Diagnostic Equivalence of the Skin Prick Test Tape vs. Conventional Skin PrickTest

Inclusion Criteria: * Subjects will be included only, if 1. they were informed about the nature, meaning, and scope of the study, and if they provided written consent to their participation 2. they are at least 18 years of age, 3. they have a history of allergic rhinitis due to grass and/or birch pollen, house dust mites, mugwort, cat and/or dog dander, and/or Alternaria since 2 years or more Exclusion Criteria: * Subjects may not be included, if 1. they are impaired in understanding nature, meaning, and the scope of the study, or are incapable of giving written informed consent, 2. they suffer from diseases, show other conditions, or take medications, which might impact the skin tests or might contradict the correct conduct and evaluation of the study. In particular this includes the following: 1. acute allergy, 2. history of systemic reactions or hypersensitivity to allergens, abuse of drugs or alcohol 3. severe diseases, 4. impaired reactivity of the skin (e.g. hyperkeratosis, ichthyosis, urticaria factitia) and acute chronic eczema in the skin test areas, skin infections, 5. pregnancy or nursing, 6. treatment with β-blockers, 7. treatment with antihistamines or systemic glucocorticoids during the last 4 weeks, with astemizol during the last 12 weeks, 8. treatment with tricyclic antidepressants benzodiazepines, and neuroleptic drugs which may have histamine-antagonistic effects during the last 2 weeks, 9. participation in any other medication study at the study time