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Pharmaceutical interventions in the management of tuberculosis in a pneumophtisiology department, Ivory Coast

Authors Abrogoua DP, Kamenan BAT, Ahui BJM, Doffou E

Received 29 July 2016

Accepted for publication 9 October 2016

Published 22 November 2016 Volume 2016:12 Pages 1749—1756

DOI https://doi.org/10.2147/TCRM.S118442

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Professor Garry Walsh


Danho Pascal Abrogoua,1 Boua Alexis Thierry Kamenan,1 Brou Jean Marcel Ahui,2 Elisée Doffou3

1Department of Clinical Pharmacy and Therapeutics, Faculty of Pharmaceutical and Biological Sciences, Félix Houphouët-Boigny University, 2Department of Pneumophtisiology, Teaching Hospital of Cocody, 3Department of Pharmacy, Teaching Hospital of Yopougon, Abidjan, Cote d’Ivoire


Objectives: This study aims to analyze the profile and relevance of pharmaceutical interventions (PIs) in the management of tuberculosis (TB) at inpatient settings.
Patients and methods: Cross-sectional descriptive study conducted from March to December 2014 within the inpatient unit of pneumophtisiology department, Ivory Coast. Information collected was based on the classification of drug-related problems (DRPs) and PIs outlined by the French Society of Clinical Pharmacy. A score was assigned to each PI according to the importance of the potential clinical impact. This score was correlated with the severity of clinical consequences avoided by the intervention. The listing of interventions was made by pneumophtisiology specialists. The score assigned to each intervention ranged from 0 (without clinical impact) to 3 (vital clinical impact). The acceptance rate of interventions by physicians was evaluated.
Results: Of 130 patients, 28.5% received PIs. The main reasons for interventions were drug–drug interactions (26.4%), noncompliance with recommendations (24.5%), and adverse effects (24.5%). Antituberculosis drugs were involved in 40.3% of DRPs. Interventions were predominantly proposals for monitoring treatment effectiveness and safety parameters (52.7%) followed by proposals of therapeutic choice (28.1%). All interventions were accepted by the physicians. Most interventions (59.6%) were listed as interventions with significant clinical impact.
Conclusion: The presence of a pharmacist at inpatient setting has contributed to the prevention and resolution of problems related to the pharmacotherapeutic management of TB. Pharmacists can position themselves as major players in the therapeutic management of TB inpatient in resource-limited setting.

Keywords: tuberculosis, drug-related problem, pharmaceutical intervention, relevance, clinical impact, Ivory Coast

Introduction

Tuberculosis (TB) remains a large and growing health problem worldwide. In its 2014 report, the World Health Organization estimated that 9 million people developed TB and 1.5 million died from it, making this disease the second largest cause of death after HIV/AIDS.1 A large majority of these cases were in Asia, but the incidence of TB is highest in Sub-Saharan Africa, in some countries exceeding 300 cases per 100,000 inhabitants.2 Côte d’Ivoire is one of the Sub-Saharan African countries that has been most affected by TB, with an incidence in 2014 of 170 new cases per 100,000 population.1 In addition to drug resistance and HIV,3 poor quality of care for TB is another serious factor that continues to thwart measures taken worldwide against this disease. Assessment of the global situation has shown that clinicians often deviate from internationally recommended standards for the treatment of TB.4 These include insufficient use of microscopic examinations for diagnostic purposes, usually associated with excessive confidence in radiography; use of nonrecommended TB treatments, with incorrect combinations of drugs; dosage and treatment errors; and a lack of supervision and adherence to treatment controls.46 Overall, these findings highlight flaws in care practices, which result in a below standard quality of treatment for TB for those populations most vulnerable to the disease. Improving the quality of care requires not only qualified, available, and motivated personnel but also integration of pharmacists into the health services setting.

With their extensive training and knowledge of drugs in terms of chemical and pharmacological properties, pharmacists are currently interested in the pharmacotherapeutic aspect of care. This pharmaceutical activity has given rise to patient-centered pharmaceutical practices, of which a key element is pharmaceutical interventions (PIs).

Among PIs, pharmaceutical analysis of prescription medications, defined in this study as a drug regimen review (DRR), contributes to improvement of the overall therapeutic response and patient safety. The goal of the DRR is to ensure that optimal patient outcomes are achieved from drug therapy. This includes consideration of the indications, effectiveness, and safety of each medication and the patient’s compliance with drug therapy. The role of the pharmacist includes the identification, resolution, and prevention of drug-related problems (DRPs).

PIs have been demonstrated to have a positive influence on morbidity, the adverse effects of drugs,7,8 and reducing the cost of treatment.9

The purpose of the study was to evaluate the impact of clinical pharmacy activities within the inpatient unit of the pneumophtisiology department of the teaching hospital (CHU) in Cocody-Abidjan, Côte d’Ivoire, through analysis of the profiles of PIs and their relevance (acceptance rate and clinical impact) in the care of patients with TB.

Patients and methods

Study design and setting

We conducted a descriptive cross-sectional study from March to December 2014. This clinical pharmacy pilot study covered all TB inpatients in the pneumophtisiology department of CHU in Cocody-Abidjan during the study period. The study began after obtaining permission from the Cocody Teaching Hospital through its Medical Scientific Department. All patients gave their informed consent. The information collected on patients who were involved in the study remains confidential and anonymous. All persons having access to the data were required to maintain professional confidentiality.

PI collection and classification tool

The information collected was based on the classification of DRPs and PIs outlined by the French Society of Clinical Pharmacy.10 The data included patient characteristics (age, category, sex, diagnosis), identification of DRPs, drugs associated with DRPs, PIs, outcome of PIs, and listing of the clinical impact of PIs and their level of acceptance by physicians.

The main tool supporting data collection that we have called “dashboard” contained key information listed earlier after detecting a DRP.

Study procedure

During the study, the pharmacist integrated the healthcare team in analysis of all medical prescriptions in the context of a DRR.

The pharmacist conducted a prescription review with the possibility of viewing patient medical records together with patients’ biological response and medical history, if these data were available and required analysis. When some information is not included in the medical record, the pharmacist sought such information from the physicians.

If we found that the therapeutic response, safety, efficiency, comfort, or cost of the treatment could be improved, we then developed a pharmaceutical opinion about the detected DRPs. The physician could accept or reject proposals made in the pharmaceutical opinion. If the opinion was accepted, the physician modified the treatment, if possible, and provided a rating of the clinical impact of the PI.

The DRR was done proactively (during medical rounds and staff meetings) or retroactively (by analysis of inpatients’ records). Being limited to a proactive activity would be limited to an active presence of the pharmacist in his/her practice per day. Hence, a retroactive activity with the analysis of inpatients’ medical records fills the rest of the daily time of the pharmacist.

The DRR was undertaken according to the following references: Vidal® Dictionary 2012,11 the Dorosz® guide 2013,12 the 2013 drug interactions thesaurus of the French National Agency of Medicine and Health Products Safety,13 and the 2013 recommendations of the Côte d’Ivoire National Tuberculosis Programme.14

Analysis of PIs and their clinical impact

The potential clinical impact of each PI was interpreted using a score based on a particular listing.15 This listing was derived from those used in the USA by Bayliff and Einarson.16 In practice, a score was assigned to each PI according to the importance of the potential clinical impact of the DRP. This score was correlated with the severity of clinical consequences avoided by the PI. The scale used was the following:

(i)

PI0 (PI without direct clinical impact, for financial or informational purposes only).

(ii)

PI1 (PI with significant clinical impact; increases treatment efficacy and/or patient safety and/or improves patient quality of life).

(iii)

PI2 (PI with very significant clinical impact; prevents organ dysfunction, avoids intensive medical supervision or irreversible sequelae).

(iv)

PI3 (PI with vital clinical impact; avoids a potentially fatal outcome).

The evaluation of the clinical impact of PIs and scoring were performed by physicians specializing in pneumophtisiology.

Evaluation of the relevance of PIs

The relevance of each PI was defined as improving the care of patients. This was evaluated by means of two parameters17: (i) PI acceptance rate, calculated as the ratio of number of PIs accepted by physicians to the total number of PIs and (ii) PI analysis according to clinical impact.

Collaboration between physicians and pharmacists on the healthcare team

Interprofessional relationships are important in obtaining support from physicians to conduct this type of clinical pharmacy research within their practice. In this study, we tested such a partnership between pharmacists and physicians in the management of TB. The pharmacist joined the healthcare team for implementation of this study; there was only one pharmacist on this team. Five physicians (specialists in pneumophtisiology) were also involved, all of whom understood the importance of healthcare professionals working in collaborative practice.

Statistical analysis

Descriptive statistics were used to analyze the data collected. Data were analyzed using IBM SPSS version 20.0 (IBM Corporation, Armonk, NY, USA).

Results

Patient characteristics

Our study included 130 patients, among whom 28.5% received PIs. The population studied were on average aged 38.1±12.9 years, and the sex ratio was 1.3 males per female.

DRPs

The DRPs encountered were dominated by drug–drug interactions (DDIs) (26.4%), noncompliance with the recommendations (24.5%), and adverse effects (24.5%) (Table 1). Two main types of DDIs were detected. The first type of DDI is a common occurrence, especially with rifampicin (an enzyme inducer). This anti-TB drug is associated with a potential decrease in the plasma concentrations of several drugs. The risks include decreasing drug effectiveness (with metronidazole, albendazole, fluconazole, prednisone, tetracosactide) or the occurrence of convulsion (with valproic acid). The second type of DDI was at the level of absorption of various drugs (fluconazole + rifampicin, esomeprazole + fluconazole, aluminium phosphate + prednisolone + omeprazole, omeprazole + aluminum phosphate). The most frequent DDIs involved PIs for the clinical monitoring of therapeutic response and eventual dose adjustment of drugs associated with rifampicin. Other DDIs required spacing between administration of associated drugs.

Table 1 Detected drug-related problems

A total of 56.1% of DRPs were identified during medical visits and 43.9% after the analysis of patient records.

Proportion of anti-TB drugs involved in DRPs

Anti-TB drugs were involved in 40.3% of DRPs (Table 2). Other drugs associated with anti-TBs, involved with 59.7% of DRPs, were classified as level 1 (main group) of the anatomical therapeutic chemical classification system.

Table 2 Proportion of antituberculosis drugs associated with drug-related problems

Types of PI

PIs were mainly constituted of proposals regarding parameters for monitoring the effectiveness and safety of treatments (52.7%) and were of the clinical monitoring (36.9%) and biological monitoring (15.8%) types. Proposals for therapeutic choice (28.1%) were added therapy (8.7%) and treatment discontinuation (19.4%) (Table 3).

Table 3 Types of pharmaceutical intervention

Clinical impact of PIs and acceptance rate by physicians

All interventions made were accepted by physicians. Most of these interventions were listed as PI1 (59.6%), that is, with significant clinical impact or PI0 (26.3%), without direct clinical impact. Interventions with very significant clinical impact (PI2) accounted for 14.1% of PIs (Table 4).

Table 4 Clinical impact and acceptance rate of pharmaceutical interventions
Abbreviation: PI, pharmaceutical intervention.

Practical examples of DRPs and PIs carried out in our study are presented in Table 5.

Table 5 Examples of detected DRPs and PIs during our study
Abbreviations: DRPs, drug-related problems; PIs, pharmaceutical interventions.

Discussion

Principal DRPs

Pharmacists are responsible for ensuring the proper use of medication through the detection of DRPs. In our study, 57 DRPs were detected, of which the main one was DDIs (26.4%). Hospitalized patients typically experience polypharmacy and in our study, most patients were hospitalized for complications of TB, which require the use of several drugs, thereby causing these DDIs. The effect of rifampicin, a strong cytochrome P450 inducer, contributes to this high rate of DDIs. In a study conducted in South Africa, the authors showed that there were significant potential interactions between anti-TB drugs and other medications that shared various toxicities.18 According to Becker et al, DDIs increase morbidity and mortality and are responsible for hospitalization or prolongation of hospitalization.19

The DRPs found in our study also involved noncompliance with recommendations (24.5%). In Côte d’Ivoire, the care of TB patients is dictated by recommendations made by the NTP, which have been widely disseminated to physicians. Our result is comparable to that of Démange, whose care unit found that noncompliance with recommendations was the most common DRP in 28.6% of interventions.20 The rate of 24.5% found in our study involved both anti-TB drugs as well as other drugs associated with TB treatment.

Adverse effects constituted 24.5% of DRPs in this study. TB quadritherapy is frequently the cause of adverse effects. Indeed, Vieira and Gomes found that 12.8% of adverse effects were related to intake of anti-TB drugs.21 A study in a pulmonology department of Algeria reported that 20.8% of patients undergoing TB treatment experienced adverse effects.22 The presence of comorbidities and/or TB complications requires support in the form of prescriptions of other pharmaceutical agents that do not cause or exacerbate adverse effects in association with anti-TB drugs.

During our study, nearly 56% of problems with prescriptions were detected during medical rounds. The study of Kucukarslan et al in a medical unit showed that a pharmacist’s participation in medical visits resulted in a reduction of medication errors by 78%.23

Profiles of drugs

The drugs used for interventions throughout the course of our study belonged to several pharmacotherapeutic groups. Those most frequently cited in the literature were also present in our study. Medication classes of the nervous and cardiovascular systems, alimentary tract and metabolism, anti-infectives, and drugs of the blood and blood-forming organs are the most cited in studies on PIs.9 Anti-infectives, with 59.4%, were the most frequently associated with DRPs, with a predominance of anti-TB drugs found in 40.3% of DRPs. This result concurs with those of Chabia et al24 who showed that anti-infectives constituted 31% of the reasons for interventions. The most encountered drugs among detected DRPs were rifampicin (28%), omeprazole (12%), isoniazid (7%), cotrimoxazole (7%), and ceftriaxone (5%). In the patient care unit, the profile of medicines used depends on the specific pathologies. Rifampicin is one of the basic molecules used in the treatment of drug-susceptible TB. Its role in DDIs, owing to its inductive effect on cytochrome P450, likely explains its involvement in DRPs.

PIs carried out

In our study, PIs were mainly concerned with proposals for monitoring treatment effectiveness and safety in 52.7% of cases. Proposals for therapeutic choice in terms of stopping or adding treatment were made in 28.1%. Approximately 8.7% of PIs were for dose adjustments. Démange found that PIs were dominated by discontinuing treatment (39.3%) and dose adjustments (28.6%), and PIs related to therapeutic monitoring represented 1.4%.20 Gaillard et al reported that PIs were related to treatment substitutions (50%), optimization of administration methods (24%), dose adjustment (11%), and therapeutic monitoring (4%).25 These differences can be explained by the differing medical contexts of these studies. Indeed, Démange conducted his study in several medical and surgical services,20 whereas ours was carried out in a single service. The PIs performed by Gaillard et al focused on the treatment of patients upon admission,25 while ours involved all prescriptions after hospital admission of the patient until their release from the hospital.

Relevance of PIs

The acceptance rate of PIs in this study was 100%. This very high rate was comparable to those found in the literature, especially in the studies of Tanguy-Goarin and Mugnier (93.6%)17 and Démange (89.3%).20 This can be interpreted as a sign of the relevance of PIs and the proper use of pharmacists’ knowledge to improve patient health care. All these studies have confirmed not only interest in using the expertise of pharmacists within the medication system but also the fact that the presence of a pharmacist in the healthcare unit increases the number of PIs and their rates of acceptance.26

Interventions were rated PI1 in 59.6% of cases, that is, with significant clinical impact. Listed PI2 interventions with a very significant clinical impact accounted for 14.1%. This further demonstrates the relevance of PIs. A study by Jenn et al found that 63.3% of interventions had a significant impact and 22.8% a very significant impact.27

Role of the pharmacist

Multidrug-resistant TB and extensively drug-resistant TB have been identified as serious public health threats that call for increased efforts in managing TB.28 It has been suggested that pharmacists should play a greater role in TB treatment by promoting treatment adherence; assessing patients for risk factors for resistant disease; providing information about disease control and prevention; and monitoring for effectiveness, adverse effects, and DDIs.29 Therefore, pharmaceutical care in TB management is a complex intervention as there are various PIs contributing to the control of this disease. Our study revealed this complexity in the multifaceted nature of the PIs carried out. We considered PIs in an inpatient setting with a need to improve therapeutic outcomes and to prevent iatrogenic events. In the work of Venkatapraveen et al, PIs were found to have a significant influence on the healthcare outcomes of TB patients; the sputum conversion rate in their intervention group was 80.71% versus 43.86% in the control group.30 In our study, participation by the pharmacist in the management of TB allowed for detection of the DRPs faced by physicians with respect to their current practice, the main one being DDIs. The pharmacist’s role is therefore to provide physicians with expertise in the management of DDIs and other DRPs. Medication history during patient admission and counseling sessions at the end of hospitalization can be integrated into PIs in future studies.

The management of patients with TB requires a multidisciplinary team of healthcare professionals. Pharmacists form a crucial part of such teams and can be involved with different stages in the value chain for TB control using effective PIs. Therefore, pharmacists should be urged to participate in the management of TB at hospital healthcare units in Côte d’Ivoire, where they currently do not provide pharmaceutical care at TB inpatient settings.

Study limitations

The first limitation of this pilot study is the participation of a small number of healthcare professionals. Only physicians in this pneumophtisiology department who were already in agreement with the importance of pharmacists working in collaborative practice on a healthcare team participated in the study. Only one pharmacist was available for prescription reviews; therefore, because of time scarcity, many drug prescriptions were not reviewed. To provide more time per patient and per prescription, more pharmacists would be needed. In addition, enhanced pharmacist–patient communication was not sufficiently implemented. This type of communication is important for drug reconciliation and therapeutic patient education.

The study was conducted in one pneumophtisiology department of Côte d’Ivoire, which may restrict generalization of the profile of DRPs and PIs related to TB inpatient treatment. This pilot study was carried out within a relatively short period of time (10 months with a break owing to temporary closure of the department for sterilization after two cases of resistant strain Pseudomonas aeruginosa infection). DRPs were identified by assessing problems related to prescriptions. Problems related to patient factors (patients’ behavior and attitude toward medications, and beliefs and concerns about medications) and problems related to organizational factors were not investigated. The clinical impact of accepted PIs was not correlated to patient healthcare outcomes but was based only on physicians’ points of view and on the type of rating.

Conclusion

The presence of a pharmacist at inpatient setting has contributed to the prevention and resolution of problems related to the pharmacotherapeutic management of TB. The PIs in this study were proved relevant by their high acceptance rate and significant clinical impact. Pharmacists can position themselves as major players in the therapeutic management of TB inpatient. The management of TB is multidisciplinary; it is therefore necessary that each healthcare professional can act effectively at their own level to fight against the disease. Pharmacists must invest in increasing their role and positioning themselves fully as key players in the management of TB at inpatient settings in Côte d’Ivoire.

Acknowledgments

The authors would like to thank the management at the Abidjan Cocody Teaching Hospital and the Medical Scientific Department, which allowed them to conduct this study. Also, they would like to extend their thanks to the head of the pneumophtisiology department.

Disclosure

The authors report no conflicts of interest in this work.


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