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THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
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Po

Podagra

Gout: Causes

Point-of-service plans

How Health Care Is Paid For: POS

Poisoning

Poisoning
Nontoxic Household ProductsSidebar

  • acetaminophen

  • Acetaminophen Poisoning

  • aspirin

  • Aspirin Poisoning

  • carbon monoxide

  • Carbon Monoxide Poisoning

  • caustic substances

  • Caustic Substances Poisoning

  • contaminants and

  • Chemical Food Poisoning: Contaminant Poisoning

  • fish

  • Chemical Food Poisoning: Seafood Poisoning
    Cholera

  • food

  • see Food poisoning

  • hydrocarbon

  • Hydrocarbon Poisoning

  • insecticide

  • Insecticide Poisoning

  • iron

  • Iron Poisoning

  • lead

  • Lead Poisoning

  • lizard-bite

  • Lizard Bites

  • mushroom

  • Chemical Food Poisoning: Mushroom (Toadstool) Poisoning

  • plant

  • Chemical Food Poisoning: Plant and Shrub Poisoning
    Moderately Poisonous PlantsTables
    Chemical Food Poisoning: Plant and Shrub Poisoning

  • seafood

  • Chemical Food Poisoning: Seafood Poisoning
    Cholera

  • shellfish

  • Microorganisms That Cause GastroenteritisTables
    Chemical Food Poisoning: Shellfish Poisoning
    Cholera

  • snake-bite

  • Snake Bites
    Is That a Pit Viper?Figures

  • spider-bite

  • Spider Bites

  • toadstool

  • Chemical Food Poisoning: Mushroom (Toadstool) Poisoning

    Poison ivy

    Poison Ivy DermatitisSidebar

    Polio

    Polio

  • immunization for

  • Protecting Children Against Disease Through Vaccines Tables
    Protecting Adults Against Common Infectious DiseasesTables
    Common Vaccinations: Polio
    Vaccinations
    Vaccinating Infants and ChildrenFigures
    Polio: Prevention

  • muscle weakness after

  • Muscle Stimulation Disorders: Postpolio Syndrome

    Pollen

    Seasonal Allergies

    Polyangiitis

  • microscopic

  • Some Disorders Characterized by VasculitisTables
    Microscopic Polyangiitis

    Polyarteritis nodosa

    Some Disorders Characterized by VasculitisTables
    Polyarteritis Nodosa

    Polychondritis, relapsing

    Relapsing Polychondritis

    Polycystic kidney disease

    Polycystic Kidney Disease (PKD)
    Polycystic Kidney DiseaseFigures
    Some Genetic Disorders That Can Be Detected Before BirthTables
    Urinary Tract Defects: Kidney and Ureter Defects

    Polycystic ovary syndrome

    Polycystic Ovary Syndrome

  • obesity in

  • Obesity and the Metabolic Syndrome: Hormones

    Polycythemia

    Components of Blood: Red Blood Cells

  • in newborn

  • Polycythemia in the Newborn

  • primary (polycythemia vera)

  • Major Myeloproliferative Disorders Tables
    Polycythemia Vera

  • relative

  • What Are the Other Types of Polycythemia?Sidebar

  • secondary

  • What Are the Other Types of Polycythemia?Sidebar

    Polydipsia

  • in diabetes insipidus

  • Central Diabetes Insipidus: Symptoms and Diagnosis

  • in diabetes mellitus

  • Diabetes Mellitus (DM): Symptoms

  • psychogenic

  • Overhydration

    Polyglandular deficiency syndromes

    Polyglandular Deficiency SyndromesSidebar

    Polyhydramnios

    Problems With Amniotic Fluid

    Polymenorrhea

    Deciphering Medical Terms for Menstrual Disorders*Tables

    Polymerase chain reaction (PCR)

    Gene Technology

    Polymorphous light eruption

    Photosensitivity Reactions: Polymorphous Light Eruption

    Polymyalgia rheumatica

    Spotlight on AgingSidebar
    Giant Cell Arteritis: Polymyalgia Rheumatica

    Polymyositis

    Polymyositis and Dermatomyositis

  • in cancer

  • What Are Paraneoplastic Syndromes?Sidebar

    Polymyxin B

    AntibioticsTables

    Polyneuropathy

    Polyneuropathy

  • in cancer

  • What Are Paraneoplastic Syndromes?Sidebar

  • chronic inflammatory demyelinating

  • Polyneuropathy: Chronic Inflammatory Demyelinating Polyneuropathy 

  • diabetic

  • Diabetes Mellitus (DM): Complications

    Polyp(s)

  • cervical

  • Polyps of the Cervix

  • familial

  • Colorectal Polyps: Hereditary Conditions
    Colorectal Polyps: Treatment

  • gallbladder

  • Tumors of the Bile Ducts and Gallbladder

  • large intestine

  • Colorectal Polyps

  • nasal

  • Year-Round Allergies (Perennial Allergies): Symptoms and Diagnosis
    Year-Round Allergies (Perennial Allergies): Prevention
    Nasal Polyps
    Polyp Formation in the NoseFigures

  • stomach

  • Stomach Tumors That Are Noncancerous
    Stomach Cancer: Causes and Risk Factors

  • vocal cord

  • Vocal Cord Nodules and Polyps
    Vocal Cord ProblemsFigures

    Polypeptide antibiotics

    AntibioticsTables

    Polysomnography

    Diagnosis: Sleep Studies
    Sleep Apnea: Diagnosis
    Science Wakes Up to Sleep DisordersSidebar
    Sleep Disorders: Diagnosis
    Enlarged Tonsils and Adenoids: Diagnosis

    Polyuria

  • in diabetes insipidus

  • Central Diabetes Insipidus

  • in diabetes mellitus

  • Diabetes Mellitus (DM): Symptoms

    Polyvinyl chloride

    Primary Liver Cancers: Other Primary Liver Cancers

    Pompe's disease

    Types and Characteristics of Glycogen Storage DiseasesTables

    Pompholyx

    Dermatitis: Pompholyx

    Popcorn workers lung

    Who Is at Risk of Environmental Lung Diseases?Sidebar

    Popliteal artery, aneurysm of

    Aneurysms: Aneurysms in Other Arteries

    Popliteal cyst

    Baker's Cysts

    Porcelain veneers

    A Brighter Smile Through Cosmetic DentistrySidebar

    Porencephaly

    Other Birth DefectsTables

    Pork tapeworm

    Parasitic Infections: Cysticercosis
    Tapeworm Infection

    Porphobilinogen

    Acute Intermittent Porphyria: Diagnosis

    Porphobilinogen deaminase deficiency (acute intermittent porphyria)

    Acute Intermittent Porphyria

    Porphyria cutanea tarda

    Porphyria Cutanea Tarda

    Porphyrias

    Porphyrias
    Classifying PorphyriasSidebar
    Investigating the FamilySidebar

    Portal-systemic encephalopathy

    Hepatic Encephalopathy

    Portal-systemic shunt

    Portal Hypertension: Treatment

    Portal vein

    View of the Liver and GallbladderFigures
    Liver: Blood Supply of the Liver
    Blood Supply of the LiverFigures
    Blood Vessel Disorders of the Liver

  • high blood pressure in

  • Portal Hypertension

  • thrombosis of

  • Portal Vein Thrombosis

    Portuguese man-of-war sting

    Marine Animal Stings and Bites: Jellyfish

    Port-wine stain

    Growths and Malformations of the Vessels: Port-wine Stain
    Sturge-Weber Syndrome

    Posaconazole

    Drugs for Serious Fungal InfectionsTables

    Positron emission tomography (PET)

    Radionuclide Scanning: Positron Emission Tomography
    Diagnostic ProceduresTables

  • in heart disease

  • Diagnosis: Positron Emission Tomography

  • in Hodgkin lymphoma

  • Hodgkin Lymphoma: Staging

  • in lung disorders

  • Diagnosis: Chest Imaging

  • in neurologic disorders

  • How Imaging Tests Help in Diagnosing Nervous System DisordersTables

    Postconcussion syndrome

    Head Injuries: Minor Head Injury
    Concussion

    Posterior chamber, of eye

    An Inside Look at the EyeFigures
    Structure and Function

    Posterior interosseous nerve syndrome

    Nerve Compression Syndromes: Radial Tunnel Syndrome

    Posterior tibial nerve compression of (tarsal tunnel syndrome)

    Tarsal Tunnel Syndrome

    Posterior urethral valves

    Urinary Tract Defects: Bladder and Urethra Defects

    Postherpetic neuralgia

    Types: Postherpetic Neuralgia
    What Is Postherpetic Neuralgia?Sidebar

    Posthitis

    Inflammation of the Penis

    Postinfectious (acute disseminated) encephalomyelitis

    Other Primary Demyelinating Diseases
    Other Primary Demyelinating Diseases: Acute Disseminated Encephalomyelitis

    Postmature infant

    Postmaturity

    Postmaturity, of pregnancy

    Labor and Timing Problems: Postterm Pregnancy and Postmaturity

    Post-myocardial infarction syndrome

    Acute Pericarditis: Symptoms
    Acute Coronary Syndromes (Heart Attack; Myocardial Infarction; Unstable Angina): Other Problems
    Acute Coronary Syndromes (Heart Attack; Myocardial Infarction; Unstable Angina): Discharge

    Postpartum depression

    Postpartum Depression
    Preventing Depression After DeliverySidebar

  • information resources on

  • P

    Postpartum period

    Postdelivery Period
    After Delivery: The Body's Return to NormalTables
    After Delivery: When to Call the DoctorTables

    Postpolio syndrome

    Muscle Stimulation Disorders: Postpolio Syndrome
    Polio: Prognosis and Treatment

    Postprandial hypotension

    Fainting: Problems With Blood Pressure
    Postprandial Hypotension

    Post-streptococcal glomerulonephritis

    Glomerulonephritis (Nephritic Syndrome)

    Postterm pregnancy

    Labor and Timing Problems: Postterm Pregnancy and Postmaturity

    Posttraumatic stress

    Posttraumatic Stress Disorder (PTSD)

  • information resources on

  • P

    Posttraumatic stress disorder

  • in children and adolescents

  • Anxiety Disorders in Children: Posttraumatic Stress Disorder

    Postural drainage

    Chest Physical Therapy: Postural Drainage

    Postural (orthostatic) hypotension

    Fainting: Problems With Blood Pressure
    Orthostatic Hypotension

    Posture

    Low Back Pain: Prevention
    Manipulative and Body-Based Therapies: Postural Reeducation

    Potassium

    MineralsTables
    Potassium

  • high blood levels of (hyperkalemia)

  • Potassium: Hyperkalemia
    What Makes the Potassium Level Increase?Tables

  • in kidney failure

  • Chronic Kidney Failure: Diagnosis
    Chronic Kidney Failure: Treatment

  • periodic paralysis with

  • Periodic Paralysis

  • low blood levels of (hypokalemia)

  • Potassium: Hypokalemia
    What Makes the Potassium Level Decrease?Tables

  • in Bartter syndrome

  • Bartter Syndrome

  • in Cushing's syndrome

  • Potassium: Hypokalemia

  • in gastroenteritis

  • Gastroenteritis: Symptoms

  • in hyperaldosteronism

  • Hyperaldosteronism: Symptoms and Diagnosis

  • in Liddle syndrome

  • Liddle Syndrome

  • periodic paralysis with

  • Periodic Paralysis

  • reference range for

  • Blood Tests*Tables

  • supplementation with

  • Potassium: Treatment

  • generic substitutions for

  • When Generic Substitution May Not Be Appropriate Tables

    Potassium channel blockers

    Some Drugs Used to Treat ArrhythmiasTables

    Potassium citrate

  • in cystinuria

  • Cystinuria: Treatment

  • in urinary tract stones

  • Stones in the Urinary Tract: Treatment

    Potassium iodide

    Radiation Injury: Treatment

    Potency, of drugs

    Drug Action: Potency and Efficacy

    Potter's syndrome

    Problems With Amniotic Fluid
    Urinary Tract Defects: Kidney and Ureter Defects

    Pouches, esophageal

    Abnormal Propulsion of Food: Esophageal Pouches

    Powders

    Treatment: Topical Preparations
    Treatment: Protective Agents

    Power of attorney, for health care

    Legal Terms Related to Health CareSidebar
    Advance Directives: Durable Power of Attorney for Health Care

    Poxvirus infection (molluscum contagiosum)

    Molluscum Contagiosum

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