Ipratropium Bromide

ADVERSE REACTIONS Adverse reaction information on ipratropium bromide nasal solution, 0.03% in patients with perennial rhinitis was derived from four multicenter, vehicle-controlled clinical trials involving 703 patients (356 patients on ipratropium bromide and 347 patients on vehicle), and a one-year, open-label, follow-up trial. In three of the trials, patients received ipratropium bromide nasal solution, 0.03% three times daily, for eight weeks. In the other trial, ipratropium bromide nasal solution, 0.03% was given to patients two times daily for four weeks. Of the 285 patients who entered the open-label, follow-up trial, 232 were treated for 3 months, 200 for 6 months, and 159 up to one year. The majority (>86%) of patients treated for one year were maintained on 42 mcg per nostril, two or three times daily, of ipratropium bromide nasal solution, 0.03%. Table 1 shows adverse events, and the frequency that these adverse events led to the discontinuation of treatment, reported for patients who received ipratropium bromide nasal solution, 0.03% at the recommended dose of 42 mcg per nostril, or vehicle two or three times daily for four or eight weeks. Only adverse events reported with an incidence of at least 2.0% in the ipratropium bromide group and higher in the ipratropium bromide group than in the vehicle group are shown. Table 1 % of Patients Reporting Events + Ipratropium bromide Vehicle Control Nasal Spray 0.03% (n=356) (n=347) Incidence % Discontinued % Incidence % Discontinued % + This table includes adverse events which occurred at an incidence rate of at least 2.0% in the ipratropium bromide group and more frequently in the ipratropium bromide group than in the vehicle group. 1 Epistaxis reported by 7.0% of ipratropium bromide patients and 2.3% of vehicle patients, blood-tinged mucus by 2.0% of ipratropium bromide patients and 2.3% of vehicle patients. 2 Nasal irritation includes reports of nasal itching, nasal burning, nasal irritation and ulcerative rhinitis. 3 Other nasal symptoms include reports of nasal congestion, increased rhinorrhea, increased rhinitis, posterior nasal drip, sneezing, nasal polyps and nasal edema. * All events are listed by their WHO term; rhinitis has been presented by descriptive terms for clarification. Headache 9.8 0.6 9.2 0.0 Upper respiratory tract infection 9.8 1.4 7.2 1.4 Epistaxis 1 9.0 0.3 4.6 0.3 Rhinitis * Nasal dryness 5.1 0.0 0.9 0.3 Nasal irritation 2 2.0 0.0 1.7 0.6 Other nasal symptoms 3 3.1 1.1 1.7 0.3 Pharyngitis 8.1 0.3 4.6 0.0 Nausea 2.2 0.3 0.9 0.0 Ipratropium bromide nasal solution, 0.03% was well tolerated by most patients. The most frequently reported nasal adverse events were transient episodes of nasal dryness or epistaxis. These adverse events were mild or moderate in nature, none was considered serious, none resulted in hospitalization and most resolved spontaneously or following a dose reduction. Treatment for nasal dryness and epistaxis was required infrequently (2% or less) and consisted of local application of pressure or a moisturizing agent (e.g., petroleum jelly or saline nasal spray). Patient discontinuation for epistaxis or nasal dryness was infrequent in both the controlled (0.3% or less) and one-year, open-label (2% or less) trials. There was no evidence of nasal rebound (i.e., a clinically significant increase in rhinorrhea, posterior nasal drip, sneezing or nasal congestion severity compared to baseline) upon discontinuation of double-blind therapy in these trials. Adverse events reported by less than 2% of the patients receiving ipratropium bromide nasal solution, 0.03% during the controlled clinical trials or during the open-label follow-up trial, which are potentially related to ipratropium bromide's local effects or systemic anticholinergic effects include: dry mouth/throat, dizziness, ocular irritation, blurred vision, conjunctivitis, hoarseness, cough, and taste perversion. There were infrequent reports of skin rash in both the controlled and uncontrolled clinical studies. Post-Marketing Experience Allergic-type reactions such as skin rash, angioedema, including that of the throat, tongue, lips and face, generalized urticaria (including giant urticaria), laryngospasm, and anaphylactic reactions have been reported with ipratropium bromide nasal solution, 0.03% and for other ipratropium bromide containing products, with positive rechallenge in some cases. Additional side effects identified from the published literature and/or post-marketing surveillance on the use of ipratropium bromide containing products (singly or in combination with albuterol), include: urinary retention, prostatic disorders, mydriasis, cases of precipitation or worsening of narrow-angle glaucoma, acute eye pain, wheezing, dryness of the oropharynx, sinusitis, tachycardia, palpitations, pain, edema, gastrointestinal distress (diarrhea, nausea, vomiting), bowel obstruction, constipation, nasal discomfort, throat irritation, hypersensitivity, accommodation disorder, intraocular pressure increased, glaucoma, halo vision, conjunctival hyperaemia, corneal edema, heart rate increased, bronchospasm, pharyngeal edema, gastrointestinal motility disorder, mouth edema, stomatitis, and pruritus. After oral inhalation of ipratropium bromide in patients suffering from COPD/Asthma supraventricular tachycardia and atrial fibrillation have been reported.

CONTRAINDICATIONS Ipratropium bromide nasal solution, 0.03% is contraindicated in patients with a history of hypersensitivity to atropine or its derivatives, or to any of the other ingredients.

DESCRIPTION The active ingredient in ipratropium bromide nasal solution is ipratropium bromide monohydrate. It is an anticholinergic agent chemically described as 8-azoniabicyclo (3.2.1) octane, 3-(3-hydroxy-1-oxo-2-phenylpropoxy)-8-methyl-8-(1-methylethyl)-, bromide, monohydrate ( endo, syn )-, ( + )-: a synthetic quaternary ammonium compound, chemically related to atropine. The structural formula is: ipratropium bromide C 20 H 30 BrNO 3 •H 2 O monohydrate Mol. Wt. 430.4 Ipratropium bromide is a white to off-white, crystalline substance. It is freely soluble in lower alcohols and water, existing in an ionized state in aqueous solutions, and relatively insoluble in non-polar media. Ipratropium bromide nasal solution, 0.03% is a metered-dose, manual pump spray unit which delivers 21 mcg (70 mcL) ipratropium bromide per spray on an anhydrous basis in an isotonic, aqueous solution. It also contains the following inactive ingredients: benzalkonium chloride, edetate disodium, purified water and sodium chloride. Hydrochloric acid and/or sodium hydroxide may be added to adjust the pH to 4.5 to 4.9. Each bottle contains 345 sprays.

DOSAGE AND ADMINISTRATION The recommended dose of ipratropium bromide nasal solution, 0.03% is two sprays (42 mcg) per nostril two or three times daily (total dose 168 to 252 mcg/day) for the symptomatic relief of rhinorrhea associated with allergic and nonallergic perennial rhinitis in adults and children age 6 years and older. Optimum dosage varies with the response of the individual patient. Initial pump priming requires seven sprays of the pump. If used regularly as recommended, no further priming is required. If not used for more than 24 hours, the pump will require two sprays, or if not used for more than seven days, the pump will require seven sprays to reprime. Avoid spraying into eyes.

INDICATIONS AND USAGE Ipratropium bromide nasal solution, 0.03% is indicated for the symptomatic relief of rhinorrhea associated with allergic and nonallergic perennial rhinitis in adults and children age 6 years and older. Ipratropium bromide nasal solution, 0.03% does not relieve nasal congestion, sneezing, or postnasal drip associated with allergic or nonallergic perennial rhinitis.

WARNINGS Immediate hypersensitivity reactions may occur after administration of ipratropium bromide, as demonstrated by urticaria, angioedema, rash, bronchospasm, anaphylaxis, and oropharyngeal edema. If such a reaction occurs, therapy with ipratropium bromide nasal solution 0.03% should be stopped at once and alternative treatment should be considered.

OVERDOSAGE Acute overdosage by intranasal administration is unlikely since ipratropium bromide is not well absorbed systemically after intranasal or oral administration. Following administration of a 20 mg oral dose (equivalent to ingesting more than four bottles of ipratropium bromide nasal solution, 0.03%) to 10 male volunteers, no change in heart rate or blood pressure was noted. Following a 2 mg intravenous infusion over 15 minutes to the same 10 male volunteers, plasma ipratropium concentrations of 22 to 45 ng/mL were observed (>100 times the concentrations observed following intranasal administration). Following intravenous infusion these 10 volunteers had a mean increase of heart rate of 50 bpm and less than 20 mmHg change in systolic or diastolic blood pressure at the time of peak ipratropium levels.

Drug Interactions No controlled clinical trials were conducted to investigate potential drug-drug interactions. There is potential for an additive interaction with other concomitantly administered medications with anticholinergic properties, including ipratropium bromide for oral inhalation.

CLINICAL PHARMACOLOGY Mechanism of Action Ipratropium bromide is an anticholinergic (parasympatholytic) agent which, based on animal studies, appears to inhibit vagally-mediated reflexes by antagonizing the action of acetylcholine, the transmitter agent released at the neuromuscular junctions in the lung. In humans, ipratropium bromide has antisecretory properties and, when applied locally, inhibits secretions from the serous and seromucous glands lining the nasal mucosa. Ipratropium bromide is a quaternary amine that minimally crosses the nasal and gastrointestinal membranes and the blood-brain barrier, resulting in a reduction of the systemic anticholinergic effects (e.g., neurologic, ophthalmic, cardiovascular, and gastrointestinal effects) that are seen with tertiary anticholinergic amines. Pharmacokinetic s Absorption Ipratropium bromide is poorly absorbed into the systemic circulation following oral administration (2 to 3%). Less than 20% of an 84 mcg per nostril dose was absorbed from the nasal mucosa of normal volunteers, induced-cold patients, or perennial rhinitis patients. Distribution Ipratropium bromide is minimally bound (0 to 9% in vitro ) to plasma albumin and α 1 -acid glycoprotein. Its blood/plasma concentration ratio was estimated to be about 0.89. Studies in rats have shown that ipratropium bromide does not penetrate the blood-brain barrier. Metabolism Ipratropium bromide is partially metabolized to ester hydrolysis products, tropic acid and tropane. These metabolites appear to be inactive based on in vitro receptor affinity studies using rat brain tissue homogenates. Elimination After intravenous administration of 2 mg ipratropium bromide to 10 healthy volunteers, the terminal half-life of ipratropium was approximately 1.6 hours. The total body clearance and renal clearance were estimated to be 2,505 and 1,019 mL/min, respectively. The amount of the total dose excreted unchanged in the urine (Ae) within 24 hours was approximately one-half of the administered dose. Pediatrics Following administration of 42 mcg of ipratropium bromide per nostril two or three times a day in perennial rhinitis patients 6 to 18 years old, the mean amounts of the total dose excreted unchanged in the urine (8.6 to 11.1%) were higher than those reported in adult volunteers or adult perennial rhinitis patients (3.7 to 5.6%). Plasma ipratropium concentrations were relatively low (ranging from undetectable up to 0.49 ng/mL). No correlation of the amount of the total dose excreted unchanged in the urine (Ae) with age or gender was observed in the pediatric population. Special Populations Gender does not appear to influence the absorption or excretion of nasally administered ipratropium bromide. The pharmacokinetics of ipratropium bromide have not been studied in patients with hepatic or renal insufficiency or in the elderly. Drug-Drug Interactions No specific pharmacokinetic studies were conducted to evaluate potential drug-drug interactions. Pharmacodynamics In two single-dose trials (n=17), doses up to 336 mcg of ipratropium bromide did not significantly affect pupillary diameter, heart rate, or systolic/diastolic blood pressure. Similarly, in patients with induced-colds, ipratropium bromide nasal solution, 0.06% (84 mcg/nostril four times a day), had no significant effects on pupillary diameter, heart rate or systolic/diastolic blood pressure. Two nasal provocation trials in perennial rhinitis patients (n=44) using ipratropium bromide nasal solution showed a dose dependent increase in inhibition of methacholine induced nasal secretion with an onset of action within 15 minutes (time of first observation). Controlled clinical trials demonstrated that intranasal fluorocarbon-propelled ipratropium bromide does not alter physiologic nasal functions (e.g., sense of smell, ciliary beat frequency, mucociliary clearance, or the air conditioning capacity of the nose).

Pharmacodynamics In two single-dose trials (n=17), doses up to 336 mcg of ipratropium bromide did not significantly affect pupillary diameter, heart rate, or systolic/diastolic blood pressure. Similarly, in patients with induced-colds, ipratropium bromide nasal solution, 0.06% (84 mcg/nostril four times a day), had no significant effects on pupillary diameter, heart rate or systolic/diastolic blood pressure. Two nasal provocation trials in perennial rhinitis patients (n=44) using ipratropium bromide nasal solution showed a dose dependent increase in inhibition of methacholine induced nasal secretion with an onset of action within 15 minutes (time of first observation). Controlled clinical trials demonstrated that intranasal fluorocarbon-propelled ipratropium bromide does not alter physiologic nasal functions (e.g., sense of smell, ciliary beat frequency, mucociliary clearance, or the air conditioning capacity of the nose).

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Carcinogenesis, Mutagenesis, Impairment of Fertility Two-year oral carcinogenicity studies in rats and mice have revealed no carcinogenic activity at doses up to 6 mg/kg. This dose corresponds in rats and mice to approximately 190 and 95 times the maximum recommended daily intranasal dose in adults, respectively, and approximately 110 and 55 times the maximum recommended daily intranasal dose in children, respectively, on a mg/m 2 basis. Results of various mutagenicity studies (Ames test, mouse dominant lethal test, mouse micronucleus test, and chromosome aberration of bone marrow in Chinese hamsters) were negative. Fertility of male or female rats at oral doses up to 50 mg/kg (approximately 1,600 times the maximum recommended daily intranasal dose in adults on a mg/m 2 basis) was unaffected by ipratropium bromide administration. At an oral dose of 500 mg/kg (approximately 16,000 times the maximum recommended daily intranasal dose in adults on a mg/m 2 basis), ipratropium bromide produced a decrease in the conception rate.

ANDA076156

Ipratropium Bromide

Ipratropium Bromide

16714-526

HUMAN PRESCRIPTION DRUG

NASAL

PRINCIPAL DISPLAY PANEL - 0.03 percent Bottle Label Northstar Rx LLC NDC 16714-526-01 Ipratropium Bromide Nasal Solution, 0.03% Nasal Spray 345 Metered Sprays 21 mcg/spray Rx Only

Information for Patients Patients should be advised that temporary blurring of vision, precipitation or worsening of narrow-angle glaucoma, mydriasis, increased intraocular pressure, acute eye pain or discomfort, visual halos or colored images in association with red eyes from conjunctival and corneal congestion may result if ipratropium bromide nasal solution, 0.03% comes into direct contact with the eyes. Patients should be instructed to avoid spraying ipratropium bromide nasal solution, 0.03% in or around their eyes. Patients who experience eye pain, blurred vision, excessive nasal dryness, or episodes of nasal bleeding should be instructed to contact their doctor. To ensure proper dosing, patients should be advised not to alter the size of the nasal spray opening. Patients should be reminded to carefully read and follow the accompanying Patient's Instructions for Use. Since dizziness, accommodation disorder, mydriasis, and blurred vision may occur with use of ipratropium bromide nasal solution, 0.03%, patients should be cautioned about engaging in activities requiring balance and visual acuity such as driving a car or operating appliances, machinery, etc.

Clinical Trials The clinical trials for ipratropium bromide nasal solution, 0.03% were conducted in patients with nonallergic perennial rhinitis (NAPR) and in patients with allergic perennial rhinitis (APR). APR patients were those who experienced symptoms of nasal hypersecretion and nasal congestion or sneezing when exposed to specific perennial allergens (e.g., dust mites, molds) and were skin test positive to these allergens. NAPR patients were those who experienced symptoms of nasal hypersecretion and nasal congestion or sneezing throughout the year, but were skin test negative to common perennial allergens. In four controlled, four- and eight-week comparisons of ipratropium bromide nasal solution, 0.03% (42 mcg per nostril, two or three times daily) with its vehicle, in patients with allergic or nonallergic perennial rhinitis, there was a statistically significant decrease in the severity and duration of rhinorrhea in the ipratropium bromide group throughout the entire study period. An effect was seen as early as the first day of therapy. There was no effect of ipratropium bromide nasal solution, 0.03% on degree of nasal congestion, sneezing, or postnasal drip. The response to ipratropium bromide nasal solution, 0.03% did not appear to be affected by the type of perennial rhinitis (NAPR or APR), age, or gender. No controlled clinical trials directly compared the efficacy of BID versus TID treatment.

Labor and Delivery The effect of ipratropium bromide on labor and delivery is unknown

Nursing Mothers It is known that some ipratropium bromide is systemically absorbed following nasal administration; however the portion which may be excreted in human milk is unknown. Because lipid-insoluble quaternary cations pass into breast milk, caution should be exercised when ipratropium bromide nasal solution, 0.03% is administered to a nursing mother.

Pediatric Use The safety of ipratropium bromide nasal solution, 0.03% at a dose of two sprays (42 mcg) per nostril two or three times daily (total dose 168 to 252 mcg/day) has been demonstrated in 77 pediatric patients 6 to12 years of age in placebo-controlled, 4-week trials and in 55 pediatric patients in active-controlled, 6 month trials. The effectiveness of ipratropium bromide nasal solution, 0.03% for the treatment of rhinorrhea associated with allergic and nonallergic perennial rhinitis in this pediatric age group is based on an extrapolation of the demonstrated efficacy of ipratropium bromide nasal solution, 0.03% in adults with these conditions and the likelihood that the disease course, pathophysiology, and the drug's effects are substantially similar to that of the adults. The recommended dose for the pediatric population is based on within and cross-study comparisons of the efficacy of ipratropium bromide nasal solution, 0.03% in adults and pediatric patients and on its safety profile in both adults and pediatric patients. The safety and effectiveness of ipratropium bromide nasal solution, 0.03% in patients under 6 years of age have not been established.

Pregnancy Teratogenic Effects Pregnancy Category B. There are no adequate and well-controlled studies for ipratropium bromide nasal solution, 0.03% in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed. Oral reproduction studies were performed at doses of 10 mg/kg in mice, 1,000 mg/kg in rats and 125 mg/kg in rabbits. These doses correspond, in each species, respectively, to approximately 160, 32,000, and 8,000 times the maximum recommended daily intranasal dose (MRDID) in adults on a mg/m 2 basis. Inhalation reproduction studies were conducted in rats and rabbits at doses of 1.5 and 1.8 mg/kg, respectively, (approximately 50 and 120 times, respectively, the (MRDID)in adults on a mg/m 2 basis). These studies demonstrated no evidence of teratogenic effects as a result of ipratropium bromide. At oral doses 90 mg/kg and above in rats (approximately 2,900 times the (MRDID) in adults on a mg/m 2 basis) embryotoxicity was observed as increased resorption. This effect is not considered relevant to human use due to the large doses at which it was observed and the difference in route of administration. However, no adequate or well controlled studies have been conducted in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed.

Teratogenic Effects Pregnancy Category B. There are no adequate and well-controlled studies for ipratropium bromide nasal solution, 0.03% in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed. Oral reproduction studies were performed at doses of 10 mg/kg in mice, 1,000 mg/kg in rats and 125 mg/kg in rabbits. These doses correspond, in each species, respectively, to approximately 160, 32,000, and 8,000 times the maximum recommended daily intranasal dose (MRDID) in adults on a mg/m 2 basis. Inhalation reproduction studies were conducted in rats and rabbits at doses of 1.5 and 1.8 mg/kg, respectively, (approximately 50 and 120 times, respectively, the (MRDID)in adults on a mg/m 2 basis). These studies demonstrated no evidence of teratogenic effects as a result of ipratropium bromide. At oral doses 90 mg/kg and above in rats (approximately 2,900 times the (MRDID) in adults on a mg/m 2 basis) embryotoxicity was observed as increased resorption. This effect is not considered relevant to human use due to the large doses at which it was observed and the difference in route of administration. However, no adequate or well controlled studies have been conducted in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed.

HOW SUPPLIED Ipratropium bromide nasal solution, 0.03% is supplied in a white high density polyethylene (HDPE) bottle fitted with a metered nasal spray pump, a green safety clip to prevent accidental discharge of the spray, and a clear plastic dust cap (NDC 16714-526-01). It contains 31.1g of product formulation, 345 sprays, each delivering 21 mcg (70 mcL) of ipratropium bromide per spray, or 28 days of therapy at the maximum recommended dose (two sprays per nostril three times a day). Store tightly closed at 20º to 25ºC (68º to 77ºF) [See USP Controlled Room Temperature]. Avoid freezing. Keep out of reach of children. Do not spray in the eyes. Address medical inquiries to Northstar Rx LLC at 1-800-206-7821 Patients should be reminded to read and follow the accompanying “Patient’s Instructions for Use”, which should be dispensed with the product. Manufactured for: Manufactured by: Northstar Rx LLC Apotex Inc. Memphis, TN 38141 Toronto, Ontario Canada M9L 1T9 December 2021

General 1. Effects Seen with Anticholinergic Drugs : Ipratropium bromide nasal solution 0.03% should be used with caution in patients with narrow-angle glaucoma, prostatic hyperplasia, or bladder neck obstruction, particularly if they are receiving an anticholinergic by another route. 2. Use in Hepatic or Renal Disease : Ipratropium bromide nasal solution 0.03% has not been studied in patients with hepatic or renal insufficiency. It should be used with caution in those patient populations.

PRECAUTIONS General 1. Effects Seen with Anticholinergic Drugs : Ipratropium bromide nasal solution 0.03% should be used with caution in patients with narrow-angle glaucoma, prostatic hyperplasia, or bladder neck obstruction, particularly if they are receiving an anticholinergic by another route. 2. Use in Hepatic or Renal Disease : Ipratropium bromide nasal solution 0.03% has not been studied in patients with hepatic or renal insufficiency. It should be used with caution in those patient populations. Information for Patients Patients should be advised that temporary blurring of vision, precipitation or worsening of narrow-angle glaucoma, mydriasis, increased intraocular pressure, acute eye pain or discomfort, visual halos or colored images in association with red eyes from conjunctival and corneal congestion may result if ipratropium bromide nasal solution, 0.03% comes into direct contact with the eyes. Patients should be instructed to avoid spraying ipratropium bromide nasal solution, 0.03% in or around their eyes. Patients who experience eye pain, blurred vision, excessive nasal dryness, or episodes of nasal bleeding should be instructed to contact their doctor. To ensure proper dosing, patients should be advised not to alter the size of the nasal spray opening. Patients should be reminded to carefully read and follow the accompanying Patient's Instructions for Use. Since dizziness, accommodation disorder, mydriasis, and blurred vision may occur with use of ipratropium bromide nasal solution, 0.03%, patients should be cautioned about engaging in activities requiring balance and visual acuity such as driving a car or operating appliances, machinery, etc. Drug Interactions No controlled clinical trials were conducted to investigate potential drug-drug interactions. There is potential for an additive interaction with other concomitantly administered medications with anticholinergic properties, including ipratropium bromide for oral inhalation. Carcinogenesis, Mutagenesis, Impairment of Fertility Two-year oral carcinogenicity studies in rats and mice have revealed no carcinogenic activity at doses up to 6 mg/kg. This dose corresponds in rats and mice to approximately 190 and 95 times the maximum recommended daily intranasal dose in adults, respectively, and approximately 110 and 55 times the maximum recommended daily intranasal dose in children, respectively, on a mg/m 2 basis. Results of various mutagenicity studies (Ames test, mouse dominant lethal test, mouse micronucleus test, and chromosome aberration of bone marrow in Chinese hamsters) were negative. Fertility of male or female rats at oral doses up to 50 mg/kg (approximately 1,600 times the maximum recommended daily intranasal dose in adults on a mg/m 2 basis) was unaffected by ipratropium bromide administration. At an oral dose of 500 mg/kg (approximately 16,000 times the maximum recommended daily intranasal dose in adults on a mg/m 2 basis), ipratropium bromide produced a decrease in the conception rate. Pregnancy Teratogenic Effects Pregnancy Category B. There are no adequate and well-controlled studies for ipratropium bromide nasal solution, 0.03% in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed. Oral reproduction studies were performed at doses of 10 mg/kg in mice, 1,000 mg/kg in rats and 125 mg/kg in rabbits. These doses correspond, in each species, respectively, to approximately 160, 32,000, and 8,000 times the maximum recommended daily intranasal dose (MRDID) in adults on a mg/m 2 basis. Inhalation reproduction studies were conducted in rats and rabbits at doses of 1.5 and 1.8 mg/kg, respectively, (approximately 50 and 120 times, respectively, the (MRDID)in adults on a mg/m 2 basis). These studies demonstrated no evidence of teratogenic effects as a result of ipratropium bromide. At oral doses 90 mg/kg and above in rats (approximately 2,900 times the (MRDID) in adults on a mg/m 2 basis) embryotoxicity was observed as increased resorption. This effect is not considered relevant to human use due to the large doses at which it was observed and the difference in route of administration. However, no adequate or well controlled studies have been conducted in pregnant women. Because animal reproduction studies are not always predictive of human response, ipratropium bromide nasal solution, 0.03% should be used during pregnancy only if clearly needed. Labor and Delivery The effect of ipratropium bromide on labor and delivery is unknown Nursing Mothers It is known that some ipratropium bromide is systemically absorbed following nasal administration; however the portion which may be excreted in human milk is unknown. Because lipid-insoluble quaternary cations pass into breast milk, caution should be exercised when ipratropium bromide nasal solution, 0.03% is administered to a nursing mother. Pediatric Use The safety of ipratropium bromide nasal solution, 0.03% at a dose of two sprays (42 mcg) per nostril two or three times daily (total dose 168 to 252 mcg/day) has been demonstrated in 77 pediatric patients 6 to12 years of age in placebo-controlled, 4-week trials and in 55 pediatric patients in active-controlled, 6 month trials. The effectiveness of ipratropium bromide nasal solution, 0.03% for the treatment of rhinorrhea associated with allergic and nonallergic perennial rhinitis in this pediatric age group is based on an extrapolation of the demonstrated efficacy of ipratropium bromide nasal solution, 0.03% in adults with these conditions and the likelihood that the disease course, pathophysiology, and the drug's effects are substantially similar to that of the adults. The recommended dose for the pediatric population is based on within and cross-study comparisons of the efficacy of ipratropium bromide nasal solution, 0.03% in adults and pediatric patients and on its safety profile in both adults and pediatric patients. The safety and effectiveness of ipratropium bromide nasal solution, 0.03% in patients under 6 years of age have not been established.