“…These results also coincide with the study by Orellana, et al, 2021 which characterized antibiotics and anti-inflammatory drugs as the pharmacological groups with the highest number of adverse reactions in outpatients, representing 12.4% of the people studied; 27 in contrast to the study by Ruiz-Ramos et al, 2021 in which the therapeutic group of antithrombotics were responsible for the majority of adverse events 28, and the study by Machado-Duque et al, 2021 in which the pharmacological groups most involved in medication errors were antidiabetics. 29 According to the category of the event or severity of the event, within the findings of this study, the most reported category is category type G with 43%, this being one of the categories that represent a serious risk that can cause harm to the patient; unlike the study of Orellana et al 2021 75.1% of adverse drug events reported category A. 27 Likewise, adverse events of drug-related problems known as adverse reactions and adverse events related to professional practice were also found; the most frequently occurring drug-related problems are adverse drug reactions, coinciding with the findings of the studies by Velasco-Gonzalez, Loya-Perez, Navarro-Garcia and Sainz-Gil when describing that most of the adverse drug events are non-serious adverse drug reactions; 30 in the case of adverse events associated with professional practice, prescription and administration represent a considerable percentage of 7.3%, unlike adverse drug reactions, these events are considered avoidable; scientific evidence through studies such as the present one have proven that prescribing errors are the most frequent in professional practice, as evidenced by the study of Ferrández et al, 31 Garzón et al, Bohórquez-Moreno et al, 32 among many other studies that confirm that these prescribing errors are related to the incorrect use of the computerized medical order, work overload, communication failures, among many other factors.…”