1.Efficacy and safety of salmeterol/fluticasone compared with montelukast alone (or add-on therapy to fluticasone) in the treatment of bronchial asthma in children and adolescents: a systematic review and meta-analysis.
Xiao-Jian ZHOU ; Zhen QIN ; Jiao LU ; Jian-Guo HONG
Chinese Medical Journal 2021;134(24):2954-2961
BACKGROUND:
Despite the recommendation of inhaled corticosteroids (ICSs) plus long-acting beta 2-agonist (LABA) and leukotriene receptor antagonist (LTRA) or ICS/LTRA as stepwise approaches in asthmatic children, there is a lack of published systematic review comparing the efficacy and safety of the two therapies in children and adolescents aged 4 to 18 years. This study aimed to compare the safety and efficacy of salmeterol/fluticasone (SFC) vs. montelukast (MON), or combination of montelukast and fluticasone (MFC) in children and adolescents aged 4 to 18 years with bronchial asthma.
METHODS:
A systematic search was conducted in MEDLINE, EMBASE, the Cochrane Library, China BioMedical Literature Database, Chinese National Knowledge Infrastructure, VIP Database for Chinese Technical Periodical, and Wanfang for randomized controlled trials (RCTs) published from inception to May 24, 2021. Interventions are as follows: SFC vs. MON, or combination of MFC, with no limitation of dosage or duration. Primary and secondary outcome measures were as follows: the primary outcome of interest was the risk of asthma exacerbation. Secondary outcomes included risk of hospitalization, pulmonary function, asthma control level, quality of life, and adverse events (AEs). A random-effects (I2 ≥ 50%) or fixed-effects model (I2 < 50%) was used to calculate pooled effect estimates, comparing the outcomes between the intervention and control groups where feasible.
RESULTS:
Of the 1006 articles identified, 21 studies met the inclusion criteria with 2643 individuals; two were at low risk of bias. As no primary outcomes were similar after an identical treatment duration in the included studies, meta-analysis could not be performed. However, more studies favored SFC, instead of MON, owing to a lower risk of asthma exacerbation in the SFC group. As for secondary outcome, SFC showed a significant improvement of peak expiratory flow (PEF)%pred after 4 weeks compared with MFC (mean difference [MD]: 5.45; 95% confidence interval [CI]: 1.57-9.34; I2 = 95%; P = 0.006). As for asthma control level, SFC also showed a higher full-controlled level (risk ratio [RR]: 1.51; 95% CI: 1.24-1.85; I2 = 0; P < 0.001) and higher childhood asthma control test score after 4 weeks of treatment (MD: 2.30; 95% CI: 1.39-3.21; I2 = 72%; P < 0.001) compared with MFC.
CONCLUSIONS:
SFC may be more effective than MFC for the treatment of asthma in children and adolescents, especially in improving asthma control level. However, there is insufficient evidence to make firm conclusive statements on the use of SFC or MON in children and adolescents aged 4 to 18 years with asthma. Further research is needed, particularly a combination of good-quality long-term prospective studies and well-designed RCTs.
PROSPERO REGISTRATION NUMBER
CRD42019133156.
Acetates
;
Administration, Inhalation
;
Adolescent
;
Adrenal Cortex Hormones/therapeutic use*
;
Albuterol/therapeutic use*
;
Anti-Asthmatic Agents/therapeutic use*
;
Asthma/drug therapy*
;
Child
;
Cyclopropanes
;
Drug Therapy, Combination
;
Fluticasone/therapeutic use*
;
Humans
;
Quinolines
;
Salmeterol Xinafoate/therapeutic use*
;
Sulfides
2.Systematic review and Meta-analysis on efficacy and safety of Liujunzi Decoction combined with Western medicine for stable chronic obstructive pulmonary disease.
Yi-Ling FAN ; Qing MIAO ; Xing LIAO ; Chang-Zheng FAN ; Mao-Rong FAN ; Qing CAO ; Ning WANG ; Ma QIU-XIAO ; Ya-Ni HAO
China Journal of Chinese Materia Medica 2020;45(22):5331-5343
To systematically review the efficacy and safety of Liujunzi Decoction combined with Western medicine in the treatment of stable chronic obstructive pulmonary disease(COPD). Three English databases and four Chinese databases were systematically searched from the database establishment to April 1, 2020. We screened randomized controlled trial(RCT) according to the pre-determined inclusion and exclusion criteria, then extracted data. Methodological quality of included studies was assessed with Cochrane bias risk evaluation tool. Data were analyzed by using RevMan 5.3. A total of 401 articles were retrieved and finally 17 RCTs were included in this study, involving 1 447 patients, and the overall quality of the included studies was not high. Meta-analysis showed that, in reducing traditional Chinese medicine symptom score, Liujunzi Decoction combined with conventional Western medicine or Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation was superior to conventional Western medicine or Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation alone. In reducing the grade of modified medical research council(mMRC), Liujunzi Decoction combined with Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation was superior to Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation alone. In reducing COPD assessment test(CAT) score, Liujunzi Decoction combined with conventional Western medicine was superior to conventional Western medicine alone. In delaying the decline of forced expiratory volume in one second(FEV_1) or % in the expected value, Liujunzi Decoction combined with conventional Western medicine or Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation was superior to conventional Western medicine or Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation alone. In delaying the decline of ratio of FEV_1 to forced vital capacity(FEV_1/FVC), Liujunzi Decoction combined with conventional Western medicine was superior to conventional Western medicine alone, but there was no statistical difference between Liujunzi Decoction combined with Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation and Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation alone. In reducing acute exacerbation rate, there was no statistical difference between Liujunzi Decoction combined with Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation and Salmeterol Xinafoate and Fluticasone Propionate Powder for Inhalation alone. On the other outcome measures of Liujunzi Decoction combined with other Western medicine, Meta-analysis could not be conducted and conclusions due to the inclusion of only one study. In terms of the occurrence of adverse reactions, some studies did not mention, so the safety of Liujunzi Decoction combined with Wes-tern medicine could not be determined in this paper. Due to the limitations of the quality and quantity of inclu-ded studies, the efficacy of Liujunzi Decoction combined with Western medicine for COPD still needs more high-quality studies for confirmation, and its safety needs to be further verified.
Administration, Inhalation
;
Bronchodilator Agents/therapeutic use*
;
Drug Combinations
;
Drugs, Chinese Herbal
;
Humans
;
Medicine
;
Pulmonary Disease, Chronic Obstructive/drug therapy*
;
Salmeterol Xinafoate/therapeutic use*
3.Add-on Tiotropium in Chinese Patients With Moderate Asthma: A Pooled Subgroup Analysis of MezzoTinA-Asthma 1 and 2
Jiangtao LIN ; Huanying WAN ; Jian KANG ; Qianli MA ; Ping CHEN ; Meiling JIN ; Haoyan WANG ; Shuang LIU ; Qinglin HAO ; Yong LIN ; Lin SU ; Na HU
Allergy, Asthma & Immunology Research 2019;11(4):519-528
PURPOSE: Asthma affects approximately 30 million patients in China; however, tiotropium data for Chinese patients is limited. This study aimed to assess the efficacy and safety of tiotropium in Chinese patients with moderate symptomatic asthma. METHODS: A post hoc subgroup analysis was conducted on 430 Chinese patients pooled from two 24-week, replicate phase 3 trials (NCT01172808 and NCT01172821), in which they received once-daily tiotropium 2.5 µg (Tio R2.5) or 5 µg (Tio R5) (n = 106 or 109, respectively), twice-daily salmeterol 50 µg (Sal 50) (n = 110), or placebo (n = 105), while maintaining inhaled corticosteroids (ICS). The co-primary endpoints assessed in week 24 were forced expiratory volume in 1 second (FEV1) peak0–3h response, trough FEV1 response, and responder rate as assessed using the Asthma Control Questionnaire (ACQ). RESULTS: For both FEV1 peak0–3h responses and trough FEV1 responses, the mean treatment differences were greater for Tio R2.5, Tio R5, and Sal 50 compared with placebo at 0.249 L, 0.234 L, and 0.284 L, and 0.172 L, 0.180 L, and 0.164 L, respectively (P< 0.001). The ACQ responder rate in placebo, Tio R2.5, Tio R5, and Sal 50 was 58.7%, 62.3%, 59.3%, and 69.1%, respectively. Furthermore, 11 (2.6%) of 430 patients had serious adverse events (Tio R5, n = 4; Tio R2.5, n = 1; Sal 50, n = 1; and placebo, n = 5). CONCLUSIONS: Once-daily tiotropium, as add-on to medium-dose ICS, was effective and well tolerated for Chinese patients with moderate symptomatic asthma, consistent with the main analysis.
Adrenal Cortex Hormones
;
Adult
;
Asian Continental Ancestry Group
;
Asthma
;
China
;
Forced Expiratory Volume
;
Humans
;
Salmeterol Xinafoate
;
Tiotropium Bromide
4.Pharmacokinetic characteristics of fluticasone, salmeterol and tiotropium after concurrent inhalation.
Jung SUNWOO ; Su jin RHEE ; SeungHwan LEE ; Sang Won LEE ; Jina JUNG ; Hankil SON ; In Jin JANG
Translational and Clinical Pharmacology 2017;25(2):85-92
Chronic obstructive pulmonary disease (COPD) is a type of progressive, obstructive lung disease characterized by long-term poor airflow. The symptoms of COPD may be relieved and its progression delayed by fluticasone (FTS), salmeterol (SM), and tiotropium (TTP). The aim of this study is to investigate pharmacokinetic (PK) characteristics of inhaled FTS, SM, and TTP after co-administration. An open-label, single-arm, three-period, simple ascending dose study was conducted in 10 healthy male subjects. A single dose of FTS/SM (250/50 µg) and TTP (18 µg) were concomitantly inhaled in period 1, and the dose of each drug was escalated to two- and three-fold in periods 2 and 3, respectively, with a 2-week washout between periods. Activated charcoal was co-administered before and after inhalation to block gastrointestinal absorption. Blood samples for PK analysis were collected up to 24 hours. PK parameters were obtained by non-compartmental analysis. FTS, SM, and TTP rapidly reached maximum plasma concentration after inhalation (0.08–3.00 h, 0.03–0.10 h and 0.03–0.10 h, respectively) and were eliminated with mean half-lives of 9.29–10.44 h, 6.09–12.39 h and 0.25–47.42 h, respectively. PK assessment of the lowest dose of TTP was limited due to relatively low systemic exposure compared to the lower limit of quantification. In conclusion, PK characteristics of FTS, SM, and TTP by pulmonary absorption were evaluated after concurrent inhalation. FTS and SM showed dose-proportional PK profiles between 250–750 µg and 50–150 µg, respectively, while TTP presented dose-proportionality in the early phase exposure between 18-54 µg.
Charcoal
;
Fluticasone*
;
Gastrointestinal Absorption
;
Humans
;
Inhalation*
;
Lung Diseases, Obstructive
;
Male
;
Pharmacokinetics
;
Plasma
;
Pulmonary Disease, Chronic Obstructive
;
Respiratory Tract Absorption
;
Salmeterol Xinafoate*
;
Tiotropium Bromide*
5.Mesenchymal Stem Cells Combined with Budesonide, Almeterol and Azithromycin for the Treatment of Bronchiolitis Obliterans Syndrome after Hematopoietic Stem Cell Transplantation.
Xiao-Pei CAO ; Dong-Mei HAN ; Zhi-Dong WANG ; Xiao-Li ZHENG ; Li DING ; Hong-Min YAN ; Mei XUE ; Ling ZHU ; Jing LIU ; Zi-Kuan GUO ; Heng-Xiang WANG
Journal of Experimental Hematology 2016;24(1):173-177
OBJECTIVETo evaluate the safety and effectiveness of a novel therapeutic regimen for bronchiolitis obliterans sydrome (BOS) affter hematopoietic stem cell transplantation (HSCT).
METHODSSeven patients who had received HSCT and had been diagnosed as BOS were enrolled in this study. They received weekly intravenous injection of umbilical cord-derived mesenchymal stem cells (MSC) at a dose of 1 × 10(6)/kg for 4 weeks. Budesonide was given orally at a daily dose of 0.25 g, and salmeterol was inhaled at a dose of 4.5 µg for 3 times per day. Methylprednisolone was given at a dose of 1 mg/(kg·d) for 2 weeks when respiratory failure occured. The dose of methylprednisolone was tapered to 0.25 mg/(kg·d) after 4 weeks and was adjusted according to the occurrence and severity of chronic graft-versus-host disease (cGVHD).
RESULTSThe therapy was generally safe and no severe acute toxicity was observed. One patient died of heart failure during the treatment, the other 6 patients were alive and the pulmonary function parameters including FEV1, FEV1/FVC, PaO2 and AaDO2 were significantly improved after 6 months as compared with the baseline parameters (P < 0.05).
CONCLUSIONMSC combined with budesonide, almeterol and azithromycin has been confirmed to be generally safe and can reduce the dose of glucocorticoid in treatment of BOS after HSCT.
Azithromycin ; therapeutic use ; Bronchiolitis Obliterans ; therapy ; Budesonide ; therapeutic use ; Combined Modality Therapy ; Graft vs Host Disease ; Hematopoietic Stem Cell Transplantation ; Humans ; Mesenchymal Stem Cell Transplantation ; Methylprednisolone ; administration & dosage ; therapeutic use ; Salmeterol Xinafoate ; therapeutic use
6.Three-month Treatment Response and Exacerbation in Chronic Obstructive Pulmonary Disease.
Jung Su LEE ; Chin Kook RHEE ; Kwang Ha YOO ; Ji Hyun LEE ; Ho Il YOON ; Tae Hyung KIM ; Woo Jin KIM ; JinHwa LEE ; Seong Yong LIM ; Tai Sun PARK ; Jae Seung LEE ; Sei Won LEE ; Sang Do LEE ; Yeon Mok OH
Journal of Korean Medical Science 2015;30(1):54-59
The aim of this study was to investigate relationships between acute exacerbation and Forced Expiratory Volume 1 second (FEV1) improvement after treatment with combined long-acting beta-agonist (LABA) and inhaled corticosteroid (ICS) in patients with chronic obstructive pulmonary disease (COPD). A total of 137 COPD patients were classified as responders or nonresponders according to FEV1 improvement after 3 months of LABA/ICS treatment in fourteen referral hospitals in Korea. Exacerbation occurrence in these two subgroups was compared over a period of 1 yr. Eighty of the 137 COPD patients (58.4%) were classified as responders and 57 (41.6%) as nonresponders. Acute exacerbations occurred in 25 patients (31.3%) in the responder group and in 26 patients (45.6%) in the nonresponder group (P=0.086). FEV1 improvement after LABA/ICS treatment was a significant prognostic factor for fewer acute exacerbations in a multivariate Cox proportional hazard model adjusted for age, sex, FEV1, smoking history, 6 min walk distance, body mass index, exacerbation history in the previous year, and dyspnea scale.Three-month treatment response to LABA/ICS might be a prognostic factor for the occurrence of acute exacerbation in COPD patients.
Adrenal Cortex Hormones/*therapeutic use
;
Adrenergic beta-2 Receptor Agonists/*therapeutic use
;
Bronchodilator Agents/*therapeutic use
;
Budesonide/therapeutic use
;
Drug Therapy, Combination
;
Female
;
Fluticasone/therapeutic use
;
Forced Expiratory Volume/drug effects/*physiology
;
Formoterol Fumarate/therapeutic use
;
Humans
;
Male
;
Pulmonary Disease, Chronic Obstructive/*drug therapy/physiopathology
;
Recurrence
;
Republic of Korea
;
Salmeterol Xinafoate/therapeutic use
;
Smoking
;
Spirometry
;
Treatment Outcome
7.Efficacy on chronic obstructive pulmonary disease at stable stage treated with cutting method and western medication.
Jian-hua XU ; Bin XU ; Yan-qing DENG
Chinese Acupuncture & Moxibustion 2014;34(10):951-955
OBJECTIVETo compare the difference in clinical efficacy on chronic obstructive pulmonary disease (COPD) at stable stage in the patients among the combined therapy of cutting method and western medication (combined therapy), simple cutting method and simple western medication.
METHODSOne hundred and twenty cases of COPD were randomized into three groups, 40 cases in each one. In the cutting method group, for excessive phlegm pattern/syndrome, Feishu (BL 13), Danzhong (CV 17), Dingchuan (EX-B 1) and Yuji (LU 10) were selected as the main acupoints, and Lieque (LU 7) and Pianli (LI 6) were as the supplementary acupoints. For the pattern/syndrome of failure to consolidate kidney primary, Shenshu (BL 23), Pishu (BL 20), Guanyuan (CV 4) and Yuji (LU 10) were selected as main acupoints, and Jueyinshu (BL 14) and Zusanli (ST 36) were as the supplementary acupoint. Three acupoints were selected alternatively in each treatment and the cutting method was applied once every 10 days. Three treatments made one session. Two sessions of treatment were required. In the western medication group, salbutamol sulfate aerosol, one press (200 μg/press) was used each night, as well as salmeterol xinafoate and fluticasone propionate powder for inhalation, one inhalation each night. The treatment of 1 month made one session. Two sessions were required. In the combined therapy group, the cutting method and western medication were applied in combination. The results of clinical symptom score, lung function test, arterial blood gas analysis, degree of inflation as well as clinical efficacy were observed before and after treatment in each group.
RESULTSExcept the degree of lung inflation, the clinical symptom score, indices of lung function test, partial pressure of arterial blood gas (PaO2) and partial pressure of carbon dioxide (PaCO2) were all obviously improved after treatment as compared with those before treatment in each group (all P<0.05). They were apparently improved after treatment in the combined therapy group and the cutting method group as compared with those in the western medication group (all P<0.05). The total effective rate was 77.5% (31/40) in the combined therapy group and was 75.0% (30/40) in the cutting method group, both better than 60.0% (24/40) in the western medication group (both P<0.05).
CONCLUSIONThe simple cutting method based on syndrome differentiation and the combined therapy with western medication achieve the superior efficacy on COPD at stable stage as compared with the simple western medication. The effect mechanism is possibly related to the improvement of bronchial airway function through constant acupoint stimulation.
Acupuncture Points ; Acupuncture Therapy ; Aged ; Albuterol ; administration & dosage ; analogs & derivatives ; Androstadienes ; administration & dosage ; Combined Modality Therapy ; Female ; Fluticasone ; Humans ; Lung ; physiopathology ; Male ; Middle Aged ; Pulmonary Disease, Chronic Obstructive ; drug therapy ; physiopathology ; therapy ; Salmeterol Xinafoate ; Treatment Outcome
8.Salmeterol/fluticasone treatment reduces circulating C-reactive protein level in patients with stable chronic obstructive pulmonary disease.
Yong-Jiang TANG ; Ke WANG ; Tao YUAN ; Ting QIU ; Jun XIAO ; Qun YI ; Yu-Lin FENG
Chinese Medical Journal 2010;123(13):1652-1657
BACKGROUNDEvidence suggests that systemic inflammation may play an important role in the progression and morbidity of chronic obstructive pulmonary disease. It remains controversial whether inhaled corticosteroid in combination with a long-acting beta(2)-adrenoceptor agonist can attenuate systemic inflammation. We evaluated the effect of salmeterol/fluticasone propionate on circulating C-reactive protein level in stable chronic obstructive pulmonary disease patients.
METHODSAn open-label clinical trial was conducted to recruit 122 outpatients with stable moderate-to-severe chronic obstructive pulmonary disease from department of respiratory medicine in two teaching hospitals between June 2007 and March 2008. Patients were randomized into two groups (1:1) to receive either the combination of 50 microg salmeterol and 500 microg fluticasone twice daily (n = 61), or the combination of 206 microg albuterol and 36 microg ipratropium q.i.d (n = 61) over 6 months. Circulating C-reactive protein concentrations were measured before randomization and during the follow-up. The efficacy of treatment was also assessed by spirometry, as well as health status and dyspnea score at baseline and after 6-month treatment.
RESULTSBaseline characteristics of two groups were similar. Compared with ipratropium/albuterol, the combination of salmeterol/fluticasone significantly reduced circulating level of C-reactive protein (-1.73 vs. 0.08 mg/L, respectively, P < 0.05) after 6-month treatment. Forced expiratory volume in one second (FEV(1)) and health status also improved significantly in salmeterol/fluticasone group compared with ipratropium/albuterol. Salmeterol/fluticasone treatment subjects who had a decrease of circulating C-reactive protein level had a significant improvement in FEV(1) and St George's Respiratory Questionnaire total scores compared with those who did not (185 vs. 83 ml and -5.71 vs. -1.79 units, respectively, both P < 0.01).
CONCLUSIONSalmeterol/fluticasone treatment reduced circulating C-reactive protein concentration in clinically stable moderate-to-severe chronic obstructive pulmonary disease patients after 6-month treatment.
Albuterol ; analogs & derivatives ; therapeutic use ; Androstadienes ; therapeutic use ; C-Reactive Protein ; metabolism ; Female ; Fluticasone ; Humans ; Male ; Middle Aged ; Pulmonary Disease, Chronic Obstructive ; drug therapy ; metabolism ; Salmeterol Xinafoate ; Treatment Outcome
9.Comparison for the Effects of Triple Therapy with Salmeterol/Fluticasone Propionate and Tiotropium Bromide versus Individual Components in Patients of Severe COPD Combined with Bronchial Hyperresponsiveness.
Ji Youn SOHN ; So Ri KIM ; Seoung Ju PARK ; Heung Bum LEE ; Yong Chul LEE ; Yang Keun RHEE
Tuberculosis and Respiratory Diseases 2009;67(6):536-544
BACKGROUND: A combination of salmeterol and fluticasone propionate (SFC) and tiotropium bromide (TIO) is commonly prescribed for COPD patients but there is little data on their effectiveness, particularly in COPD patients with bronchial hyperresponsiveness. This study compared the spirometric improvement based on the change in FEV1, FEV1/FVC, and IC as well as the clinical outcomes of the therapeutic strategies with SFC and TIO versus the individual components in patients with severe COPD and bronchial hyperresponsiveness. METHODS: This study examined the spirometric data and clinical outcomes of 214 patients with COPD and hyperresponsiveness, who were divided into three groups according to the therapeutic regimen (TIO only, SFC only, and a triple therapy regimen). RESULTS: All regimen groups showed early improvement in the FEV1 and IC (at 3- and 6 months after treatment). However, long-term beneficial effects were observed only in the SFC group (at 24 months after treatment). However, these beneficial effects decreased after a 36-month follow up. In all spirometric results, the 12-, 24-, and 36-months data showed a similar degree of improvement in the three groups. The triple therapy group showed higher St. George's Respiratory Questionnaire scores and lower acute exacerbations and hospitalization. CONCLUSION: SFC can be a more important component in the pharmacological treatment of severe COPD patients with hyperresponsiveness than TIO, particularly in the spirometric and clinical outcomes.
Albuterol
;
Androstadienes
;
Diethylpropion
;
Drug Therapy, Combination
;
Follow-Up Studies
;
Hospitalization
;
Humans
;
Pulmonary Disease, Chronic Obstructive
;
Surveys and Questionnaires
;
Scopolamine Derivatives
;
Treatment Outcome
;
Fluticasone
;
Tiotropium Bromide
;
Salmeterol Xinafoate
10.Successful pharmacotherapy for asthma exacerbation in an asthmatic patient with long QT syndrome.
Hyun Kuk KIM ; Dong Keun CHO ; Woo Jun LEE ; Dae Seong MYUNG ; Eui Ryoung HAN ; Inseon S CHOI ; Youngil I KOH
Korean Journal of Medicine 2009;77(Suppl 1):S249-S253
beta -Blockers can cause bronchospasm in asthma. beta 2-agonists prolong the QT interval and alter the clinical course of long QT syndrome (LQTS). We report a case of asthma exacerbation treated cautiously with beta 2-agonists in a patient with LQTS, while LQTS was controlled with low-dose beta 1-antagonists. A 31-year-old woman with LQTS visited the emergency room for asthma exacerbation. FEV1 was 0.5 L (18%) and QTc interval was 520 ms. Low doses of salbutamol or salmeterol were used and gradually increased, while monitoring the QT interval. Simultaneously, a low dose of atenolol was maintained. FEV1 was increased to 2.2 L (83%) without further QT prolongation or cardiac events. The case suggests that lower doses of beta 1-antagonists can be tried for cardiac diseases, even in the presence of asthma exacerbations. beta 2-Agonists may be initiated at lower doses and, if tolerated, the dose can be increased in asthmatic patients with a risk for QT prolongation.
Adrenergic beta-Agonists
;
Adrenergic beta-Antagonists
;
Adult
;
Albuterol
;
Asthma
;
Atenolol
;
Bronchial Spasm
;
Emergencies
;
Female
;
Heart Diseases
;
Humans
;
Long QT Syndrome
;
Salmeterol Xinafoate

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