported injection LASA pairs, Diazepam-Furosemide pair occurred in the highest frequency (34.55%). Diazepam is a high-alert drug with a narrow therapeutic range; however, the associated error categories were only A and B. From the 307 liquid dosage forms drug pairs, Alum milk-Milk of Magnesia pair was reported frequently. Among the 367 external drug pairs, the one occurred most frequently was 0.02% Triamcinolone cream-0.1% Triamcinolone cream. This study also identified confusing medication names and packaging in oncology medications. The names of several chemotherapy agents can look or sound alike (Carboplatin and Cisplatin, Vinblastine and Vincristine) or