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Clinical Studies Experience

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 trials of another drug and may not reflect the rates observed in practice.

The safety data described below reflect exposure to ALLEGRA (fexofenadine hydrochloride) in 5083 patients in trials for allergic rhinitis and chronic idiopathic urticaria. In these trials, 3010 patients 12 years of age and older with seasonal allergic rhinitis were exposed to ALLEGRA (fexofenadine hydrochloride) at doses of 20 to 240 mg twice daily or 120 to 180 mg once daily. A total of 646 patients 6 to 11 years of age with seasonal allergic rhinitis were exposed to ALLEGRA (fexofenadine hydrochloride) at doses of 15 to 60 mg twice daily. The duration of treatment in these trials was 2 weeks. A total of 534 patients 6 months to 5 years of age with allergic rhinitis were exposed to ALLEGRA (fexofenadine hydrochloride) at doses of 15 to 30 mg twice daily. The duration of treatment in these trials ranged from 1 day to 2 weeks. There were 893 patients 12 years of age and older with chronic idiopathic urticaria exposed to ALLEGRA (fexofenadine hydrochloride) at doses of 20 to 240 mg twice daily or 180 mg once daily. The duration of treatment in these trials was 4 weeks.

Seasonal Allergic Rhinitis

Adults and Adolescents: In placebo-controlled seasonal allergic rhinitis clinical trials in subjects 12 years of age and older, 2439 subjects received ALLEGRA (fexofenadine hydrochloride) capsules at doses of 20 mg to 240 mg twice daily. All adverse reactions that were reported by greater than 1% of subjects who received the recommended daily dose of ALLEGRA (fexofenadine hydrochloride) (60 mg capsules twice daily) are listed in Table 1.

In another placebo-controlled clinical study in the United States, 571 subjects aged 12 years and older received ALLEGRA (fexofenadine hydrochloride) tablets at doses of 120 or 180 mg once daily. Table 1 also lists adverse reactions that were reported by greater than 2% of subjects treated with ALLEGRA (fexofenadine hydrochloride) tablets at doses of 180 mg once daily.

The incidence of adverse reactions, including somnolence/fatigue, was not dose-related and was similar across subgroups defined by age, gender, and race.

Table 1: Adverse reactions in subjects aged 12 years and older reported in placebo-controlled seasonal allergic rhinitis clinical trials in the United States

Twice-daily dosing with fexofenadine capsules at rates of greater than 1%
Adverse reaction Fexofenadine 60 mg Twice Daily
(n=680)
Frequency
Placebo Twice Daily
(n=674)
Frequency
Dysmenorrhea 1.5% 0.3%
Once-daily dosing with ALLEGRA (fexofenadine hydrochloride) tablets at rates of greater than 2%
Adverse reaction Fexofenadine 180 mg Once Daily
(n=283)
Frequency
Placebo
(n=293)
Frequency
Headache 10.3% 7.2%
Back Pain 2.5% 1.4%

The frequency and magnitude of laboratory abnormalities were similar in ALLEGRA (fexofenadine hydrochloride)- and placebo-treated subjects.

Pediatrics: Table 2 lists adverse reactions in subjects aged 6 years to 11 years of age which were reported by greater than 2% of subjects treated with ALLEGRA (fexofenadine hydrochloride) tablets at a dose of 30 mg twice daily in placebo-controlled seasonal allergic rhinitis studies in the United States and Canada.

Table 2: Adverse reactions reported in placebo-controlled seasonal allergic rhinitis studies in pediatric subjects aged 6 years to 11 years in the United States and Canada at rates of greater than 2%

Adverse reaction Fexofenadine 30 mg Twice Daily
(n=209)
Frequency
Placebo
(n=229)
Frequency
Cough 3.8% 1.3%
Upper Respiratory Tract Infection 2.9% 0.9%
Pyrexia 2.4% 0.9%
Otitis Media 2.4% 0.0%

Table 3 lists adverse reactions in subjects 6 months to 5 years of age which were reported by greater than 2% of subjects treated with ALLEGRA (fexofenadine hydrochloride) in 3 open single- and multiple-dose pharmacokinetic studies and 3 placebo-controlled safety studies with ALLEGRA (fexofenadine hydrochloride) capsule content (484 subjects) and suspension (50 subjects) at doses of 15 mg (108 subjects) and 30 mg (426 subjects) given twice a day.

Table 3: Adverse reactions reported in placebo-controlled studies in pediatric subjects with allergic rhinitis aged 6 months to 5 years of age at rates greater than 2%

Adverse reaction Fexofenadine 15 mg Twice Daily
(n=108)
Frequency
Fexofenadine 30 mg Twice Daily
(n=426)
Frequency
Fexofenadine Total
Twice Daily
(n=534)
Frequency
Placebo
(n=430)
Frequency
Vomiting 12.0% 4.2% 5.8% 8.6%
Diarrhea 3.7% 2.8% 3.0% 2.6%
Somnolence/Fatigue 2.8% 0.9% 1.3% 0.2%
Rhinorrhea 0.9% 2.1% 1.9% 0.9%

Chronic Idiopathic Urticaria

Adverse reactions reported by subjects 12 years of age and older in placebo-controlled chronic idiopathic urticaria studies were similar to those reported in placebo-controlled seasonal allergic rhinitis studies.

In placebo-controlled chronic idiopathic urticaria clinical trials, 726 subjects 12 years of age and older received ALLEGRA (fexofenadine hydrochloride) tablets at doses of 20 to 240 mg twice daily. Table 4 lists adverse reactions in subjects aged 12 years and older which were reported by greater than 2% of subjects treated with ALLEGRA (fexofenadine hydrochloride) 60 mg tablets twice daily in controlled clinical studies in the United States and Canada.

In a placebo-controlled clinical study in the United States, 167 subjects aged 12 years and older received ALLEGRA (fexofenadine hydrochloride) 180 mg tablets. Table 4 also lists adverse reactions that were reported by greater than 2% of subjects treated with ALLEGRA (fexofenadine hydrochloride) tablets at doses of 180 mg once daily.

Table 4: Adverse reactions reported in subjects 12 years of age and older in placebo-controlled chronic idiopathic urticaria studies

Twice-daily dosing with ALLEGRA (fexofenadine hydrochloride) in studies in the UnitedStates and Canada at rates of greater than 2%
Adverse reaction Fexofenadine 60 mg Twice Daily
(n=191)
Frequency
Placebo
(n=183)
Frequency
Dizziness 2.1% 1.1%
Back Pain 2.1% 1.1%
Stomach discomfort 2.1% 0.6%
Pain in extremity 2.1% 0.0%
Once-daily dosing with ALLEGRA (fexofenadine hydrochloride) in a study in the United States at rates of greater than 2%
Adverse reaction Fexofenadine 180 mg Once Daily
(n=167)
Frequency
Placebo
(n=92)
Frequency
Headache 4.8% 3.3%

The safety of ALLEGRA (fexofenadine hydrochloride) in the treatment of chronic idiopathic urticaria in pediatric patients 6 months to 11 years of age is based on the safety profile of ALLEGRA (fexofenadine hydrochloride) in adults and pediatric patients at doses equal to or higher than the recommended dose [see Use in Specific Populations].

Postmarketing Experience

In addition to the adverse reactions reported during clinical studies and listed above, the following adverse events have been identified during post-approval use of ALLEGRA (fexofenadine hcl). 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. Events that have been reported rarely during postmarketing experience include: insomnia, nervousness, sleep disorders or paroniria, and hypersensitivity reactions (including anaphylaxis, urticaria, angioedema, chest tightness, dyspnea, flushing, pruritus, and rash).