- H+ secretion defect, distal
- H2 receptor antagonists
- HACEK organisms, treatment of endocarditis from
- Haemophilus
- Haemophilus, drugs for
- Haemophilus ducreyi, chancroid from
- Haemophilus Infections
- Haemophilus influenzae
- Hair loss
- Hairy cell leukemia
- Hairy cell leukemia, treatment for
- Halcion
- Haldol
- Halitosis (bad breath)
- Hallucinations
- Halobetasol propionate
- Haloperidol
- Hand eczema
- Hand pain
- Hansen's disease (leprosy)
- Hantavirus
- Hashimoto's thyroiditis
- Hay, moldy, hypersensitivity pneumonitis from
- Hay fever
- HCO3-
- HCTZ
- HDL (high-density lipoprotein)
- HDL decreased
- Headache
- Headache, Tension
- Head and neck cancer
- Head and neck cancer, systemic treatment
- Head injury
- Head lice
- Hearing loss
- Heart attack
- Heartburn
- Heart failure
- Heart sounds
- Heart valve disease
- Heat cramps
- Heat exhaustion
- Heat exposure syndromes
- Heat rash
- Heat stroke
- Heat syncope
- Heavy chain disease
- Heel pain
- Helicobacter pylori
- Helicobacter pylori gastritis
- Helicobacter pylori peptic ulcer disease
- HELLP
- Helvella poisoning
- Hemangioblastoma, cerebellar
- Hematemesis
- Hematochezia
- Hematogenous osteomyelitis
- Hematuria
- Hemochromatosis
- Hemodialysis, for hyperkalemia
- Hemoglobin H disease
- Hemoglobinuria
- Hemolysis
- Hemolysis, autoimmune
- Hemolytic anemia
- Hemolytic anemia, autoimmune
- Hemolytic disease, in newborn
- Hemolytic transfusion reactions
- Hemolytic uremic syndrome
- Hemophilia A
- Hemophilia B
- Hemoptysis
- Hemorrhage
- Hemorrhagic fever
- Hemorrhagic gastritis
- Hemorrhagic stroke
- Hemorrhoids
- Hemosiderosis, idiopathic pulmonary
- Henoch-Schonlein purpura
- Heparin
- Heparinoid regimens, in venous thromboembolism prevention
- Hepatic abscess
- Hepatic artery aneurysms
- Hepatic encephalopathy
- Hepatic failure
- Hepatic failure, acute
- Hepatic vein obstruction
- Hepatitis
- Hepatitis A
- Hepatitis B, acute
- Hepatitis B, chronic
- Hepatitis B virus infection, serologic patterns in
- Hepatitis C, acute
- Hepatitis C, chronic
- Hepatitis D (delta)
- Hepatocellular carcinoma
- Hepatocellular carcinoma, paraneoplastic syndromes with
- Hepatocellular dysfunction, jaundice from
- Hepatomegaly
- Hepatopathy, ischemic
- Hepatopulmonary syndrome
- Hepatorenal syndrome
- Herbal ecstasy
- Herceptin
- Hereditary cholestatic syndromes
- Hereditary nonpolyposis colorectal cancer
- Hereditary spherocytosis
- Hernia, vaginal
- Herniated nucleus pulposus
- Heroin addiction
- Heroin overdose
- Herpes simplex virus (HSV) infections
- Herpes zoster
- Hiccups
- High-altitude encephalopathy, acute
- High-altitude pulmonary edema, acute
- High-density lipoprotein (HDL)
- Hip pain
- Hirsutism, virilization and
- Hirsutism & virilization
- Histoplasma capsulatum infection
- Histoplasmosis
- Histrionic disorder
- HIV
- Hivid
- HMS
- Hoarseness
- Hodgkin's disease
- Hodgkin's disease, treatment for
- Homocystinuria
- Hookworm disease
- Hordeolum (sty)
- Hormones
- Horner's syndrome
- Hospital-acquired fever
- Hospital-acquired pneumonia
- Hospitalization, nosocomial infections in
- Hot tub folliculitis
- HSV
- HTLV infection
- Humalog
- Humalog Mix 75/25
- Human bites
- Human herpes virus 8 (HHV-8)
- Human immunodeficiency virus (HIV)
- Human papillomavirus (HPV) infection
- Human T-cell lymphotrophic virus (HTLV)
- Humidifier lung
- Humoral immunity, ineffective
- Humulin
- Huntington's disease
- Hydatid disease
- Hydatidiform mole
- Hydralazine
- Hydrocarbon poisoning
- Hydrochlorothiazide
- Hydrocodone
- Hydrocortisone acetate
- Hydro-Diuril
- Hydromorphone
- Hydroxyurea
- Hydroxyzine
- Hygroton
- Hylorel
- Hymenolepis diminuta
- Hymenolepis nana
- Hyoscyamus niger poisoning
- Hyperacusis
- Hyperaldosteronism, primary
- Hyperandrogenism, amenorrhea from
- Hyperbilirubinemia
- Hypercalcemia
- Hypercalciuria, diagnostic criteria for
- Hypercalciuric calcium nephrolithiasis
- Hyperchloremia
- Hyperchloremic, normal anion gap metabolic acidoses
- Hypercholesterolemia
- Hypercitraturic calcium nephrolithiasis
- Hypercoagulable states
- Hypercortisolism
- Hyperemesis gravidarum
- Hyperglycemia
- Hyperglycemic hyperosmolar state
- Hypergonadotropic hypogonadism
- Hyperhidrosis
- Hyperkalemia
- Hyperkalemia, emergency treatment of
- Hyperlipidemia
- Hypermagnesemia
- Hypernatremia
- Hyperosmotic nonketotic coma
- Hyperoxaluric calcium nephrolithiasis
- Hyperparathyroidism
- Hyperparathyroidism, hypercalcemia in
- Hyperphosphatemia
- Hyperpigmentation
- Hyperprolactinemia
- Hyperprolactinemia, causes of
- Hypersensitivity pneumonitis
- Hypersensitivity pneumonitis, selected causes of
- Hypersomnia
- Hyperstat
- Hypertension
- Hypertensive emergencies
- Hyperthermia
- Hyperthyroidism
- Hyperthyroidism, cancers with
- Hypertonic hyponatremia
- Hypertrophic obstructive cardiomyopathy
- Hyperuricemia
- Hyperuricemia, endogenous
- Hyperuricosuric calcium nephrolithiasis
- Hyperventilation
- Hyperventilation syndromes
- Hypnotic agents
- Hypoalbuminemia, ascites from
- Hypoaldosteronism, hyporeninemic
- Hypocalcemia
- Hypochondriasis
- Hypoglycemia
- Hypoglycemic disorders
- Hypogonadism, female
- Hypogonadism, male
- Hypogonadotropic hypogonadism
- Hypokalemia
- Hypomagnesemia
- Hyponatremia
- Hypoparathyroidism
- Hypoparathyroidism, vitamin D preparations for
- Hypophosphatemia
- Hypopigmentation or depigmentation
- Hypopituitarism
- Hyporeninemic hypoaldosteronism
- Hypotension & shock
- Hypothermia
- Hypothermia of extremities
- Hypothyroidism
- Hypothyroidism, maternal
- Hypotonic hyponatremia
- Hypoventilation, chronic
- Hypoventilation, Primary alveolar
- Hypoxia and normal CXR
- Hysteria
- Hytrin
- Hyzaar