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Optimization of clinical and pharmacological approaches to the treatment of patients with Bronchial Asthma

Kubaeva M.B.*, Ivanov D.A., Zyryanov S.K.

Department of General and Clinical Pharmacology, Institute of Medicine,  Peoples' Friendship University of Russia, Moscow, Russia.


ABSTRACT

An evaluation of pharmacotherapy of bronchial asthma in the allergological department of the multidisciplinary hospital is presented. A retrospective pharmaco-epidemiological analysis of 331 medical histories revealed the risks of potentially dangerous drug interactions and adverse drug reactions. The analysis showed potential risks in 79 clinical records, with 15 records showing two or more risks.

Keywords: bronchial asthma, undesirable drug reactions, personalized therapy, optimization of approaches to the treatment.


Introduction 

Allergy is an inflammatory reaction [1-3], which occurs when the immune system overreacts to some allergens [4]. Bronchial asthma (BA) is a chronic disease. Its course and severity depend on many factors, including the timeliness of administration, rationality, and personalization of pharmacotherapy. The rational approach combines current guidelines based on clinical trials with an assessment of individual risks, such as undesirable drug reactions and potential drug interactions.

Although potentially dangerous drug interactions do not always manifest as clinical consequences in the form of undesirable drug reactions or mitigation of therapeutic efficacy, timely detection of potentially undesirable drug combinations should increase the effectiveness and safety of the pharmacological intervention.[5]

Undesirable drug reactions are the main risks of drug administration. The effects of undesirable drug reactions can have significant medical, economic, and social consequences. Undesirable drug reactions can necessitate hospitalization including prolonged and repeated hospitalizations, the development of concomitant diseases, and an increase in symptom severity; unintended drug reactions may even cause the patient’s death. At best, undesirable drug interactions reduce the patients’ quality of life, their trust in doctors, and their adherence to treatment regimens.

Treatment costs and the economic burdens of the disease increase with undesirable drug reactions.[6, 7] While the public health system has been working to improve drug safety and decrease incidents of undesirable drug reactions, the problem continues to be relevant; during hospitalizations at the instant hospital, undesirable drug reactions still occur in 14–30% of patients, and 3-14% of patients are required to prolong their hospitalization as a result of these complications.[8]

Because doctors see patients in independent clinical conditions, diagnosis of delayed drug reactions and reactions associated with long-term use is difficult. Predisposing risk factors of undesirable drug reactions and drug interactions include the duration of treatments and the degree of pharmacologically-induce stressors. The risk of undesirable drug reactions and drug interactions are also heavily dependent on the characteristics of the drugs used.

Asthma pharmacotherapy drug groups attracting attention are systemic glucocorticosteroids and methylxanthines. As set forth in the Global Initiative for Asthma (GINA 2018), systemic risk factors associated with the development of undesirable drug reactions in BA patients are frequent use of systemic glucocorticosteroids, prolonged use of high doses or the use of potent inhaled glucocorticosteroids (IGCs), as well as the use of inhibitors of the cytochrome P450 family of enzymes, e.g. itraconazole, ketoconazole, and ritonavir.[9]

The risk of developing undesirable drug reactions increases with patient comorbidity [10], and with the administration of drugs by narrow specialists working independently of each other. Other risk factors include doctor-underestimations of the patient’s condition, low patient adherence to treatment protocols, improper use of inhalers, the patient’s tendency to take additional drugs to relieve an attack and to refuse basic therapy; all of these can lead to an increase in the severity or prognosis of the disease.[11] Using information services such as decision support systems, in conjunction with medical information systems, databases, and other tools [12] helps reduce the number of medical errors and the risk of undesirable drug reactions.

Objective: Optimization of clinical and pharmacological approaches to the treatment of patients with BA.

Materials and Methods

This study involved a review of the case histories of 331 patients hospitalized in the allergology department of a multidisciplinary hospital for exacerbation of their preexisting conditions. The risk of drug interactions was determined by reference to the Medscape and Drugs.com databases. Potentially major and moderate levels of negative drug interactions were analyzed by system gradation. Statistical analysis was performed using the SPSS licensed package. Primary sources of information on interactions, undesirable drug reactions, and the pharmacokinetic features of anti-asthma drugs were gleaned from scientific literature and instructions for use obtained from the State Register of Medicines of the Ministry of Health of the Russian Federation (Drug Interactions Checker - Medscape Drug Reference Database).[13]

Results and Discussion

331 case histories were analyzed. 55.6% of cases were men and 44.4% were women. The average age of patients was 34.6 years. Elderly patients (60 years or more) were 7.6%. The BA pharmacotherapy in all cases complied with the Federal recommendations, and the relevant recommendations of the international agreement GINA were taken into account. Concomitant diseases of hospitalized patients are shown in table 1.

 

 

Table 1. Structure of comorbid conditions of the studied patients.

Comorbid conditions

The number of cases, the proportion of the total number of cases

Cardiovascular diseases

121 (36,6%)

Kidney disease

41 (12,4%)

Diseases of the gastrointestinal tract

69 (20,8%)

Pathology of the endocrine system

27 (8,2%)

Chronic Obstructive Pulmonary Disease

16 (4,8%)

 

 

The average number of drugs assigned to one person was 5.7. The obtained data on the identified risks of potentially dangerous drug interactions are presented in figure 1.

Figure 1. Structure of the identified risks of potentially dangerous drug interactions

The simultaneous administration of antimycotics from the group of azoles (fluconazole) with systemic glucocorticosteroids was registered in 7.6% (25 cases). Simultaneous administration of systemic glucocorticosteroids and fluoroquinolones was noted in 13.3% (44 cases). Non-steroidal anti-inflammatory drugs (NSAIDs) and systemic glucocorticosteroids were simultaneously administered in 5.1% (17 cases). Cases of simultaneous use of loop diuretics and systemic glucocorticosteroids were 2.7% (9 cases). Thus, potentially possible negative drug interactions were revealed in 79 stories, including 2 and more in 15 stories.

Anti-inflammatory therapy to prevent or reduce the exacerbation of BA includes the systemic administration of glucocorticosteroids; this is strongly associated with an increased risk of undesirable drug reactions and drug interactions. The level of systemic glucocorticosteroids in blood plasma and the severity of their pharmacological effects increases with co-administration of cytochrome P450 3A4 inhibitors. Cytochrome P450 3A4 inhibitors include some antibiotics (clarithromycin, ciprofloxacin, chloramphenicol), antiarrhythmic drugs (verapamil, diltiazem, amiodarone), antiviral drugs, antifungal agents, and food products like grapefruit juice.[14] Of the antifungal drugs prescribed in all cases studied was fluconazole. Fluconazole is a moderate inhibitor of microsomal oxidation. The risk of the interaction of prednisolone and fluconazole is rated as moderate, but it can be increased with the inclusion of high doses of systemic glucocorticosteroids, high-activity drugs, and in cases of long-term sharing.[15]

Where it is impossible to avoid simultaneous use of systemic glucocorticosteroids with CYP450 3A4 inhibitors, especially where there is prolonged use, it may be advisable to prescribe a less lipophilic drug with a shorter half-life and to divide the appointment of systemic glucocorticosteroids and the CYP450 3A4 inhibitor as much as possible within a 24-hour span.

There are known risks of tendinitis and tendon rupture associated with fluoroquinolone treatment; tendonitis and tendon rupture more often affect the Achilles tendon, the shoulder rotational cuff, bicep tendons, and the tendons of the thumb. Tendon rupture can occur during or up to several months after completion of therapy with fluoroquinolones. In some cases, it requires surgical treatment. Risk factors for tendonitis or rupture are over 60 years of age and kidney, heart, and lung transplant recipients. Patients should be advised to stop taking fluoroquinolones, avoid exercise, and active work if symptoms of inflammation (pain and swelling) develop in a tendon area.[16, 17] Co-administration of systemic glucocorticosteroids and fluoroquinolones may increase these risks.

The combined use of systemic glucocorticosteroids and nonsteroidal anti-inflammatory drugs (NSAIDs) increases the risk of damage to the gastrointestinal tract due to reduced production of prostaglandins. There is a three-fold increase in the risk of developing peptic ulcers when no use is compared with the use of NSAIDs or systemic glucocorticosteroids as monotherapy and there is a ten-fold risk when they are combined.[18]

Systemic glucocorticosteroids can reduce the effectiveness of antihypertensive drugs by inducing sodium retention and body fluids. These effects are more likely when using natural corticosteroids like cortisone and hydrocortisone, since they have a greater mineralocorticoid activity, but it is not eliminated with the administration of synthetic systemic glucocorticosteroids. [19]

The administration of both loop diuretics and systemic glucocorticosteroids may lead to the development of hypokalemia or hypocalcemia. Symptoms of hypokalemia are weakness, cramps, muscle pain, and heart rhythm disturbances. Some patients may require additional administration of potassium supplements. The loss of calcium that develops when prescribing drugs of these groups can result in drug-induced osteoporosis.[20]

Conclusion

Drug reactions and interactions are a constantly evolving field. Eliminating the risks of drug interaction and the development of undesirable drug reactions is an important element in the development and application of rational, personalized therapies. Best practices incorporating the regular use of information services to assess potential drug interactions and reduce the risk of undesirable drug reactions can reduce medical, economic, and social consequences of poor prescriptive choices leading to fewer and shorter hospitalizations, prevent the development of concomitant diseases, decrease BA symptom severity, and increase patients’ quality of life, their trust in doctors, and their adherence to treatment regimens. Most importantly, it can reduce unnecessary loss of life.

The results of this analytical work were presented to the head of the department and reported at the medical conference in the form of educational materials based on the department’s data. Based on the data obtained, changes to the separation form have been proposed.

Conflict of interests

There are no conflicts of interest.

Financial Support and Sponsorship

Nil.

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