Bromelain, extracted from the stem of the pineapple, is a complex enzyme used for different purposes. Bromelain supplements are often used to facilitate digestion, improve the circulatory system and relieve arthritis symptoms due to its pain relief. However, in some cases where there is a risk of antibiotic use or bleeding, the use of bromelain or direct consumption of pineapple should be limited. For this purpose, this study was carried out to show the mechanism by which the antibiotic bromelain interaction occurs. Firstly, the bromelain molecule and demeclocycline, minocycline, and tetracycline antibiotics were prepared in the UCSF Chimera visualizing program. The interactions were monitored in the Auto Dock Molecular Modelling Toolkit molecular modeling program. The free binding energies of these interactions were also calculated in Auto Dock. According the molecular modelling results, bromelain and demeclocycline, minocycline, tetracycline antibiotics were interact with hydrogen bonds and hydrophobic interactions. These interactions between bromelain and antibiotics were energetically favorable based on free binding energy calculations.