- Rabies
- Rad
- Radial nerve palsy
- Radial neuropathy
- Radiation fibrosis, pulmonary
- Radiation pneumonitis
- Radiation reactions
- Radioactive compounds, in breast-feeding women
- Ramipril
- Ranson's criteria
- Rape
- Rape, STDs from
- Rash
- Rat-bite fever
- Rattlesnake bite
- Raynaud's disease and phenomenon
- Raynaud's syndrome
- Reactive arthritis
- Reactive cervical lymphadenopathy
- Reactive hypoglycemia
- Rectocele
- Recurrent jaundice of pregnancy
- Recurrent postpartum thyroiditis
- Recurrent vestibulopathy
- Red cell aplasia, pure, cancers with
- Red eye
- Red eye, circumcorneal (ciliary injection)
- Redwood sawdust, hypersensitivity pneumonitis from
- Reflexes, delayed relaxation
- Reflex sympathetic dystrophy
- Reflux, gastroesophageal
- Regurgitation, aortic
- Regurgitation, mitral
- Reiter's disease, diagnostic value of joint pattern in
- Reiter's syndrome
- Relafen
- Relapsing fever
- Relapsing polychondritis
- Rem
- Remeron, for depression
- REM periods
- Renal artery aneurysm
- Renal artery stenosis
- Renal cell carcinoma
- Renal cysts
- Renal diseases
- Renal failure
- Renal Goodpasture's syndrome
- Renal pelvis cancer
- Renal stones
- Renal tubular acidosis
- Repaglinide
- Rescriptor
- Rescula
- Reserpine
- Respiratory acidosis
- Respiratory acidosis and compensation for
- Respiratory alkalosis
- Respiratory alkalosis and compensation for
- Respiratory bronchiolitis-associated interstitial lung disease
- Respiratory bronchiolitis-associated interstitial lung disease (RB-ILD)
- Respiratory drugs, in breast-feeding women
- Respiratory failure, acute
- Respiratory infections, Haemophilus, drugs for
- Respiratory tract infections, recurrent
- Restoril
- Restrictive pericarditis
- Reteplase, for acute MI
- Retinal artery occlusion
- Retinal detachment
- Retinal vein occlusion
- Retinopathy
- Retrovir
- Retroviruses, therapy for
- Rewarming
- Rhabdomyolysis
- Rheumatic diseases, autoantibodies in
- Rheumatic manifestations of cancer
- Rheumatic manifestations of HIV
- Rheumatism, palindromic
- Rheumatoid arthritis
- Rheumatoid arthritis, diagnostic value of joint pattern in
- Rheumatoid arthritis, frequenc of autoantibodies
- Rheumatoid pleural fluid effusions
- Rhinitis
- Rhinitis, allergic
- Rhizopus mucormycosis
- Riboflavin deficiency
- Rickets
- Rickettsiae, drugs for
- Rickettsia felis
- Rickettsial diseases
- Rickettsia prowazekii
- Rickettsia rickettsii
- Rickettsia typhi
- Riedel's thyroiditis
- Rifampin
- Right middle lobe syndrome
- Rimexolone 1% suspension
- Ringing, in ears
- Ringworm infection, of body
- Risperdal
- Risperidone
- Ritonavir
- Rituximab
- River blindness
- Rocky Mountain spotted fever
- Rodenticide poisoning
- Rodent mites
- Rods, drugs for
- Roentgen
- Rofecoxib
- Rosacea
- Rosiglitazone
- Rosiglitazone/metformin
- Rotator cuff injuries
- Rotavirus, gastroenteritis from
- Rotor's syndrome
- Roxanol
- Roxicodone
- Rubella
- Rubeola (measles)
- Rufen