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adverse reactions
6 ADVERSE REACTIONS Use of levocetirizine dihydrochloride tablets has been associated with somnolence, fatigue, and asthenia [see Warnings and Precautions (5.1) ]. The most common adverse reactions (rate > 2% and > placebo) were somnolence, nasopharyngitis, fatigue, dry mouth, and pharyngitis in subjects 12 years of age and older, and pyrexia, somnolence, cough, and epistaxis in children 6 to 12 years of age. ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Perrigo at 1-866-634-9120 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience The safety data described below reflect exposure to levocetirizine dihydrochloride tablets in 2708 patients with seasonal or perennial allergic rhinitis or chronic idiopathic urticaria in 14 controlled clinical trials of 1 week to 6 months duration. The short-term (exposure up to 6 weeks) safety data for adults and adolescents are based upon eight clinical trials in which 1896 patients (825 males and 1071 females aged 12 years and older) were treated with levocetirizine dihydrochloride tablets 2.5, 5, or 10 mg once daily in the evening. The short-term safety data from pediatric patients are based upon two clinical trials in which 243 children with seasonal or perennial allergic rhinitis (162 males and 81 females 6 to 12 years of age) were treated with levocetirizine dihydrochloride tablets 5 mg once daily for 4 to 6 weeks, one clinical trial in which 114 children (65 males and 49 females 1 to 5 years of age) with allergic rhinitis or chronic idiopathic urticaria were treated with levocetirizine dihydrochloride tablets 1.25 mg twice daily for 2 weeks, and one clinical trial in which 45 children (28 males and 17 females 6 to 11 months of age) with symptoms of allergic rhinitis or chronic urticaria were treated with levocetirizine dihydrochloride tablets 1.25 mg once daily for 2 weeks. The long-term (exposure of 4 or 6 months) safety data in adults and adolescents are based upon two clinical trials in which 428 patients (190 males and 238 females) with allergic rhinitis were exposed to treatment with levocetirizine dihydrochloride tablets 5 mg once daily. Long term safety data are also available from an 18-month trial in 255 levocetirizine dihydrochloride tablets-treated subjects 12-24 months of age. Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trial of another drug and may not reflect the rates observed in practice. Adults and Adolescents 12 years of Age and Older In studies up to 6 weeks in duration, the mean age of the adult and adolescent patients was 32 years, 44% of the patients were men and 56% were women, and the large majority (more than 90%) was Caucasian. In these trials 43% and 42% of the subjects in the levocetirizine dihydrochloride tablets 2.5 mg and 5 mg groups, respectively, had at least one adverse event compared to 43% in the placebo group. In placebo-controlled trials of 1-6 weeks in duration, the most common adverse reactions were somnolence, nasopharyngitis, fatigue, dry mouth, and pharyngitis, and most were mild to moderate in intensity. Somnolence with levocetirizine dihydrochloride tablets showed dose ordering between tested doses of 2.5, 5 and 10 mg and was the most common adverse reaction leading to discontinuation (0.5%). Table 1 lists adverse reactions that were reported in greater than or equal to 2% of subjects aged 12 years and older exposed to levocetirizine dihydrochloride tablets 2.5 mg or 5 mg in eight placebo-controlled clinical trials and that were more common with levocetirizine dihydrochloride tablets than placebo. Table 1 Adverse Reactions Reported in ≥ 2% * of Subjects Aged 12 Years and Older Exposed to Levocetirizine dihydrochloride Tablets 2.5 mg or 5 mg Once Daily in Placebo-Controlled Clinical Trials 1-6 Weeks in Duration Adverse Reactions Levocetirizine dihydrochloride Tablets 2.5 mg (n = 421) Levocetirizine dihydrochloride Tablets 5 mg (n = 1070) Placebo (n = 912) Somnolence 22 (5%) 61 (6%) 16 (2%) Nasopharyngitis 25 (6%) 40 (4%) 28 (3%) Fatigue 5 (1%) 46 (4%) 20 (2%) Dry Mouth 12 (3%) 26 (2%) 11 (1%) Pharyngitis 10 (2%) 12 (1%) 9 (1%) * Rounded to the closest unit percentage Additional adverse reactions of medical significance observed at a higher incidence than in placebo in adults and adolescents aged 12 years and older exposed to levocetirizine dihydrochloride tablets are syncope (0.2%) and weight increased (0.5%). Pediatric Patients 6 to 12 Years of Age A total of 243 pediatric patients 6 to 12 years of age received levocetirizine dihydrochloride tablets 5 mg once daily in two short-term placebo controlled double-blind trials. The mean age of the patients was 9.8 years, 79 (32%) were 6 to 8 years of age, and 50% were Caucasian. Table 2 lists adverse reactions that were reported in greater than or equal to 2% of subjects aged 6 to 12 years exposed to levocetirizine dihydrochloride tablets 5 mg in placebo-controlled clinical trials and that were more common with levocetirizine dihydrochloride tablets than placebo. Table 2 Adverse Reactions Reported in ≥2% * of Subjects Aged 6-12 Years Exposed to Levocetirizine dihydrochloride Tablets 5 mg Once Daily in Placebo-Controlled Clinical Trials 4 and 6 Weeks in Duration Adverse Reactions Levocetirizine dihydrochloride Tablets 5 mg (n = 243) Placebo (n = 240) Pyrexia 10 (4%) 5 (2%) Cough 8 (3%) 2 (<1%) Somnolence 7 (3%) 1 (<1%) Epistaxis 6 (2%) 1 (<1%) * Rounded to the closest unit percentage Clinical trial information in pediatric patients (age 6 months to 5 years) is approved for UCB Inc.'s levocetirizine dihydrochloride drug product. However, due to UCB Inc.'s marketing exclusivity rights; this drug product is not labeled for such use in those pediatric patients. Long-Term Clinical Trials Experience In two controlled clinical trials, 428 patients (190 males and 238 females) aged 12 years and older were treated with levocetirizine dihydrochloride tablets 5 mg once daily for 4 or 6 months. The patient characteristics and the safety profile were similar to that seen in the short-term studies. Ten (2.3%) patients treated with levocetirizine dihydrochloride tablets discontinued because of somnolence, fatigue or asthenia compared to 2 (<1%) in the placebo group. There are no long term clinical trials in children below 12 years of age with allergic rhinitis or chronic idiopathic urticaria. Laboratory Test Abnormalities Elevations of blood bilirubin and transaminases were reported in <1% of patients in the clinical trials. The elevations were transient and did not lead to discontinuation in any patient. 6.2 Post-Marketing Experience In addition to the adverse reactions reported during clinical trials and listed above, adverse events have also been identified during post-approval use of levocetirizine dihydrochloride tablets in other countries. Because these events are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Adverse events of hypersensitivity and anaphylaxis, angioneurotic edema, fixed drug eruption, pruritus, rash, and urticaria, convulsion, aggression and agitation, visual disturbances, palpitations, dyspnea, nausea, hepatitis, and myalgia have been reported. Besides these events reported under treatment with levocetirizine dihydrochloride tablets, other potentially severe adverse events have been reported from the post-marketing experience with cetirizine. Since levocetirizine is the principal pharmacologically active component of cetirizine, one should take into account the fact that the following adverse events could also potentially occur under treatment with levocetirizine dihydrochloride tablets: hallucinations, suicidal ideation, orofacial dyskinesia, severe hypotension, cholestasis, glomerulonephritis, and still birth.