Overview Efficacy and Safety of Levocetirizine Versus Loratadine for the Treatment of Perennial Allergic Rhinitis Status: Completed Trial end date: 2004-02-01 Target enrollment: Participant gender: Summary Efficacy and Safety of Levocetirizine Versus Loratadine for the Treatment of Perennial Allergic Rhinitis. Phase: Phase 3 Details Lead Sponsor: UCB PharmaTreatments: CetirizineLevocetirizineLoratadine