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. 2021 Mar 24;9(2):69. doi: 10.3390/pharmacy9020069

Table 2.

Overview of papers included in review in alphabetical order.

Author (Year)
RQ
Focus (What) Study Characteristics (How, Where)
Adam and Vang (2015) [34]
RQ2
Quantitative evaluation of DDI websites intended for patient use - Evaluation of 44 DDI websites
- Quantitative evaluation
- United States
Bailey et al. (2014) [35]
RQ2
Assessment of apps intended for patient self-management - Quantitative assessment of 424 apps in total, of which 12 included the DDI feature
- United States
Dohle et al. (2017) [43]
RQ1
Testing if providing
individuals with information about a drug combination that presents a synergistic risk increase perception and influence dosing decisions
- Two experiments where patients were presented with scenarios providing different information about DDI
- Adult participants (n = 565)
- United States
Gustafsson et al. (2017) [44]
RQ1
Evaluation of how well patients recognize and comprehend PIL, including information about DDIs, as well as reasons for poor comprehensibility - PILs for 30 commonly prescribed medicines
- PILs evaluated by experts using a protocol and patients using a questionnaire
- Sweden
Haverhals et al. (2011) [45]
RQ1
Elucidation of the medication self-management needs and strategies of older adults with multi-morbidity and their adult caregivers that can be addressed by an electronic personal health application - Semi-structured interviews, individually and in exploratory/confirmatory focus groups
- Purposive sample of 32 adult patients and 2 adult family caregivers
- United States
Herber et al. (2014) [46]
RQ1
Exploration of patients’ reactions and behavior towards risk information in PILs of commonly prescribed drugs by general practitioners - Focus groups
- Patients in general practitioners’ practices
- Six focus groups with 35 patients
- Germany
Heringa et al. (2018a) [47]
RQ1
Exploration of aspects influencing patients’ preferences regarding DDI management - Focus groups: patients in 5 different community pharmacies
- Total of 38 participants, who have used cardiovascular drugs for over 1 year, distributed in five focus groups
- Netherlands
Heringa et al. (2018b) [48]
RQ1
Exploration of patients’ and pharmacists’ preferences regarding DDI management - On-line questionnaires: choice-based conjoint task on a fictitious DDI
- 178 pharmacists and 298 patients
- Patients were older than 40 years, and all used cardiovascular drugs
- Netherlands
Indermitte et al. (2007) [49]
RQ1
Assessing prevalence and patient awareness of selected potential DDIs with self-medication - Observation of 1183 pharmacy customers
- Interview with 536 pharmacy customers
- 14 community pharmacies
- Switzerland
Justad et al.
(2021) [50]
RQ1 and RQ2
Evaluation of why and how patients use an online DDI service, how they perceive content and usability, and how they declare they would react if they found an interaction - A web-based questionnaire among users who had registered as a “patient” (n = 406, response rate 12.6%) for a DDI service aimed at professionals
- Sweden
Khodambashi et al. (2017) [51]
RQ1 and RQ2
A comparative assessment of a prototype tool developed and evaluated for DDI - A comparative mixed-methods evaluation between a developed prototype and PILs
- Evaluation with 13 participants
- Prototype co-designed with patients and pharmacists
- Norway
Kim et al. (2018) [36]
RQ2
Assessment of mHealth apps for DDIs found on App Store and Google Play aimed at Canadian citizens - Quantitative assessment of 23 mHealth apps for information comprehensiveness and accuracy of DDI
- Canada
Kusch et al. *
(2018) [22]
RQ1
Scoping review study that:
- Describes drug information desired by patients
- Analyzes how drug information can be customized to meet the patient’s individual needs
- 12 studies of patient enquiries to drug information hotlines and services
- 15 qualitative studies evaluating drug information needs
- Several countries
Martin-Hammond et al. (2015) [52]
RQ2
Iterative design and evaluation of a prototype for OTC medication for patients, which among many features, includes a DDI service - Design and evaluation of a prototype using two experts and seven elderly users
- Qualitative study
- United States
Mutebi et al.
(2013) [53]
RQ1
Assessment of patients’ information needs and preferences about potential DDIs, in order to inform patient DDI education resources - On-line questionnaire
- Sample of 100 registered users of an online medication monitoring service
- United States
Shiguang Loy et al. (2016) [37]
RQ2
Assessment of apps for DDI feature - Quantitative assessment of 59 apps for DDI using a tool developed by authors
- English apps without a geographically limited scope
Spanakis et al. (2016) [54]
RQ2
Evaluation of a DDI tool developed for patient empowerment - Quantitative evaluation of a DDI tool with 35 patients
- Unspecified geographical scope
Spanakis et al.
(2019) [55]
RQ2
Evaluation and presentation of an eHealth platform including DDI checkers developed for patient empowerment - Describing content of a platform and knowledge database
- Pilot evaluation with 33 health professionals
- Quantitative and qualitative evaluation
- Greece
Vingen et al. (2020) [38]
RQ2
Evaluation of usability issues that patients might face when using publicly available DDI checkers - Mixed methods, heuristic expert evaluation
- 6 websites evaluated on a mobile browser
- Scandinavia

* The individual papers included in the review by Kusch et al. was not included in the present scoping review. RQ = research question; RQ1 = papers relevant for research question 1; RQ2 = findings relevant for research question 2; DDI = drug–drug interaction; PIL = patient information leaflet.