Clinical trial NCT03879590: Efficacy Of Doxophylline As A Sparing Treatment For Inhaled Corticosteroids In Mexican Children With Asthma
Official title: Efficacy Of Doxophylline As A Sparing Treatment For Inhaled Corticosteroids In Mexican Children With Asthma
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: PHASE3
Conditions: Asthma Chronic
Asthma in Children
Keywords: doxophylline
asthma
steroid sparing
Lead sponsor: Universidad Autonoma de Nuevo Leon
Sponsor class: OTHER
First posted: 2019-03-19
Enrollment: 60
Sex: ALL
Minimum age (years): 6
Maximum age (years): 16
Standard ages: CHILD
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: This study evaluated the efficacy of doxophylline as a steroid sparing treatment in Mexican children with asthma treated with medium ir high doses of inhaled corticosteroids (ICS). It is a cross over study in which both groups of patients will receive doxophylline plus a lower steroid dose maintaining the same treatment step according to GINA guidelines, one group will maintain the same treatment dose while the other will start with doxophylline with the lower ICS dose, and by the middle of the study both groups will interchange treatment schemes.

Detailed description: Inhaled corticosteroids (ICS) are first-line drugs for the treatment of persistent asthma. The effectiveness of existing ICS is excellent; however, a number of questions remain regarding its possible adverse effects, despite the fact that the use of the inhalation route has allowed the minimization of the systemic exposure to these drugs. Methylxanthines are widely used in the treatment of asthma. It is one of the few medications for asthma that can be administered orally. They are useful especially in patients who cannot adapt to inhaled medications. Methylxanthines are unique in exhibiting dual-function properties by inducing bronchodilation and having anti-inflammatory and immunomodulatory effects. Theophylline is the oldest methylxanthine and non-specifically inhibits phosphodiesterase, it is a little used drug because it has many adverse effects with lower therapeutic index. Doxophylline is a drug of the family of methylxanthines, with a similar efficacy compared to theophylline when applied in the treatment of various respiratory diseases, but with better tolerability profile. Doxophylline has been shown to be a bronchodilator and anti-inflammatory drug with a wider therapeutic window than other methylxanthines. Clinical studies have reported that doxophylline is more effective in improving lung function tests in adults and children, as well as in decreasing clinical symptoms, reducing the incidence of adverse effects and the need of emergency bronchodilators, with a better profile in terms of safety and it has been demonstrated that doxophylline potentially reduces the need for corticosteroids.

Eligibility criteria: Inclusion Criteria:

1. Mexican patients between 6 and 16 years old.
2. Clinical diagnosis of asthma according to the current guidelines of the Global Asthma Initiative (GINA) 2018.
3. Patients with asthma treated with budesonide at medium or high doses during (GINA guidelines´ steps 3 or 4) at least two months before the first study visit. Budesonide medium dose: 200-400 mcg / day (6-11 years) and 400-800 mcg / day (\> 12 years). Budesonide high dose: \> 400 mcg / day (6-11 years) and \> 800 mcg / day (\> 12 years).

Exclusion Criteria:

1. Patients \<6 or ≥16 years of age.
2. Patients with \<16 kg of body weight.
3. Patients who have had an asthma exacerbation that required treatment with systemic corticosteroids (oral, intramuscular or intravenous) during the 2 months prior to the first study visit.
4. Patients who have presented an asthma exacerbation that required hospitalization during the 2 months prior to the first study visit.
5. Any other chronic lung disease that could impair lung function evaluation.
6. Cardiovascular, infectious, metabolic or neoplastic disease that could interfere with the evaluation of the patient.
7. Current use of drugs that interact with doxophylline: other xanthines, ephedrine or other sympathomimetics, erythromycin, troleandomycin, lincomycin, clindamycin, allopurinol, cimetidine, two months prior vaccination, propranolol, phenytoin or other anticonvulsants.

Primary outcomes:
measure: Changes in the values of the forced expiratory volume on the first second
timeFrame: 4 weeks
Secondary outcomes:
measure: Use of rescue therapy
timeFrame: 4 weeks
measure: Clinical asthma control assessment
timeFrame: 4 weeks
measure: Asthma exacerbations
timeFrame: 4 weeks
measure: Use of systemic corticosteroids
timeFrame: 4 weeks
measure: Changes on the exhaled breath temperature
timeFrame: 4 weeks
Other outcomes:
Locations:
Study officials:
affiliation: Universidad Autónoma de Nuevo León
name: Sandra Nora González-Díaz, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Lal D, Manocha S, Ray A, Vijayan VK, Kumar R. Comparative study of the efficacy and safety of theophylline and doxofylline in patients with bronchial asthma and chronic obstructive pulmonary disease. J Basic Clin Physiol Pharmacol. 2015 Sep;26(5):443-51. doi: 10.1515/jbcpp-2015-0006.
citation: Margay SM, Farhat S, Kaur S, Teli HA. To study the efficacy and safety of doxophylline and theophylline in bronchial asthma. J Clin Diagn Res. 2015 Apr;9(4):FC05-8. doi: 10.7860/JCDR/2015/12438.5743. Epub 2015 Apr 1.
citation: Rajanandh MG, Nageswari AD, Ilango K. Assessment of various second-line medications in addition to inhaled corticosteroid in asthma patients: a randomized controlled trial. Clin Exp Pharmacol Physiol. 2014 Jul;41(7):509-13. doi: 10.1111/1440-1681.12239.
citation: Riffo-Vasquez Y, Venkatasamy R, Page CP. Steroid sparing effects of doxofylline. Pulm Pharmacol Ther. 2018 Feb;48:1-4. doi: 10.1016/j.pupt.2017.10.008. Epub 2017 Oct 16.
citation: Rajanandh MG, Nageswari AD, Ilango K. Pulmonary function assessment in mild to moderate persistent asthma patients receiving montelukast, doxofylline, and tiotropium with budesonide: a randomized controlled study. Clin Ther. 2014 Apr 1;36(4):526-33. doi: 10.1016/j.clinthera.2014.02.006. Epub 2014 Mar 17.