Cell percentage analysis of MCF7 cells after 24 h of treatment with cannabidiol, chemotherapeutic drugs, and their synergistic combinations (A-E). CBD = cannabidiol: DOC = docetaxel: DOX = doxorubicin: PTX = paclitaxel: SN−38: VIN = vinorelbine. (A) CDOC = CBD (39.75 µM) + DOC (0.5 µM), (B) CDOX = CBD (38.42 µM) + DOX (0.2 µM), (C) CPTX = CBD (64.60 µM) + PTX (0.1 µM), (D) CSN−38 = CBD (42.45 µM) + SN−38 (0.11 µM), (E) CVIN = CBD (42.4 µM) + VIN (0.1 µM). Superscript letters indicate statistical significance derived from two-way ANOVA and Tukey’s multiple comparisons within the same cell group, where different letters are statistically significant at p < 0.05 (n = 3). Raw data are available in Table S3.