ديسا 5 مجم 20 قرص

12.1 Mechanism of Action Desloratadine is a long-acting tricyclic histamine antagonist with selective H 1 -receptor histamine antagonist activity. Receptor binding data indicates that at a concentration of 2-3 ng/mL (7 nanomolar), desloratadine shows significant interaction with the human histamine H 1 -receptor. Desloratadine inhibited histamine release from human mast cells in vitro . Results of a radiolabeled tissue distribution study in rats and a radioligand H 1 -receptor binding study in guinea pigs showed that desloratadine did not readily cross the blood brain barrier. The clinical significance of this finding is unknown.

Desloratadine Tablets are a histamine-1 (H1) receptor antagonist indicated for: • Seasonal Allergic Rhinitis: relief of nasal and non-nasal symptoms in patients 12 years of age and older. ( 1.1 ) • Perennial Allergic Rhinitis: relief of nasal and non-nasal symptoms in patients 12 years of age and older. ( 1.2 ) • Chronic Idiopathic Urticaria: symptomatic relief of pruritus, reduction in the number of hives, and size of hives in patients 12 years of age and older. ( 1.3 ) 1.1 Seasonal Allergic Rhinitis Desloratadine Tablets are indicated for the relief of the nasal and non-nasal symptoms of seasonal allergic rhinitis in patients 12 years of age and older. 1.2 Perennial Allergic Rhinitis Desloratadine Tablets are indicated for the relief of the nasal and non-nasal symptoms of perennial allergic rhinitis in patients 12 years of age and older. 1.3 Chronic Idiopathic Urticaria Desloratadine Tablets are indicated for the symptomatic relief of pruritus, reduction in the number of hives, and size of hives, in patients with chronic idiopathic urticaria 12 years of age and older.

Desloratadine Tablets may be taken without regard to meals. Dosage (by age): Adults and Adolescents 12 Years of Age and Over: • Desloratadine Tablets - one 5 mg tablet once daily ( 2 ) 2.1 Adults and Adolescents 12 Years of Age and Over The recommended dose of Desloratadine Tablets is one 5-mg tablet once daily. 2.5 Adults with Hepatic or Renal Impairment In adult patients with liver or renal impairment, a starting dose of one 5 mg tablet every other day is recommended based on pharmacokinetic data. Dosing recommendation for children with liver or renal impairment cannot be made due to lack of data [ see Clinical Pharmacology (12.3) ].

The following are discussed in greater detail in other sections of the label: • Hypersensitivity reactions. [ See (5.1) .] • The most common (reported in ≥2% of adult and adolescent patients with allergic rhinitis and greater than placebo) were pharyngitis, dry mouth, myalgia, fatigue, somnolence, dysmenorrhea. ( 6.1 ) To report SUSPECTED , contact Virtus Pharmaceuticals, LLC at 1-888-848-3593 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials 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 clinical practice. Adults and Adolescents Allergic Rhinitis: In multiple-dose placebo-controlled trials, 2834 patients ages 12 years or older received Desloratadine Tablets at doses of 2.5 mg to 20 mg daily, of whom 1655 patients received the recommended daily dose of 5 mg. In patients receiving 5 mg daily, the rate of adverse events was similar between Desloratadine and placebo-treated patients. The percent of patients who withdrew prematurely due to adverse events was 2.4% in the Desloratadine group and 2.6% in the placebo group. There were no serious adverse events in these trials in patients receiving desloratadine. All adverse events that were reported by greater than or equal to 2% of patients who received the recommended daily dose of Desloratadine Tablets (5 mg once daily), and that were more common with Desloratadine Tablets than placebo, are listed in Table 1. Table 1 Incidence of Adverse Events Reported by ≥2% of Adult and Adolescent Allergic Rhinitis Patients Receiving Desloratadine Tablets Adverse Event Desloratadine Tablets 5 mg (n=1655) Placebo (n=1652) Infections and Infestations Pharyngitis 4.1% 2.0% Nervous System Disorders Somnolence 2.1% 1.8% Gastrointestinal Disorders Dry Mouth 3.0% 1.9% Musculoskeletal and Connective Tissue Disorders Myalgia 2.1% 1.8% Reproductive System and Breast Disorders Dysmenorrhea 2.1% 1.6% General Disorders and Administration Site Conditions Fatigue 2.1% 1.2% The frequency and magnitude of laboratory and electrocardiographic abnormalities were similar in Desloratadine and placebo-treated patients. There were no differences in adverse events for subgroups of patients as defined by gender, age, or race....

Desloratadine Tablets are contraindicated in patients who are hypersensitive to this medication or to any of its ingredients or to loratadine [ see (5.1) and (6.2) ]. • Hypersensitivity ( 4 , 6.2 )

Storage • Desloratadine Tablets: Store at 25°C (77°F); excursions permitted to 15°-30°C (59°-86°F) [see USP Controlled Room Temperature]. Heat sensitive. Avoid exposure at or above 30°C (86°F). Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.