FLUTICASONE PROPIONATE AND SALMETEROL

LABA monotherapy increases the risk of serious asthma-related events. ( 5.1 ) Do not initiate in acutely deteriorating asthma or COPD. Do not use to treat acute symptoms. ( 5.2 ) Do not use in combination with an additional medicine containing a LABA because of risk of overdose. ( 5.3 ) Candida albicans infection of the mouth and pharynx may occur. Monitor patients periodically. Advise the patient to rinse his/her mouth with water without swallowing after inhalation to help reduce the risk. ( 5.4 ) Increased risk of pneumonia in patients with COPD. Monitor patients for signs and symptoms of pneumonia. ( 5.5 ) Potential worsening of infections (e.g., existing tuberculosis; fungal, bacterial, viral, or parasitic infections; ocular herpes simplex). Use with caution in patients with these infections. More serious or even fatal course of chickenpox or measles can occur in susceptible patients. ( 5.6 ) Risk of impaired adrenal function when transferring from systemic corticosteroids. Taper patients slowly from systemic corticosteroids if transferring to fluticasone propionate and salmeterol inhalation powder. ( 5.7 ) Hypercorticism and adrenal suppression may occur with very high dosages or at the regular dosage in susceptible individuals. If such changes occur, discontinue fluticasone propionate and salmeterol inhalation powder slowly. ( 5.8 ) If paradoxical bronchospasm occurs, discontinue fluticasone propionate and salmeterol inhalation powder and institute alternative therapy. ( 5.10 ) Use with caution in patients with cardiovascular or central nervous system disorders because of beta-adrenergic stimulation. ( 5.12 ) Assess for decrease in bone mineral density initially and periodically thereafter. ( 5.13 ) Monitor growth of pediatric patients. ( 5.14 ) Glaucoma and cataracts may occur with long-term use of inhaled corticosteroids. Consider referral to an ophthalmologist in patients who develop ocular symptoms or use fluticasone propionate and salmeterol inhalation powder long term. ( 5.15 ) Be alert to eosinophilic conditions, hypokalemia, and hyperglycemia. ( 5.16 , 5.18 ) Use with caution in patients with convulsive disorders, thyrotoxicosis, diabetes mellitus, and ketoacidosis. ( 5.17 ) 5.1 Serious Asthma-Related Events – Hospitalizations, Intubations, Death Use of LABA as monotherapy (without ICS) for asthma is associated with an increased risk of asthma-related death [see Salmeterol Multicenter Asthma Research Trial (SMART)] . Available data from controlled clinical trials also suggest that use of LABA as monotherapy increases the risk of asthma-related hospitalization in pediatric and adolescent patients. These findings are considered a class effect of LABA monotherapy. When LABA are used in fixed-dose combination with ICS, data from large clinical trials do not show a significant increase in the risk of serious asthma-related events (hospitalizations, intubations, death) compared with ICS alone (see Serious Asthma-Related Events with Inhaled Corticosteroid/Long-acting Beta 2 -adrenergic Agonists) . Serious Asthma-Related Events with Inhaled Corticosteroid/Long-acting Beta 2 -adrenergic Agonists Four (4) large, 26-week, randomized, double-blind, active-controlled clinical safety trials were conducted to evaluate the risk of serious asthma-related events when LABA were used in fixed-dose combination with ICS compared with ICS alone in subjects with asthma. Three (3) trials included adult and adolescent subjects aged 12 years and older: 1 trial compared fluticasone propionate/salmeterol inhalation powder with fluticasone propionate inhalation powder [ see Clinical Studies ( 14.1 ) ], 1 trial compared mometasone furoate/formoterol with mometasone furoate, and 1 trial compared budesonide/formoterol with budesonide. The fourth trial included pediatric subjects aged 4 to 11 years and compared fluticasone propionate/salmeterol inhalation powder with fluticasone propionate inhalation powder [ see Clinical Studies ( 14.1 ) ]. The primary safety endpoint for all 4 trials was serious asthma-related events (hospitalizations, intubations, death). A blinded adjudication committee determined whether events were asthma related. The 3 adult and adolescent trials were designed to rule out a risk margin of 2.0, and the pediatric trial was designed to rule out a risk margin of 2.7. Each individual trial met its pre-specified objective and demonstrated non-inferiority of ICS/LABA to ICS alone. A meta-analysis of the 3 adult and adolescent trials did not show a significant increase in risk of a serious asthma-related event with ICS/LABA fixed-dose combination compared with ICS alone (Table 1). These trials were not designed to rule out all risk for serious asthma-related events with ICS/LABA compared with ICS. Table 1: Meta-analysis of Serious Asthma-Related Events in Subjects with Asthma Aged 12 Years and Older ICS/LABA (n = 17,537) Randomized subjects who had taken at least 1 dose of study drug. Planned treatment used for analysis. ICS (n = 17,552) ICS/LABA vs. ICS Hazard Ratio (95% CI) Estimated using a Cox proportional hazards model for time to first event with baseline hazards stratified by each of the 3 trials. Serious asthma-related event Number of subjects with event that occurred within 6 months after the first use of study drug or 7 days after the last date of study drug, whichever date was later. Subjects can have one or more events, but only the first event was counted for analysis. A single, blinded, independent adjudication committee determined whether events were asthma related. Asthma-related death Asthma-related intubation (endotracheal) Asthma-related hospitalization (≥24-hour stay) 116 2 1 115 105 0 2 105 1.10 (0.85, 1.44) ICS = Inhaled Corticosteroid, LABA = Long-acting Beta 2 -adrenergic Agonist. The pediatric safety trial included 6,208 pediatric subjects aged 4 to 11 years who received ICS/LABA (fluticasone propionate/salmeterol inhalation powder) or ICS (fluticasone propionate inhalation powder). In this trial, 27/3,107 (0.9%) subjects randomized to ICS/LABA and 21/3,101 (0.7%) subjects randomized to ICS experienced a serious asthma-related event. There were no asthma-related deaths or intubations. ICS/LABA did not show a significantly increased risk of a serious asthma-related event compared with ICS based on the pre-specified risk margin (2.7), with an estimated hazard ratio of time to first event of 1.29 (95% CI: 0.73, 2.27). Salmeterol Multicenter Asthma Research Trial (SMART) A 28-week, placebo-controlled, U.S. trial that compared the safety of salmeterol with placebo, each added to usual asthma therapy, showed an increase in asthma-related deaths in subjects receiving salmeterol (13/13,176 in subjects treated with salmeterol versus 3/13,179 in subjects treated with placebo; relative risk: 4.37 [95% CI: 1.25, 15.34]). Use of background ICS was not required in SMART. The increased risk of asthma-related death is considered a class effect of LABA monotherapy. 5.2 Deterioration of Disease and Acute Episodes Fluticasone propionate and salmeterol inhalation powder should not be initiated in patients during rapidly deteriorating or potentially life-threatening episodes of asthma or COPD. Fluticasone propionate and salmeterol inhalation powder has not been studied in subjects with acutely deteriorating asthma or COPD. The initiation of fluticasone propionate and salmeterol inhalation powder in this setting is not appropriate. Serious acute respiratory events, including fatalities, have been reported when salmeterol, a component of fluticasone propionate and salmeterol inhalation powder, has been initiated in patients with significantly worsening or acutely deteriorating asthma. In most cases, these have occurred in patients with severe asthma (e.g., patients with a history of corticosteroid dependence, low pulmonary function, intubation, mechanical ventilation, frequent hospitalizations, previous life-threatening acute asthma exacerbations) and in some patients with acutely deteriorating asthma (e.g., patients with significantly increasing symptoms; increasing need for inhaled, short-acting beta 2 -agonists; decreasing response to usual medications; increasing need for systemic corticosteroids; recent emergency room visits; deteriorating lung function). However, these events have occurred in a few patients with less severe asthma as well. It was not possible from these reports to determine whether salmeterol contributed to these events. Increasing use of inhaled, short-acting beta 2 -agonists is a marker of deteriorating asthma. In this situation, the patient requires immediate reevaluation with reassessment of the treatment regimen, giving special consideration to the possible need for replacing the current strength of fluticasone propionate and salmeterol inhalation powder with a higher strength, adding additional ICS, or initiating systemic corticosteroids. Patients should not use more than 1 inhalation twice daily of fluticasone propionate and salmeterol inhalation powder. Fluticasone propionate and salmeterol inhalation powder should not be used for the relief of acute symptoms, i.e., as rescue therapy for the treatment of acute episodes of bronchospasm. Fluticasone propionate and salmeterol inhalation powder has not been studied in the relief of acute symptoms and extra doses should not be used for that purpose. Acute symptoms should be treated with an inhaled, short-acting beta 2 -agonist. When beginning treatment with fluticasone propionate and salmeterol inhalation powder, patients who have been taking oral or inhaled, short-acting beta 2 -agonists on a regular basis (e.g., 4 times a day) should be instructed to discontinue the regular use of these drugs. 5.3 Excessive Use of Fluticasone Propionate and Salmeterol Inhalation Powder and Use with Other Long-acting Beta 2 -agonists Fluticasone propionate and salmeterol inhalation powder should not be used more often than recommended, at higher doses than recommended, or in conjunction with other medicines containing LABA, as an overdose may result. Clinically significant cardiovascular effects and fatalities have been reported in association with excessive use of inhaled sympathomimetic drugs. Patients using fluticasone propionate and salmeterol inhalation powder should not use another medicine containing a LABA (e.g., salmeterol, formoterol fumarate, arformoterol tartrate, indacaterol) for any reason. 5.4 Local Effects of Inhaled Corticosteroids In clinical trials, the development of localized infections of the mouth and pharynx with Candida albicans has occurred in subjects treated with fluticasone propionate and salmeterol inhalation powder. When such an infection develops, it should be treated with appropriate local or systemic (i.e., oral) antifungal therapy while treatment with fluticasone propionate and salmeterol inhalation powder continues, but at times therapy with fluticasone propionate and salmeterol inhalation powder may need to be interrupted. Advise the patient to rinse his/her mouth with water without swallowing following inhalation to help reduce the risk of oropharyngeal candidiasis. 5.5 Pneumonia Physicians should remain vigilant for the possible development of pneumonia in patients with COPD as the clinical features of pneumonia and exacerbations frequently overlap. Lower respiratory tract infections, including pneumonia, have been reported in patients with COPD following the inhaled administration of corticosteroids, including fluticasone propionate and fluticasone propionate and salmeterol inhalation powder. In 2 replicate 1-year trials in 1,579 subjects with COPD, there was a higher incidence of pneumonia reported in subjects receiving fluticasone propionate and salmeterol inhalation powder 250 mcg/50 mcg (7%) than in those receiving salmeterol 50 mcg (3%). The incidence of pneumonia in the subjects treated with fluticasone propionate and salmeterol inhalation powder was higher in subjects older than 65 years (9%) compared with the incidence in subjects younger than 65 years (4%) [see Adverse Reactions ( 6.2 ), Use in Specific Populations ( 8.5 )] . In a 3-year trial in 6,184 subjects with COPD, there was a higher incidence of pneumonia reported in subjects receiving fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg compared with placebo (16% with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg, 14% with fluticasone propionate 500 mcg, 11% with salmeterol 50 mcg, and 9% with placebo). Similar to what was seen in the 1-year trials with fluticasone propionate and salmeterol inhalation powder 250 mcg/50 mcg, the incidence of pneumonia was higher in subjects older than 65 years (18% with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg versus 10% with placebo) compared with subjects younger than 65 years (14% with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg versus 8% with placebo) [ see Adverse Reactions ( 6.2 ), Use in Specific Populations ( 8.5 ) ]. 5.6 Immunosuppression Persons who are using drugs that suppress the immune system are more susceptible to infections than healthy individuals. Chickenpox and measles, for example, can have a more serious or even fatal course in susceptible children or adults using corticosteroids. In such children or adults who have not had these diseases or been properly immunized, particular care should be taken to avoid exposure. How the dose, route, and duration of corticosteroid administration affect the risk of developing a disseminated infection is not known. The contribution of the underlying disease and/or prior corticosteroid treatment to the risk is also not known. If a patient is exposed to chickenpox, prophylaxis with varicella zoster immune globulin (VZIG) may be indicated. If a patient is exposed to measles, prophylaxis with pooled intramuscular immunoglobulin (IG) may be indicated. (See the respective package inserts for complete VZIG and IG prescribing information.) If chickenpox develops, treatment with antiviral agents may be considered. ICS should be used with caution, if at all, in patients with active or quiescent tuberculosis infections of the respiratory tract; systemic fungal, bacterial, viral, or parasitic infections; or ocular herpes simplex. 5.7 Transferring Patients from Systemic Corticosteroid Therapy Particular care is needed for patients who have been transferred from systemically active corticosteroids to ICS because deaths due to adrenal insufficiency have occurred in patients with asthma during and after transfer from systemic corticosteroids to less systemically available ICS. After withdrawal from systemic corticosteroids, a number of months are required for recovery of hypothalamic-pituitary-adrenal (HPA) function. Patients who have been previously maintained on 20 mg or more of prednisone (or its equivalent) may be most susceptible, particularly when their systemic corticosteroids have been almost completely withdrawn. During this period of HPA suppression, patients may exhibit signs and symptoms of adrenal insufficiency when exposed to trauma, surgery, or infection (particularly gastroenteritis) or other conditions associated with severe electrolyte loss. Although fluticasone propionate and salmeterol inhalation powder may control asthma symptoms during these episodes, in recommended doses it supplies less than normal physiological amounts of glucocorticoid systemically and does NOT provide the mineralocorticoid activity that is necessary for coping with these emergencies. During periods of stress or a severe asthma attack, patients who have been withdrawn from systemic corticosteroids should be instructed to resume oral corticosteroids (in large doses) immediately and to contact their physicians for further instruction. These patients should also be instructed to carry a warning card indicating that they may need supplementary systemic corticosteroids during periods of stress or a severe asthma attack. Patients requiring oral corticosteroids should be weaned slowly from systemic corticosteroid use after transferring to fluticasone propionate and salmeterol inhalation powder. Prednisone reduction can be accomplished by reducing the daily prednisone dose by 2.5 mg on a weekly basis during therapy with fluticasone propionate and salmeterol inhalation powder. Lung function (mean forced expiratory volume in 1 second [FEV 1 ] or morning peak expiratory flow [AM PEF]), beta-agonist use, and asthma symptoms should be carefully monitored during withdrawal of oral corticosteroids. In addition, patients should be observed for signs and symptoms of adrenal insufficiency, such as fatigue, lassitude, weakness, nausea and vomiting, and hypotension. Transfer of patients from systemic corticosteroid therapy to fluticasone propionate and salmeterol inhalation powder may unmask allergic conditions previously suppressed by the systemic corticosteroid therapy (e.g., rhinitis, conjunctivitis, eczema, arthritis, eosinophilic conditions). During withdrawal from oral corticosteroids, some patients may experience symptoms of systemically active corticosteroid withdrawal (e.g., joint and/or muscular pain, lassitude, depression) despite maintenance or even improvement of respiratory function. 5.8 Hypercorticism and Adrenal Suppression Fluticasone propionate, a component of fluticasone propionate and salmeterol inhalation powder, will often help control asthma symptoms with less suppression of HPA function than therapeutically equivalent oral doses of prednisone. Since fluticasone propionate is absorbed into the circulation and can be systemically active at higher doses, the beneficial effects of fluticasone propionate and salmeterol inhalation powder in minimizing HPA dysfunction may be expected only when recommended dosages are not exceeded and individual patients are titrated to the lowest effective dose. A relationship between plasma levels of fluticasone propionate and inhibitory effects on stimulated cortisol production has been shown after 4 weeks of treatment with fluticasone propionate inhalation aerosol. Since individual sensitivity to effects on cortisol production exists, physicians should consider this information when prescribing fluticasone propionate and salmeterol inhalation powder. Because of the possibility of significant systemic absorption of ICS in sensitive patients, patients treated with fluticasone propionate and salmeterol inhalation powder should be observed carefully for any evidence of systemic corticosteroid effects. Particular care should be taken in observing patients postoperatively or during periods of stress for evidence of inadequate adrenal response. It is possible that systemic corticosteroid effects such as hypercorticism and adrenal suppression (including adrenal crisis) may appear in a small number of patients who are sensitive to these effects. If such effects occur, fluticasone propionate and salmeterol inhalation powder should be reduced slowly, consistent with accepted procedures for reducing systemic corticosteroids, and other treatments for management of asthma symptoms should be considered. 5.9 Drug Interactions with Strong Cytochrome P450 3A4 Inhibitors The use of strong cytochrome P450 3A4 (CYP3A4) inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, ketoconazole, telithromycin) with fluticasone propionate and salmeterol inhalation powder is not recommended because increased systemic corticosteroid and increased cardiovascular adverse effects may occur [ see Drug Interactions ( 7.1 ), Clinical Pharmacology ( 12.3 ) ]. 5.10 Paradoxical Bronchospasm and Upper Airway Symptoms As with other inhaled medicines, fluticasone propionate and salmeterol inhalation powder can produce paradoxical bronchospasm, which may be life threatening. If paradoxical bronchospasm occurs following dosing with fluticasone propionate and salmeterol inhalation powder, it should be treated immediately with an inhaled, short-acting bronchodilator; fluticasone propionate and salmeterol inhalation powder should be discontinued immediately; and alternative therapy should be instituted. Upper airway symptoms of laryngeal spasm, irritation, or swelling, such as stridor and choking, have been reported in patients receiving fluticasone propionate and salmeterol inhalation powder. 5.11 Immediate Hypersensitivity Reactions Immediate hypersensitivity reactions (e.g., urticaria, angioedema, rash, bronchospasm, hypotension), including anaphylaxis, may occur after administration of fluticasone propionate and salmeterol inhalation powder. There have been reports of anaphylactic reactions in patients with severe milk protein allergy after inhalation of powder products containing lactose; therefore, patients with severe milk protein allergy should not use fluticasone propionate and salmeterol inhalation powder [ see Contraindications ( 4 ) ]. 5.12 Cardiovascular and Central Nervous System Effects Excessive beta-adrenergic stimulation has been associated with seizures, angina, hypertension or hypotension, tachycardia with rates up to 200 beats/min, arrhythmias, nervousness, headache, tremor, palpitation, nausea, dizziness, fatigue, malaise, and insomnia [ see Overdosage ( 10.2 ) ]. Therefore, fluticasone propionate and salmeterol inhalation powder, like all products containing sympathomimetic amines, should be used with caution in patients with cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension. Salmeterol, a component of fluticasone propionate and salmeterol inhalation powder, can produce a clinically significant cardiovascular effect in some patients as measured by pulse rate, blood pressure, and/or symptoms. Although such effects are uncommon after administration of salmeterol at recommended doses, if they occur, the drug may need to be discontinued. In addition, beta‑agonists have been reported to produce electrocardiogram (ECG) changes, such as flattening of the T wave, prolongation of the QTc interval, and ST segment depression. The clinical significance of these findings is unknown. Large doses of inhaled or oral salmeterol (12 to 20 times the recommended dose) have been associated with clinically significant prolongation of the QTc interval, which has the potential for producing ventricular arrhythmias. Fatalities have been reported in association with excessive use of inhaled sympathomimetic drugs. 5.13 Reduction in Bone Mineral Density Decreases in bone mineral density (BMD) have been observed with long-term administration of products containing ICS. The clinical significance of small changes in BMD with regard to long-term consequences such as fracture is unknown. Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, postmenopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids), should be monitored and treated with established standards of care. Since patients with COPD often have multiple risk factors for reduced BMD, assessment of BMD is recommended prior to initiating fluticasone propionate and salmeterol inhalation powder and periodically thereafter. If significant reductions in BMD are seen and fluticasone propionate and salmeterol inhalation powder is still considered medically important for that patient’s COPD therapy, use of medicine to treat or prevent osteoporosis should be strongly considered. 2-Year Fluticasone Propionate Trial A 2-year trial in 160 subjects (females aged 18 to 40 years, males 18 to 50) with asthma receiving chlorofluorocarbon (CFC)-propelled fluticasone propionate inhalation aerosol 88 or 440 mcg twice daily demonstrated no statistically significant changes in BMD at any time point (24, 52, 76, and 104 weeks of double-blind treatment) as assessed by dual-energy x-ray absorptiometry at lumbar regions L1 through L4. 3-Year Bone Mineral Density Trial Effects of treatment with fluticasone propionate and salmeterol inhalation powder 250 mcg/50 mcg or salmeterol 50 mcg on BMD at the L 1 -L 4 lumbar spine and total hip were evaluated in 186 subjects with COPD (aged 43 to 87 years) in a 3-year double-blind trial. Of those enrolled, 108 subjects (72 males and 36 females) were followed for the entire 3 years. BMD evaluations were conducted at baseline and at 6-month intervals. Conclusions cannot be drawn from this trial regarding BMD decline in subjects treated with fluticasone propionate and salmeterol inhalation powder versus salmeterol due to the inconsistency of treatment differences across gender and between lumbar spine and total hip. In this trial there were 7 non-traumatic fractures reported in 5 subjects treated with fluticasone propionate and salmeterol inhalation powder and 1 non-traumatic fracture in 1 subject treated with salmeterol. None of the non-traumatic fractures occurred in the vertebrae, hip, or long bones. 3-Year Survival Trial Effects of treatment with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg, fluticasone propionate 500 mcg, salmeterol 50 mcg, or placebo on BMD was evaluated in a subset of 658 subjects (females and males aged 40 to 80 years) with COPD in the 3-year survival trial. BMD evaluations were conducted at baseline and at 48, 108, and 158 weeks. Conclusions cannot be drawn from this trial because of the large number of dropouts (greater than 50%) before the end of the follow-up and the maldistribution of covariates among the treatment groups that can affect BMD. Fracture risk was estimated for the entire population of subjects with COPD in the survival trial (N = 6,184). The probability of a fracture over 3 years was 6.3% for fluticasone propionate and salmeterol inhalation powder, 5.4% for fluticasone propionate, 5.1% for salmeterol, and 5.1% for placebo. 5.14 Effect on Growth Orally inhaled corticosteroids may cause a reduction in growth velocity when administered to pediatric patients. Monitor the growth of pediatric patients receiving fluticasone propionate and salmeterol inhalation powder routinely (e.g., via stadiometry). To minimize the systemic effects of orally inhaled corticosteroids, including fluticasone propionate and salmeterol inhalation powder, titrate each patient’s dosage to the lowest dosage that effectively controls his/her symptoms [ see Dosage and Administration ( 2.1 ), Use in Specific Populations ( 8.4 ) ]. 5.15 Glaucoma and Cataracts Glaucoma, increased intraocular pressure, and cataracts have been reported in patients with asthma and COPD following the long-term administration of ICS, including fluticasone propionate, a component of fluticasone propionate and salmeterol inhalation powder. Consider referral to an ophthalmologist in patients who develop ocular symptoms or use fluticasone propionate and salmeterol inhalation powder long term. Effects of treatment with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg, fluticasone propionate 500 mcg, salmeterol 50 mcg, or placebo on development of cataracts or glaucoma was evaluated in a subset of 658 subjects with COPD in the 3-year survival trial. Ophthalmic examinations were conducted at baseline and at 48, 108, and 158 weeks. Conclusions about cataracts cannot be drawn from this trial because the high incidence of cataracts at baseline (61% to 71%) resulted in an inadequate number of subjects treated with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg who were eligible and available for evaluation of cataracts at the end of the trial (n = 53). The incidence of newly diagnosed glaucoma was 2% with fluticasone propionate and salmeterol inhalation powder 500 mcg/50 mcg, 5% with fluticasone propionate, 0% with salmeterol, and 2% with placebo. 5.16 Eosinophilic Conditions and Churg-Strauss Syndrome In rare cases, patients on inhaled fluticasone propionate, a component of fluticasone propionate and salmeterol inhalation powder, may present with systemic eosinophilic conditions. Some of these patients have clinical features of vasculitis consistent with Churg-Strauss syndrome, a condition that is often treated with systemic corticosteroid therapy. These events usually, but not always, have been associated with the reduction and/or withdrawal of oral corticosteroid therapy following the introduction of fluticasone propionate. Cases of serious eosinophilic conditions have also been reported with other ICS in this clinical setting. Physicians should be alert to eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complications, and/or neuropathy presenting in their patients. A causal relationship between fluticasone propionate and these underlying conditions has not been established. 5.17 Coexisting Conditions Fluticasone propionate and salmeterol inhalation powder, like all medicines containing sympathomimetic amines, should be used with caution in patients with convulsive disorders or thyrotoxicosis and in those who are unusually responsive to sympathomimetic amines. Doses of the related beta 2 -adrenoceptor agonist albuterol, when administered intravenously, have been reported to aggravate preexisting diabetes mellitus and ketoacidosis. 5.18 Hypokalemia and Hyperglycemia Beta-adrenergic agonist medicines may produce significant hypokalemia in some patients, possibly through intracellular shunting, which has the potential to produce adverse cardiovascular effects [see Clinical Pharmacology ( 12.2 )] . The decrease in serum potassium is usually transient, not requiring supplementation. Clinically significant changes in blood glucose and/or serum potassium were seen infrequently during clinical trials with fluticasone propionate and salmeterol inhalation powder at recommended doses.