Desloratadine 5, 10 and 20mg in Patients With Cold Urticaria

Inclusion Criteria: * Informed consent signed and dated * Reliable method of contraception for both women of childbearing potential as well as man during the study and 3 months thereafter. A highly effective method of birth control is defined as those which result in a low failure rate (i.e. less than 1% per year) when used consistently and correctly such as implants, injectables, combined oral contraceptives, some IUDs, sexual abstinence or vasectomised partner * Outpatients with ACU for more than 6 weeks. Urticaria symptoms must comprise wheal and itch. * Age between 18 and 75 years Exclusion Criteria: * Subjects who are inmates of psychiatric wards, prisons, or other state institutions. Existing or planned placement in an institution after ruling according to § 40 passage 1 number 4 AMG (Arzneimittelgesetz). * The presence of permanent severe diseases, especially those affecting the immune system, except urticaria and cold urticaria * The presence of permanent gastrointestinal condition which may influence the oral therapy (chronic diarrhoea diseases, congenital malformations or surgical mutilations of gastrointestinal tract) * History or presence of epilepsy, significant neurological disorders, cerebrovascular attacks or ischemia * History or presence of myocardial infarction or cardiac arrhythmia which requires drug therapy * Evidence of severe renal dysfunction * Evidence of significant hepatic disease (liver enzymes twice the upper reference value) * History of adverse reactions to DL * Presence of active cancer which requires chemotherapy or radiation therapy * Presence of alcohol abuse or drug addiction * Intake of oral corticosteroids within 14 days prior to screening visit * Use of depot corticosteroids or chronic systemic corticosteroids within 21 days prior to screening visit * Use of systemic immunosupressants/immunomodulators like ciclosporine A, dapsone, methotrexate, mycophenolate, chloroquine, and comparable drugs within 28 days prior to screening visit. * Pregnancy or breast-feeding