immunosuppressiveadjective
uk/ˌɪm.jə.nəʊ.səˈpres.ɪv/us/ˌɪm.jəˌnoʊ.səˈpres.ɪv/specializedpreventing the immune system from reacting to antigens, for example in order to prevent transplanted organs from being rejected:
While immunosuppressive drugs can help prevent rejection of transplanted tissues or organs, they can also give rise to infections.