- Pediatric patients who have at least one of the symptoms associated with allergic rhinitis including rhinorrhea, nasal congestion and sneezing, and require at least 2-week treatment with antihistamine drugs, or those who suffer from pruritus associated with the following diseases and require at least 2-week treatment with antihistamine drugs (- Chronic urticaria, - Eczema/dermatitis group: atopic dermatitis etc. [A diagnosis of atopic dermatitis is made in accordance with the "Definition/Diagnostic Criteria of Atopic Dermatitis, - Prurigo group: acute prurigo (strophulus, urticaria-like lichen, etc.), subacute prurigo, chronic prurigo (nodular prurigo etc.), - Pruritus cutaneous: systemic pruritus cutaneous, local pruritus cutaneous)