OPDIVO (Nivolumab, Ono and Bristol) and KEYTRUDA (Pembrolizumab, MSD) are anticancer drugs containing anti-PD-1 antibody as an active ingredient. In 2019, OPDIVO and KEYTRUDA ranked fourth and first among all prescription drugs in Japan in terms of sales.
Recently, an invalidation trial was filed against Ono’s anti-PD-1 antibody patent. The outline is as follows.
Other invalidation trials against the following Ono’s patents were also filed.
JP 5159730: anti-PD-1 antibody patent
JP 5885764: anti-PD-L1 antibody patent
JP 6035372: anti-PD-1 antibody patent
JP 6258428: anti-PD-L1 antibody patent
In Japan, a few invalidation trials or oppositions against prescription drug patents are filed almost every month. It is recommended that pharmaceutical companies monitor these invalidation trials and oppositions.