Background Aging populations are often accompanied by comorbidity and polypharmacy, leading to increases in adverse drug reactions (ADRs). We sought to evaluate the causes and characteristics of ADRs in older Korean adults (≥ 65 years) in comparison to younger individuals (< 65 years).
Methods Of 37,523 cases reported at a Korean pharmacovigilance center from 2011 to 2018, we reviewed 18,842 ADRs of certain or probable causality on the basis of WHO-UMC criteria. Subjects exposed to major culprits were extracted from cohorts transformed to the Observational Medical Outcomes Partnership Common Data Model during the study period.
Results In total, 4,152 (22.0%) ADRs were reported for 3,437 older adults (mean age, 74.6 years and 57.3% female). Tramadol (rate ratio, 1.32; 95% confidence interval [CI], 1.21–1.44; P < 0.001) and fentanyl (1.49, 1.16–1.92, P = 0.002) posed higher risks of ADRs in the older adults, whereas nonsteroidal anti-inflammatory drugs (NSAIDs) (0.35, 0.30–0.40, P < 0.001) and iodinated contrast media (ICM) (0.82, 0.76–0.89, P < 0.001) posed lower risks. Ratios of serious ADRs to NSAIDs (odds ratio, 2.16; 95% CI, 1.48–3.15; P < 0.001) and ICM (2.09, 1.36–3.21, P = 0.001) were higher in the older adults than in the younger patients. Analgesics primarily elicited cutaneous ADRs in the younger patients and gastrointestinal reactions in the older adults. ICM more commonly led to anaphylaxis in the older adults than the younger patients (3.0% vs. 1.6%, P = 0.019).
Conclusion For early detection of ADRs in older adults, better understanding of differences in the causes and characteristics thereof in comparison to the general population is needed.

Figure 1

Figure 2
This is a list of supplementary files associated with this preprint. Click to download.
Loading...
On 21 Nov, 2020
On 18 Nov, 2020
Received 11 Nov, 2020
On 01 Nov, 2020
Received 30 Oct, 2020
On 29 Oct, 2020
Invitations sent on 29 Oct, 2020
On 29 Oct, 2020
Received 29 Oct, 2020
On 27 Oct, 2020
On 26 Oct, 2020
On 26 Oct, 2020
Posted 01 Sep, 2020
Received 29 Sep, 2020
On 29 Sep, 2020
On 17 Sep, 2020
On 14 Sep, 2020
Received 14 Sep, 2020
Received 13 Sep, 2020
Invitations sent on 31 Aug, 2020
On 31 Aug, 2020
On 19 Aug, 2020
On 18 Aug, 2020
On 18 Aug, 2020
On 17 Aug, 2020
On 21 Nov, 2020
On 18 Nov, 2020
Received 11 Nov, 2020
On 01 Nov, 2020
Received 30 Oct, 2020
On 29 Oct, 2020
Invitations sent on 29 Oct, 2020
On 29 Oct, 2020
Received 29 Oct, 2020
On 27 Oct, 2020
On 26 Oct, 2020
On 26 Oct, 2020
Posted 01 Sep, 2020
Received 29 Sep, 2020
On 29 Sep, 2020
On 17 Sep, 2020
On 14 Sep, 2020
Received 14 Sep, 2020
Received 13 Sep, 2020
Invitations sent on 31 Aug, 2020
On 31 Aug, 2020
On 19 Aug, 2020
On 18 Aug, 2020
On 18 Aug, 2020
On 17 Aug, 2020
Background Aging populations are often accompanied by comorbidity and polypharmacy, leading to increases in adverse drug reactions (ADRs). We sought to evaluate the causes and characteristics of ADRs in older Korean adults (≥ 65 years) in comparison to younger individuals (< 65 years).
Methods Of 37,523 cases reported at a Korean pharmacovigilance center from 2011 to 2018, we reviewed 18,842 ADRs of certain or probable causality on the basis of WHO-UMC criteria. Subjects exposed to major culprits were extracted from cohorts transformed to the Observational Medical Outcomes Partnership Common Data Model during the study period.
Results In total, 4,152 (22.0%) ADRs were reported for 3,437 older adults (mean age, 74.6 years and 57.3% female). Tramadol (rate ratio, 1.32; 95% confidence interval [CI], 1.21–1.44; P < 0.001) and fentanyl (1.49, 1.16–1.92, P = 0.002) posed higher risks of ADRs in the older adults, whereas nonsteroidal anti-inflammatory drugs (NSAIDs) (0.35, 0.30–0.40, P < 0.001) and iodinated contrast media (ICM) (0.82, 0.76–0.89, P < 0.001) posed lower risks. Ratios of serious ADRs to NSAIDs (odds ratio, 2.16; 95% CI, 1.48–3.15; P < 0.001) and ICM (2.09, 1.36–3.21, P = 0.001) were higher in the older adults than in the younger patients. Analgesics primarily elicited cutaneous ADRs in the younger patients and gastrointestinal reactions in the older adults. ICM more commonly led to anaphylaxis in the older adults than the younger patients (3.0% vs. 1.6%, P = 0.019).
Conclusion For early detection of ADRs in older adults, better understanding of differences in the causes and characteristics thereof in comparison to the general population is needed.

Figure 1

Figure 2
This is a list of supplementary files associated with this preprint. Click to download.
Loading...