Critical Seriousness - A Rupture in the Wall of the Stomach or Intestine - Gastrointestinal Perforation is a Life Threatening Side Effect of Naproxen Critical Seriousness - Abnormal Heart Rhythm - Conduction Disorder of the Heart is a Life Threatening Side Effect of Naproxen Critical Seriousness - Abnormal Liver Function Tests - Abnormal Hepatic Function Tests is a Life Threatening Side Effect of Naproxen Critical Seriousness - Abnormally Low Blood Pressure - Hypotension is a Life Threatening Side Effect of Naproxen Critical Seriousness - Acquired Decrease of All Cells in the Blood - Pancytopenia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Acute Inflammation of the Pancreas - Acute Pancreatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Anemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Anxious - Anxiety is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bacterial Infection of Blood or Tissues affecting the Whole Body - Bacterial Septicemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bleeding Not Related to Menstrual Period - Metrorrhagia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bleeding of the Stomach or Intestines - Gastrointestinal Hemorrhage is a Life Threatening Side Effect of Naproxen Critical Seriousness - Blood Clot - Thrombotic Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bloody Urine - Hematuria is a Life Threatening Side Effect of Naproxen Critical Seriousness - Blurred Vision is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bronchospasm - Bronchospastic Pulmonary Disease is a Life Threatening Side Effect of Naproxen Critical Seriousness - Bruise - Bruising is a Life Threatening Side Effect of Naproxen Critical Seriousness - Canker Sore - Aphthous Stomatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Chest Tightness is a Life Threatening Side Effect of Naproxen Critical Seriousness - Chronic Heart Failure is a Life Threatening Side Effect of Naproxen Critical Seriousness - Coma is a Life Threatening Side Effect of Naproxen Critical Seriousness - Confused - Impaired Cognition is a Life Threatening Side Effect of Naproxen Critical Seriousness - Corneal Scar - Corneal Opacity is a Life Threatening Side Effect of Naproxen Critical Seriousness - Cramps is a Life Threatening Side Effect of Naproxen Critical Seriousness - Decreased Blood Platelets - Thrombocytopenic Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Decreased Neutrophils a Type of White Blood Cell - Neutropenic Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Decreased White Blood Cells - Leukopenia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Deficiency of Granulocytes a Type of White Blood Cell - Agranulocytosis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Depression is a Life Threatening Side Effect of Naproxen Critical Seriousness - Disease of the Heart and Blood Vessels - Disease of Cardiovascular System is a Life Threatening Side Effect of Naproxen Critical Seriousness - Double Vision - Diplopia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Elevation of Proteins in the Urine - Proteinuria is a Life Threatening Side Effect of Naproxen Critical Seriousness - Erythema Multiforme is a Life Threatening Side Effect of Naproxen Critical Seriousness - Excess Urination - Polyuria is a Life Threatening Side Effect of Naproxen Critical Seriousness - Excessive Thirst - Polydipsia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Fast Heartbeat - Tachyarrhythmia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Feeling Faint - Fainting is a Life Threatening Side Effect of Naproxen Critical Seriousness - Fever is a Life Threatening Side Effect of Naproxen Critical Seriousness - Fit - Tonic Clonic Seizure is a Life Threatening Side Effect of Naproxen Critical Seriousness - Fluid in the Lungs - Pulmonary Edema is a Life Threatening Side Effect of Naproxen Critical Seriousness - Giant Hives - Angioedema is a Life Threatening Side Effect of Naproxen Critical Seriousness - Glomerulonephritis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hallucination - Hallucinations is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hearing Problem - Hearing Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Heart Attack - Myocardial Infarction is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hemolytic Anemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hemorrhage of Blood Under the Skin - Ecchymosis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hepatitis caused by Drugs - Drug-Induced Hepatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hepatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - High Amount of Potassium in the Blood - Hyperkalemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - High Blood Pressure - Hypertension is a Life Threatening Side Effect of Naproxen Critical Seriousness - High Blood Sugar - Hyperglycemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Hives - Urticaria is a Life Threatening Side Effect of Naproxen Critical Seriousness - Increased Eosinophils in the Blood - Eosinophilia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Infiltration of White Blood Cells into the Lungs - Loeffler Syndrome is a Life Threatening Side Effect of Naproxen Critical Seriousness - Inflammation of Skin caused by an Allergy - Allergic Dermatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Inflammation of the Bladder - Cystitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Inflammation of the Large Intestine - Colitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Interstitial Nephritis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Itching - Pruritus of Skin is a Life Threatening Side Effect of Naproxen Critical Seriousness - Kidney Damage - Nephrotoxicity is a Life Threatening Side Effect of Naproxen Critical Seriousness - Kidney Disease - Renal Disease is a Life Threatening Side Effect of Naproxen Critical Seriousness - Kidney Failure - Renal Failure is a Life Threatening Side Effect of Naproxen Critical Seriousness - Large Purple or Brown Skin Blotches - Purpura is a Life Threatening Side Effect of Naproxen Critical Seriousness - Life Threatening Allergic Reaction - Anaphylaxis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Low Blood Counts due to Bone Marrow Failure - Aplastic Anemia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Low Blood Sugar - Hypoglycemic Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Lupus-Like Syndrome is a Life Threatening Side Effect of Naproxen Critical Seriousness - Meningitis Not Caused by an Infection - Non-Infective Meningitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Mental Impairment is a Life Threatening Side Effect of Naproxen Critical Seriousness - Mood Changes is a Life Threatening Side Effect of Naproxen Critical Seriousness - Muscle Pain - Myalgia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Nephrotic Syndrome is a Life Threatening Side Effect of Naproxen Critical Seriousness - Numbness, Tingling or Pain of Hands or Feet - Peripheral Neuropathy is a Life Threatening Side Effect of Naproxen Critical Seriousness - Pneumonia with High Amount of Eosinophil White Blood Cells - Eosinophilic Pneumonia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Pneumonia is a Life Threatening Side Effect of Naproxen Critical Seriousness - Problems with Eyesight - Visual Changes is a Life Threatening Side Effect of Naproxen Critical Seriousness - Rash - Skin Rash is a Life Threatening Side Effect of Naproxen Critical Seriousness - Reaction due to an Allergy - Allergic Reactions is a Life Threatening Side Effect of Naproxen Critical Seriousness - Red Blood in Bowel Movement - Bloody Stools is a Life Threatening Side Effect of Naproxen Critical Seriousness - Renal Papillary Necrosis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Renal Tubular Necrosis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Ringing in the Ears - Tinnitus is a Life Threatening Side Effect of Naproxen Critical Seriousness - Seizures - Seizure Disorder is a Life Threatening Side Effect of Naproxen Critical Seriousness - Significant Decrease in Lung Function - Respiratory Depression is a Life Threatening Side Effect of Naproxen Critical Seriousness - Skin Rash with Sloughing - Exfoliative Dermatitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Stevens-Johnson Syndrome is a Life Threatening Side Effect of Naproxen Critical Seriousness - Stomach Ulcer - Gastric Ulcer is a Life Threatening Side Effect of Naproxen Critical Seriousness - Stomach or Intestinal Ulcer - Gastrointestinal Ulcer is a Life Threatening Side Effect of Naproxen Critical Seriousness - Stroke - Cerebrovascular Accident is a Life Threatening Side Effect of Naproxen Critical Seriousness - Sudden Blindness and Pain Upon Moving the Eye - Optic Neuritis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Swollen Lymph Nodes - Lymphadenopathy is a Life Threatening Side Effect of Naproxen Critical Seriousness - Throwing Up Blood - Bloody Vomit is a Life Threatening Side Effect of Naproxen Critical Seriousness - Toxic Epidermal Necrolysis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Trouble Breathing - Dyspnea is a Life Threatening Side Effect of Naproxen Critical Seriousness - Ulcer from Stomach Acid - Peptic Ulcer is a Life Threatening Side Effect of Naproxen Critical Seriousness - Ulcers of Esophagus - Esophageal Ulcer is a Life Threatening Side Effect of Naproxen Critical Seriousness - Vasculitis is a Life Threatening Side Effect of Naproxen Critical Seriousness - Visible Water Retention - Edema is a Life Threatening Side Effect of Naproxen Critical Seriousness - Vocal Cord Swelling - Laryngeal Edema is a Life Threatening Side Effect of Naproxen Critical Seriousness - Water Retention - Body Fluid Retention is a Life Threatening Side Effect of Naproxen Critical Seriousness - Wheezing is a Life Threatening Side Effect of Naproxen Critical Seriousness - Yellowing of Skin or Eyes from Liver Problems - Jaundice is a Life Threatening Side Effect of Naproxen |