Harrison's Manual of Medicine
- radial neuropathy at spiral groove
- ragged red fibers
- raltegravir, for HIV infection
- ramucirumab, for gastric carcinoma
- ranolazine, for chronic stable angina
- rapid shallow breathing index (RSBI)
- rapid urease test
- rasagiline, for Parkinson's disease
- rasburicase, for tumor lysis syndrome
- rat-bite fever
- Raynaud's disease
- recluse spider bite
- recombinase activating gene deficiency
- recommended dietary allowance (RDA)
- rectal cancer
- red hepatization
- REE (resting energy expenditure)
- reentrant AV nodal tachycardia
- reflexes, testing of
- regurgitation
- rehydration, in diarrhea
- relapse prevention, in alcohol use disorder
- relapsing fever
- relapsing multiple sclerosis (RMS)
- relapsing polychondritis
- renal abscess
- renal artery stenosis
- repaglinide, for diabetes mellitus
- repositioning exercises, for vertigo
- reslizumab, for asthma
- respiratory bronchiolitis
- respiratory failure
- respiratory syncytial virus (RSV)
- resting energy expenditure (REE)
- retching
- reteplase, for thrombotic disorders
- reticular dysgenesis
- reticulocyte index (RI)
- reticulocytes
- retinal artery occlusion
- retinal detachment
- retinitis, cytomegalovirus
- retinitis pigmentosa
- retinoid, for psoriasis
- retinol-binding protein
- retinopathy, paraneoplastic
- reverse SLR sign
- Reye's syndrome
- rhabdomyolysis
- rheumatic (Sydenham's) chorea
- rheumatic fever, prophylaxis for
- rhinitis, allergic
- rhinocerebral mucormycosis
- rhinophyma
- rhinovirus
- Rhizomucor infections: see mucormycosis
- Rhizopus oryzae: see mucormycosis
- Rhodococcus infections
- RI (reticulocyte index)
- Richter's syndrome
- rickets
- Rift Valley fever
- right ventricular hypertrophy
- right ventricular systolic pressure (RVSP)
- rilpivirine, for HIV infection
- riluzole, for ALS
- Ringer's lactate, for cholera
- ringworm
- risedronate, for osteoporosis
- ritonavir, for HIV infection
- rivastigmine, for Alzheimer's disease
- river blindness
- rizatriptan, for migraine
- RMS (relapsing multiple sclerosis)
- rocuronium, for cocaine intoxication
- rodent-borne virus infections
- roflumilast, for COPD exacerbation prophylaxis
- Romaña's sign
- Romberg maneuver
- roseola infantum
- rose spots
- rosetting
- rosiglitazone, for diabetes mellitus
- Ross River virus infection
- rosuvastatin, for dyslipidemia
- rotavirus infections
- rotavirus vaccine
- rotigotine, for Parkinson's disease
- rouleaux formation
- roundworm infection
- RSBI (rapid shallow breathing index)
- RSV (respiratory syncytial virus)
- rubella
- rubeola (measles)
- rufinamide, for seizures
- rumination
- RVSP (right ventricular systolic pressure)