IPRATROPIUM BROMIDE AND ALBUTEROL SULFATE

The active components in Ipratropium Bromide and Albuterol Sulfate Inhalation Solution, USP are albuterol sulfate and ipratropium bromide. Albuterol sulfate, is a salt of racemic albuterol and a relatively selective β 2 -adrenergic bronchodilator chemically described as α1-[(tert-butylamino)methyl]-4-hydroxy-m-xylene-α, α'-diol sulfate (2:1) (salt). It has a molecular weight of 576.7 and the empirical formula is (C 13 H 21 NO 3 ) 2 •H 2 SO 4 . It is a white crystalline powder, soluble in water and slightly soluble in ethanol. The World Health Organization recommended name for albuterol base is salbutamol. Figure 3 1-1. Chemical structure of albuterol sulfate. Ipratropium bromide is an anticholinergic bronchodilator chemically described as 8 -azoniabicyclo [3.2.1]-octane, 3-(3-hydroxy-1-oxo-2-phenylpropoxy)-8methyl-8-(1-methylethyl)-, bromide, monohydrate (endo, syn)-, (±)-; a synthetic quaternary ammonium compound, chemically related to atropine. It has a molecular weight of 430.4 and the empirical formula is C 20 H 30 BrNO 3 •H 2 O. It is a white crystalline substance, freely soluble in water and lower alcohols, and insoluble in lipophilic solvents such as ether, chloroform, and fluorocarbons. Figure 3. 1-2. Chemical structure of ipratropium bromide. Each 3 mL vial of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution, USP contains 3.0 mg (0.1%) of albuterol sulfate (equivalent to 2.5 mg (0.083%) of albuterol base) and 0.5 mg (0.017%) of ipratropium bromide in an isotonic, sterile, aqueous solution containing sodium chloride, hydrochloric acid to adjust to pH 4, and edetate disodium, USP (a chelating agent). Ipratropium Bromide and Albuterol Sulfate Inhalation Solution USP is a clear, colorless solution. It does not require dilution prior to administration by nebulization. For Ipratropium Bromide and Albuterol Sulfate Inhalation Solution,USP like all other nebulized treatments, the amount delivered to the lungs will depend on patient factors, the jet nebulizer utilized, and compressor performance. Using the Pari-LC-Plus™ nebulizer (with face mask or mouthpiece) connected to a PRONEB™ compressor system, under in vitro conditions, the mean delivered dose from the mouth piece (% nominal dose) was approximately 46% of albuterol and 42% of ipratropium bromide at a mean flow rate of 3.6 L/min. The mean nebulization time was 15 minutes or less. Ipratropium Bromide and Albuterol Sulfate Inhalation Solution, USP should be administered from jet nebulizers at adequate flow rates, via face masks or mouthpieces (see DOSAGE AND ADMINISTRATION ). 1 2

Ipratropium Bromide and Albuterol Sulfate Inhalation Solution is indicated for the treatment of bronchospasm associated with COPD in patients requiring more than one bronchodilator.

The recommended dose of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution is one 3 mL vial administered 4 times per day via nebulization with up to 2 additional 3 mL doses allowed per day, if needed. Safety and efficacy of additional doses or increased frequency of administration of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution beyond these guidelines has not been studied and the safety and efficacy of extra doses of albuterol sulfate or ipratropium bromide in addition to the recommended doses of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution have not been studied. The use of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution can be continued as medically indicated to control recurring bouts of bronchospasm. If a previously effective regimen fails to provide the usual relief, medical advice should be sought immediately, as this is often a sign of worsening COPD, which would require reassessment of therapy. A Pari-LC-Plus™ nebulizer (with face mask or mouthpiece) connected to a PRONEB™ compressor was used to deliver Ipratropium Bromide and Albuterol Sulfate Inhalation Solution to each patient in one U.S. clinical study. The safety and efficacy of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution delivered by other nebulizers and compressors have not been established. Ipratropium Bromide and Albuterol Sulfate Inhalation Solution should be administered via jet nebulizer connected to an air compressor with an adequate air flow, equipped with a mouthpiece or suitable face mask.

Ipratropium Bromide and Albuterol Sulfate Inhalation Solution is contraindicated in patients with a history of hypersensitivity to any of its components, or to atropine and its derivatives.

Adverse reaction information concerning Ipratropium Bromide and Albuterol Sulfate Inhalation Solution was derived from the 12-week controlled clinical trial. ADVERSE EVENTS OCCURRING IN ≥ 1% OF ≥ 1 TREATMENT GROUP(S) AND WHERE THE COMBINATION TREATMENT SHOWED THE HIGHEST PERCENTAGE Summary of Heart Protection Study Results Body System COSTART Term Albuterol n (%) Ipratropium n (%) Ipratropium Bromide and Albuterol Sulfate Inhalation Solution n (%) NUMBER OF PATIENTS 761 754 765 N (%) Patients with AE 327 (43.0) 329 (43.6) 367 (48.0) BODY AS A WHOLE Pain 8 (1.1) 4 (0.5) 10 (1.3) Pain chest 11 (1.4) 14 (1.9) 20 (2.6) DIGESTIVE Diarrhea 5 (0.7) 9 (1.2) 14 (1.8) Dyspepsia 7 (0.9) 8 (1.1) 10 (1.3) Nausea 7 (0.9) 6 (0.8) 11 (1.4) MUSCULO-SKELETAL Cramps leg 8 (1.1) 6 (0.8) 11 (1.4) RESPIRATORY Bronchitis 11 (1.4) 13 (1.7) 13 (1.7) Lung Disease 36 (4.7) 34 (4.5) 49 (6.4) Pharyngitis 27 (3.5) 27 (3.6) 34 (4.4) Pneumonia 7 (0.9) 8 (1.1) 10 (1.3) UROGENITAL Infection urinary tract 3 (0.4) 9 (1.2) 12 (1.6) Additional adverse reactions reported in more than 1% of patients treated with Ipratropium Bromide and Albuterol Sulfate Inhalation Solution included constipation and voice alterations. In the clinical trial, there was a 0.3% incidence of possible allergic-type reactions, including skin rash, pruritus, and urticaria. Additional information derived from the published literature on the use of albuterol sulfate and ipratropium bromide singly or in combination includes precipitation or worsening of narrow-angle glaucoma, acute eye pain, blurred vision, mydriasis, paradoxical bronchospasm, wheezing, exacerbation of COPD symptoms, drowsiness, aching, flushing, upper respiratory tract infection, palpitations, taste perversion, elevated heart rate, sinusitis, back pain, sore throat, and metabolic acidosis. Because these reactions 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.

Anticholinergic agents : Although ipratropium bromide is minimally absorbed into the systemic circulation, there is some potential for an additive interaction with concomitantly used anticholinergic medications. Caution is, therefore, advised in the co administration of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution with other drugs having anticholinergic properties. ß-adrenergic agents : Caution is advised in the co-administration of Ipratropium Bromide and Albuterol Sulfate Inhalation Solution and other sympathomimetic agents due to the increased risk of adverse cardiovascular effects. ß-receptor blocking agents : These agents and albuterol sulfate inhibit the effect of each other. β-receptor blocking agents should be used with caution in patients with hyperreactive airways, and if used, relatively selective β 1 selective agents are recommended. Diuretics : The electrocardiogram (ECG) changes and/or hypokalemia that may result from the administration of non-potassium sparing diuretics (such as loop or thiazide diuretics) can be acutely worsened by β-agonists, especially when the recommended dose of the β-agonist is exceeded. Although the clinical significance of these effects is not known, caution is advised in the co-administration of β-agonist-containing drugs, such as Ipratropium Bromide and Albuterol Sulfate Inhalation Solution, with non-potassium sparing diuretics. Monoamine oxidase inhibitors or tricyclic antidepressants : Ipratropium Bromide and Albuterol Sulfate Inhalation Solution should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors or tricyclic antidepressants, or within 2 weeks of discontinuation of such agents because the action of albuterol sulfate on the cardiovascular system may be potentiated.