Critical Seriousness - Abnormal Liver Function Tests - Abnormal Hepatic Function Tests is a Life Threatening Side Effect of Clarinex Critical Seriousness - Allergic Reaction caused by a Drug - Hypersensitivity Drug Reactions is a Life Threatening Side Effect of Clarinex Critical Seriousness - Fast Heartbeat - Tachyarrhythmia is a Life Threatening Side Effect of Clarinex Critical Seriousness - Heart Throbbing or Pounding - Palpitations is a Life Threatening Side Effect of Clarinex Critical Seriousness - Hepatitis is a Life Threatening Side Effect of Clarinex Critical Seriousness - High Amount of Bilirubin in the Blood - Hyperbilirubinemia is a Life Threatening Side Effect of Clarinex Critical Seriousness - Hives - Urticaria is a Life Threatening Side Effect of Clarinex Critical Seriousness - Itching - Pruritus of Skin is a Life Threatening Side Effect of Clarinex Critical Seriousness - Life Threatening Allergic Reaction - Anaphylaxis is a Life Threatening Side Effect of Clarinex Critical Seriousness - Rash - Skin Rash is a Life Threatening Side Effect of Clarinex Critical Seriousness - Trouble Breathing - Dyspnea is a Life Threatening Side Effect of Clarinex Critical Seriousness - Visible Water Retention - Edema is a Life Threatening Side Effect of Clarinex |