Disermolide (discodermolide) is the immunosuppressant and antineoplastic agent. The marine natural product discodermolide was first isolated in 1990 from the deep-water Caribbean sponge Discodermia dissoluta. It attacks cancer cells in a similar way to the successful cancer drug Taxol that has become the best-selling anticancer drug in history. Discodermolide is a microtubule-stabilizing agent with potential for the treatment of taxol-refractory malignancies. Discodermolide is a drug that functions as an immunosuppressant and induces G2/M phase cell-cycle arrest in lymphoid and non-lymphoid cells. The cytotoxicity of discodermolide cause cell-cycle arrest by mitosis and an important alteration at the level of microtubules. Discodermolide is a potent inducer of accelerated senescence. At present, Phase I trials with discodermolide has been discontinued as a consequence of unsafe efficacy and toxicity results.