rabbit anti-human thymocyte immunoglobulin rabeprazole sodium rabies vaccine rabies vaccine bp racecadotril racemic camphor radium-223 dichloride raloxifene hydrochloride raltegravir potassium raltitrexed ramipril ramucirumab ranibizumab ranitidine hydrochloride ranolazine rasagiline hemitartrate rasagiline mesilate rasagiline tartrate rasburicase ravulizumab raxtozinameran reboxetine recombinant cholera toxin b subunit regadenoson regorafenib relatlimab relebactam monohydrate relugolix remdesivir remifentanil hydrochloride remimazolam besylate repaglinide reslizumab respiratory syncytial virus (RSV) vaccine (recombinant, adjuvanted) respiratory syncytial virus vaccine (bivalent, recombinant) retinol palmitate rezafungin acetate Rhodiola rosea root extract ribavirin ribociclib succinate riboflavin rice powder rifabutin rifampicin rifaximin rilpivirine rilpivirine hydrochloride riltozinameran riluzole rimegepant riociguat ripretinib risankizumab risdiplam risedronate sodium risedronate sodium hemipentahydrate risperidone ritlecitinib tosylate ritonavir rituximab rivaroxaban rivastigmine rivastigmine hydrogen tartrate rizatriptan benzoate rocuronium bromide roflumilast romiplostim romosozumab ropeginterferon alfa-2b ropinirole ropinirole hydrochloride ropivacaine hydrochloride ropivacaine hydrochloride monohydrate rosuvastatin calcium rotigotine roxadustat rubella vaccine rucaparib camsylate rufinamide rumex crispus tincture rupatadine fumarate rurioctocog alfa pegol Ruxolitinib ruxolitinib phosphate Rye grass pollen (Lolium perenne)