Merck & Co Inc has stopped a trial of Keytruda (pembrolizumab) which was being investigated to treat prostate cancer as part of a combination therapy with the hormone medicine enzalutamide and androgen deprivation therapy. The decision was based on the recommendation of the trial’s independent data monitoring committee on the basis of data from the Phase 3 KEYNOTE-991 trial. The decision was announced on 25 January.
