ICD-10-CM
- Rabies
- Racemoramide
- Racemorphan
- Racepinefrin
- Raclopride
- Radiator alcohol
- Radioactive drug NEC
- Radio-opaque (drugs) (materials)
- Ramifenazone
- Ramipril
- Ranitidine
- Ranunculus
- Rat poison NEC
- Rattlesnake (venom)
- Raubasine
- Raudixin
- Rautensin
- Rautina
- Rautotal
- Rauwiloid
- Rauwoldin
- Rauwolfia (alkaloids)
- Razoxane
- Realgar
- Recombinant (R)
- Red blood cells, packed
- Red squill (scilliroside)
- Reducing agent, industrial NEC
- Refrigerant gas (chlorofluoro-carbon)
- Regroton
- Rehydration salts (oral)
- Rela
- Relaxant, muscle
- Remoxipride
- Renese
- Renografin
- Replacement solution
- Reproterol
- Rescinnamine
- Reserpin (e)
- Resorcin, resorcinol (nonmedicinal)
- Respaire
- Respiratory drug NEC
- Retinoic acid
- Retinol
- Rh (D) immune globulin (human)
- Rhodine
- RhoGAM
- Rhubarb
- Ribavirin
- Riboflavin
- Ribostamycin
- Ricin
- Ricinus communis
- Rickettsial vaccine NEC
- Rifabutin
- Rifamide
- Rifampicin
- Rifampin
- Rifamycin
- Rifaximin
- Rimantadine
- Rimazolium metilsulfate
- Rimifon
- Rimiterol
- Ringer (lactate) solution
- Ristocetin
- Ritalin
- Ritodrine
- Roach killer
- Rociverine
- Rocky Mountain spotted fever vaccine
- Rodenticide NEC
- Rohypnol
- Rokitamycin
- Rolaids
- Rolitetracycline
- Romilar
- Ronifibrate
- Rosaprostol
- Rose bengal sodium (131I)
- Rose water ointment
- Rosoxacin
- Rotenone
- Rotoxamine
- Rough-on-rats
- Roxatidine
- Roxithromycin
- Rt-PA
- Rubbing alcohol
- Rubefacient
- Rubella vaccine
- Rubeola vaccine
- Rubidium chloride Rb82
- Rubidomycin
- Rue
- Rufocromomycin
- Russel's viper venin
- Ruta (graveolens)
- Rutinum
- Rutoside