2Centre for Research in Health Technologies and Information Systems (CINTESIS) University of Porto, Portugal
3Health Information and Decision Sciences Department (CIDES), Faculty of Medicine, University of Porto, Portugal
Methods: A study was performed between 2013 and 2015. A web service was created and implemented in an EHR in use. We analysed the trends and type of ADR reported through this service.
Results: From April 2013 to February 2015, 167 ADR reports were sent to the Northern Pharmacovigilance Centre through the web service, comprising 10% of the total ADR reports received in the same period. Of these, 118 cases were serious (one was life-threatening). In the northern region of Portugal, GEDII physicians reported 9 ADR during the 23 months previous to web service implementation and 121 ADR during the 23 months after web service implementation, i.e. an increase of 1244%.
Conclusions: This solution allowed for reporting 167 ADR during the first 23 months of implementation, simply by clicking a button included in the usual EHR used by gastroenterologists. These results suggest that information systems (IS) should facilitate the reporting of ADR.
Keywords: Adverse Drug Reactions; Inflammatory Bowel Disease; Pharmacovigilance; Electronic Health Records
It is known that, one of the main reasons why healthcare professionals do not report ADR is due to an increase in their workload [3,4]. So, in order to reduce ADR reporting efforts, Information Systems (IS) to promote ADR reporting or to detect ADR in healthcare institutions have been tested and used, such as software for voluntary and automated detection of ADR, tools that analyse clinical databases or web-sites that actively inform healthcare professionals . Information and communication technologies can also be used to facilitate and promote ADR reporting, such as the creation of on-line reporting forms and the development of tools to collect safety data from Electronic Health Records (EHR), among others [6,7].
In Portugal, there is a multi centre research project, in the field of gastric diseases (Study Group of Inflammatory Bowel Disease – GEDII)  whose members use the same electronic health record to collect patient information. As these patients are often treated with new and potent drugs (e.g. immunomodulating agents), the EHR has a field related to medication and ADR. Since the group members already fill in this field, it was considered an advantage to create a tool to send the data to the pharmacovigilance system.
The GEDII members asked for collaboration with the Northern Pharmacovigilance Centre (UFN in Portuguese) and the Health Information and Decision Sciences Department (CIDES) of the Faculty of Medicine to develop a tool to allow for easy reporting of ADR included in the EHR to the pharmacovigilance system. The two entities had, at the time, released a new information service (a web service) to collect suspected adverse reactions directly from prescription and medical records. This system was easily adapted to the EHR used by the GEDII group.
The Northern Pharmacovigilance Centre, as part of the Portuguese Pharmacovigilance System, receives ADR reports from healthcare professionals (and, since 2012, from consumers as well) through an on-line form, a paper form, e-mail and by telephone. Since 2013, UFN has also received ADR reports through the web service.
The web service anonymises patient data (converting the full name of the patient into initials), according to the data protection standards of the Portuguese Pharmacovigilance System. Figure 1 shows the information flow from the electronic health record to the pharmacovigilance system.
To use this service, there is a button asking the doctor if he/ she will allow the information to be sent to the pharmacovigilance database (see Figure 2). If the physician does not allow for this information to be sent to the system, it will only be stored in the health record.
In order to use this web service, it is necessary to access a specific URL, provided by the Northern Pharmacovigilance Centre and CIDES. The service was incorporated in the GEDII software to collect the ADR already stored by the physicians in the system. Each physician, in the context of the patient, sends the ADR to the Regional Pharmacovigilance Centre.
After the ADR report is received by the Regional Pharmacovigilance Centre, their technical staff process the report according to the pharmacovigilance guidelines , sending it to the Portuguese Regulatory Authority (INFARMED).
If the doctor does not want to send the information to the pharmacovigilance system, it will only be stored in the medical history.
To analyse the trends and type of ADR reported through this service, we performed a descriptive analysis on the number and seriousness of ADR reported. The seriousness was assessed using the World Health Organisation  seriousness criterion . According to this criterion, a serious ADR is any untoward medical occurrence that at any dose: results in death, requires inpatient hospitalisation or prolongation of existing hospitalisation, results in persistent or significant disability/ incapacity or is life-threatening.
Of the 167 reported ADR, 118 (71%) were serious ADR, considering the World Health Organisation seriousness criterion . One of the cases was life-threatening and none were fatal.
To calculate the increase in ADR reporting in this period, we used data from the northern region, which is the delimited area of the Northern Pharmacovigilance Centre, as we did not have access to national ADR reporting data. Thus, considering the physicians from the GEDII group that work in at the northern region of Portugal, 9 ADR were reported during the 23 months prior to web service implementation and 121 ADR were reported during the 23 months after web service implementation, i.e. an increase of 1244%.
Of the reported ADR, 106 cases (63%) were presumably due to azathioprine, 23 cases (14%) to infliximab, 14 cases (8%) to adalimumab and 9 (5%) cases to methotrexate (Figure 3).
All of these drugs are classified as antineoplastic and immunomodulating agents, according to the WHO Anatomical Therapeutic Chemical (ATC) classification system . Azathioprine, infliximab and adalimumab are immunosuppressants and methotrexate is an antimetabolite.
It is also important to note that most of the reported ADR were serious. In fact, the studied group deals with innovative and powerful drugs those often cause serious adverse events. This finding reinforces the importance of our work, as Pharmacovigilance Systems seek mainly information about serious (and unexpected) ADR .
Our study has some limitations, such that it only included gastroenterologists. However, this web service is available to be used in several software. Even so, it is currently in use only in two software systems: the one described in this study and an electronic prescription software system. Another issue is that our study does not have a control group, which limits the conclusions drawn. For this reason, the only comparison that the authors were able to perform was for the number of ADR reports made by the same group of gastroenterologists before the web service implementation.
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