Ambiguity in linguistic expression causes an alteration in the transmitted message, which has an unfavorable impact on the recipient's interpretation. It constitutes a fact observed in all contexts, including the professional one, such as that of the University of Medical Sciences of Villa Clara, Cuba. Hence, the objective of the work was to analyze the negative effects caused by this phenomenon in professional communication. Consequently, a descriptive and synchronous study was carried out, where theoretical methods - analysis-synthesis, induction-deduction - were used; empirical methods—observation and documentary review—as well as systematic exchange with professionals from that institution. The percentage analysis was used to process the information. The universe: 49 research projects, framed between 2018 and 2022. The sample: 25 documents (51%). Then, the recorded data was analy...