Adverse drug reactions with oral anticoagulants: data from sicilian spontaneous reporting system database

Risks of oral anticoagulants: Analysis of adverse drug reactions reported to the Portuguese National Pharmacovigilance System

Cardiovascular diseases are the leading cause of death globally, making the use of oral anticoagulants for prevention increasingly important. Historically, warfarin has played a significant role in this context. In recent years, introduction of new oral anticoagulants, such as rivaroxaban, apixaban, dabigatran, and edoxaban, has been seen. This study evaluates the risk associated with the use of oral anticoagulants by analyzing spontaneous adverse drug reactions reported to the Portuguese Pharmacovigilance System from 2012 to 2021. The study includes 951 adverse drug reactions reports, with the majority (n = 770; 80.97%) classified as serious. Of the 770 serious adverse drug reactions reports, the most commonly reported seriousness criterion was "Clinically Important" (n = 350; 45.45%). In terms of demographics, there was a higher reporting rate among the elderly population, with a greater prevalence of females. The System Organ Class group with the highest number of adverse drug reactions was "Gastrointestinal disorders," with the most commonly reported Preferred Term being "Gastrointestinal hemorrhage," and dabigatran was the most frequently reported drug. In summary, oral anticoagulants have adverse drug reactions that require continuous monitoring. Accurate identification and monitorization of adverse drug reactions is an important starting point to improve drug safety in population.

Atrial fibrillation management in older hospitalized patients: Evidence of a poor oral anticoagulants prescriptive attitude from the Italian REPOSI registry

Atrial fibrillation (AF) prevalence increases in older patients which also show a high thromboembolic risk. Oral anticoagulants (OACs) are recommended to prevent cardioembolic events and direct oral anticoagulants (DOACs) improved anti-thrombotic treatment. However, the benefits/risks of anticoagulant in older patients still need to be completely defined. This retrospective observational study aimed to describe the treatment with OACs in older AF hospitalized patients, and to identify factors influencing OAC therapy or discontinuation using the REgistro Politerapie SIMI. Univariate and multivariate logistic regression models were applied to identify predictors of OACs treatment and discontinuation. Cox proportional hazards models were performed to evaluate one-year mortality by treatment groups. AF patients were 1,128(26.5 %) at discharge and 1,098(97.3 %) required OAC treatment; about half of them (N = 528;48.1 %) were no-OACs users; 236(21.5 %) and 334(30.4 %) used DOACs and VKA, respectively. Increasing DOACs use was observed during the study period. Predictors of OACs treatment were: BMI (OR:1.04; 95 %CI:1.01-1.07), Barthel index (OR:1.01; 95 %CI:1.01-1.02), medications number (OR:1.07; 95 %CI:1.01-1.13). Conversely, a lower probability was found in patients with a high CIR.S (OR:0.59; 95 %CI:0.36-0.97) and neoplasm (OR:0.57; 95 %CI:0.37-0.88). Hospital stay (OR:1.02; 95 %CI:1.01-1.05), neoplasm (OR:2.25; 95 %CI:1.07-4.70) and INR (OR:1.21; 95 %CI:1.05-1.40) increased OACs discontinuation. A lower discontinuation was observed in dyslipidemic patients (OR:0.18; 95 %CI:0.04-0.82) and heart failure (OR:0.38; 95 %CI:0.21-0.70). Among AF patients, 157(14.3 %) died during the follow-up year. Age (HR = 1.05; 95 %CI = 1.03-1.08) and CIR.S (HR = 2.54; 95 %CI = 1.53-4.21) were associated with a greater mortality risk. In conclusion, critical issues related to the underuse and discontinuation of OACs therapy in hospitalized older patients were highlighted.

Thromboembolic Events Associated with Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitors: A Pharmacovigilance Analysis of the US FDA Adverse Event Reporting System (FAERS) Database

BACKGROUND AND OBJECTIVES

Although thromboembolic events (TEEs) have been reported with the use of epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs), their association remains largely unknown. In this study, we aimed to provide a comprehensive review of TEEs associated with EGFR-TKIs.

METHODS

We collected EGFR-TKIs (gefitinib, erlotinib, afatinib, and osimertinib) adverse reaction reports from 2015 Q1 to 2023 Q1 from the US Food and Drug Administration (FDA) Adverse Event Reporting System (FAERS) database. Disproportionality analysis was conducted to identify thromboembolic adverse events associated with EGFR-TKIs by comparing them with the overall FAERS database according to the reporting odds ratio (ROR). Associated factors were explored using univariate logistic regression.

RESULTS

We identified 1068 reports of TEEs associated with EGFR-TKIs (1.24% accounts for all TEEs). Affected patients were females (49.72%) and those older than 65 years (41.20%). The reported TEE case fatality was 30.24%. The median time to onset (TTO) of all cases was 39 days [interquartile range (IQR) 11-161], and the median TTO of fatalities [31 days (IQR 10-116)] was significantly shorter than that of non-fatal cases [46 days (IQR 12-186)].

CONCLUSION

This study yielded three key findings. Firstly, EGFR-TKIs seem to exhibit prothrombotic effects, elevating the risk of TEEs. Secondly, the clinical outcomes of TEEs associated with EGFR-TKIs were poor. Thirdly, most TEEs occurred within the initial 3 months, and fatal cases occurred earlier than non-fatal cases.

Prescriptive behavior of non-vitamin K oral anticoagulants in patients affected by atrial fibrillation in general practice

Atrial fibrillation (AF) is the most common cardiac arrhythmia worldwide and in recent years the pharmacological approach has been strongly implemented; in Italy, the prescription of the non-vitamin K oral anticoagulants (NOAC) was also extended to General Practitioners (GPs) since 2020. The aim of the present study was to investigate the GPs prescribing behaviour of NOACs. An observational study was performed by using the computerized medical record of 14 GPs in Sicily: patients affected by AF were selected and stratified according to the prescribed antithrombotic drugs. Patients were considered inadequately managed if antithrombotic treatment was not adherent to recent ESC guidelines. A total of 467 (2.7 %) patients were affected by AF, 276 (59.1 %) were treated with an oral anticoagulant (OAC) regardless the high stroke risk (OR 1.64; 95 %CI 0.74-3.62; p = 0.226). The NOAC users were 236 patients as follow: Rivaroxaban 33.5 %, Apixaban 33,1 %, Dabigatran 17,4 %, Edoxaban 16.1 %. In 7 patients an inappropriate NOAC treatment was observed. Among Vitamin-K antagonist users, 25.0 % were considered inappropriate. Patients not treated with OAC were 191, of them 81.7 % were at high stroke risk and did not receive any OAC despite the indication to treat. In addition, the probability to be not properly managed significantly increased in older and in patients with atherosclerosis. Conversely, patients with at least one reported cardiology counselling significantly reduced the likelihood to be not properly managed (OR 0.38, 95 %CI 0.25-0.58; p 0.01). Our results suggest the need to optimize the management of real-life AF patients by improving prescribing adherence to ESC guidelines.

Safety profile of tyrosine kinase inhibitors used in non-small-cell lung cancer: An analysis from the Italian pharmacovigilance database

Introduction

Non-small cell lung cancer (NSCLC) is often caused by molecular alterations that can be detected by predictive biomarkers including mutations or amplifications of several genes. Several tyrosine kinase inhibitors (TKIs) have been approved in Europe by the European Medicines Agency (EMA) for NSCLC. The aim of this study was to analyze the onset of adverse drug reactions (ADRs) related to TKIs in NSCLC through a spontaneous reporting system (SRS) database.

Methods

All ADR reports having as suspected drug afatinib (AFT), alectinib (ALEC), brigatinib (BRG), ceritinib (CER), crizotinib (CRIZ), erlotinib (ERL), gefitinib (GEF), lorlatinib (LORL), nintedanib (NTB), and osimertinib (OSI) recorded into the Report Reazioni Avverse dei Medicinali (RAM) system database for national data and into the Italian SRS database for Sicilian data and collected from 2006 to 2021 have been evaluated. A descriptive analysis of basal demographic and drug-related characteristics was performed. A case-by-case methodology was conducted paying particular attention to all serious ADR reports collected in Sicily, focusing on type of seriousness, age, sex, concomitant drugs, and comorbidities.

Results

Of the 3,048 Italian reports, most of ADRs were related to ERL (n = 1,448), followed by AFT (n = 435) and GEF (n = 366). ADR reports were slightly more frequent in females (52.2%) and in the age group >65 years (53.0%). A higher number of cases were related to skin disorders (n = 1,766; 57.9%), followed by gastrointestinal disorders (n = 1,024; 33.6%), general disorders and administration site conditions (n = 536; 17.6%), and infections (n = 483; 15.8%). The case-by-case assessment of Sicilian ADRs showed that 33 cases were serious (12.5%) and mainly involved ERL (n = 17; 51.5%), occurring in males with a higher onset of respiratory diseases (30.3%) such as respiratory failure, interstitial lung disease and dyspnea.

Discussion

The analysis of spontaneous ADR reports of TKIs confirmed, in general, well-known risks, which often include skin, gastrointestinal, general, liver, and respiratory diseases as well as infections. However, more attention should be paid to the occurrence of serious life-threatening ADRs including respiratory failure, interstitial lung disease, and cardiogenic shock, especially in young patients.

Adverse Drug Reactions with Drugs Used in Multiple Sclerosis: An Analysis from the Italian Pharmacovigilance Database

Given the importance of inflammation at the onset of multiple sclerosis (MS), therapy is mainly based on the use of anti-inflammatory drugs including disease modifying therapies (DMTs). Considering the recent approval of some DMTs, pharmacovigilance becomes a fundamental tool for the acquisition of new safety data. The aim of the study was to analyze adverse drug reactions (ADRs) related to the use of drugs approved for MS. All national publicly-available aggregated ADR reports recorded from 2002 to 2020 into the Reports of Adverse Reactions of Medicines (RAM) system and all complete Sicilian data reported into the Italian spontaneous reporting system (SRS) database having as suspected drugs interferon β-1a (IFN β-1a), interferon β-1b (IFN β-1b), peginterferon β-1a (PEG-IFN β-1a), glatiramer acetate (GA), natalizumab (NTZ), fingolimod (FNG), teriflunomide (TRF), dimethyl fumarate (DMF), alemtuzumab (Alem), ocrelizumab (OCZ), or cladribine (Cladr), were collected. Descriptive analyses of national, publicly-available aggregated data and full-access regional data were performed to assess demographic characteristics and drug-related variables followed by a more in-depth analysis of all Sicilian ADRs with a case-by-case assessment and a disproportionality analysis of unexpected ADRs. A total of 13,880 national reports have been collected from 2002 to 2020: they were mainly not serious ADRs (67.9% vs. 26.1%) and related to females (71.7% vs. 26.3%) in the age group 18–65 years (76.5%). The most reported ADRs were general and administration site conditions (n = 6,565; 47.3%), followed by nervous (n = 3,090; 22.3%), skin (n = 2,763; 19.9%) and blood disorders (n = 2,180; 15.7%). Some unexpected Sicilian ADRs were shown, including dyslipidemia for FNG (n = 10; ROR 28.5, CI 14.3–59.6), NTZ (n = 5; 10.3, 4.1–25.8), and IFN β-1a (n = 4; 8.7, 3.1–24.1), abortion and alopecia for NTZ (n = 9; 208.1, 73.4–590.1; n = 3; 4.9, 1.5–15.7), and vitamin D deficiency for GA (n = 3; 121.2, 30.9–475.3). Moreover, breast cancer with DMF (n = 4, 62.8, 20.5–191.9) and hypothyroidism with Cladr (n = 3; 89.2, 25.9–307.5) were also unexpected. The reporting of drugs-related ADRs in MS were mostly reported in the literature, but some unknown ADRs were also found. However, further studies are necessary to increase the awareness about the safety profiles of new drugs on the market.

Risk of Bleeding Associated with Antidepressant Drugs: The Competitive Impact of Antithrombotics in Quantitative Signal Detection

BACKGROUND

To date, disproportionality analysis has been unable to demonstrate the increased bleeding risk associated with antidepressant drugs, especially selective serotonin reuptake inhibitors.

OBJECTIVE

We hypothesised that a potential signal for an increased bleeding risk may be mitigated by the effects of agents other than antidepressant drugs that are strongly associated with haemorrhages, especially antithrombotics. In addition, we investigated if the use of more specific search terms of the Medical Dictionary for Regulatory Activities facilitates the detection of signals.

METHODS

Pharmacovigilance data from the Uppsala Monitoring Centre were used to calculate substance-specific reporting odds ratios (RORs) for all types of bleeding and gastrointestinal bleeding. Reporting odds ratios were calculated with and without antithrombotic comedication.

RESULTS

Regarding any type of bleeding, no signals were found in association with antidepressant drugs. Concerning upper gastrointestinal bleeding, signals were found related to citalopram (ROR: 1.56 [95% confidence interval 1.11-2.20]) and escitalopram (ROR: 1.52 [95% confidence interval 1.03-2.25]). After removal of reports related to antithrombotics, these signals could no longer be detected, but a new signal related to St. John's Wort associated with haemorrhages was found (ROR: 1.50 [95% confidence interval 1.21-1.86]).

CONCLUSIONS

Antithrombotics seem unlikely to have a major impact on the detection of the bleeding risk of antidepressant drugs. The different categorisation of adverse drug reactions regarding the strength of a causal relationship between a drug and an event in the database may be relevant for this negative finding.

Adverse Drug Reactions with HER2-Positive Breast Cancer Treatment: An Analysis from the Italian Pharmacovigilance Database

Background

Anti-HER2 therapy has evolved in the last years and an important role in this transformation was that of monoclonal antibodies and tyrosine kinase inhibitors. Considering their extended use in clinical practice, some toxicity problems have been highlighted around these drugs.

Objective

To analyze the onset of adverse drug reactions (ADRs) related to the use of HER2-positive breast cancer treatments through a spontaneous reporting system (SRS) database.

Methods

All ADR reports having as suspected drug trastuzumab, pertuzumab, lapatinib, or trastuzumab emtansine (TDM-1), recorded into the Report Reazioni Avverse dei Medicinali (RAM) system database for national data and into the Italian SRS database for Sicilian data and collected from 2006 to 2020 have been evaluated. A descriptive analysis of basal demographic and drug-related characteristics was performed. A case-by-case methodology was conducted paying particular attention to the serious ADR reports collected in Sicily, focusing on type of seriousness, age, sex, concomitant drugs, comorbidities, time to onset (TTO), and time to resolution (TTR).

Results

Of the 3609 Italian reports, 65.6% were related to trastuzumab (n = 2367), followed by pertuzumab, TDM-1, and lapatinib. Almost all reports occurred in female patients (94.3%) and were most frequent in the age group 18–65 years (69.6%). A higher number of cases were related to general disorders and administration site conditions (n = 1079; 29.9%), gastrointestinal disorders (n = 1037; 28.7%), skin disorders (n = 821; 22.7%), and blood disorders (n = 599; 16.6%). Cases involving trastuzumab and pertuzumab mainly reported general disorders (n = 788; 33.3% and n = 194; 32.1%, respectively) while more than half of the reports associated with lapatinib were related to gastrointestinal (n = 184; 59.7%) and skin diseases (n = 146; 47.4%). Regarding TDM-1, 40% of reports had at least one ADR belonging to blood and lymphatic system disorders. The case-by-case assessment of Sicilian ADR reports showed that 40 cases were serious (33.3%), with a median TTO of 37 (6–97) days. Serious ADR reports mainly involved the onset of thrombocytopenia (n = 8; 20.0%), diarrhea (n = 6; 15.0%), asthenia and cardiac failure (both with n = 5; 12.5%), vomiting, hypersensitivity, and ejection fraction decreased (all with n = 4; 10.0%) and stomatitis (n = 3: 7.5%).

Conclusion

This study is fundamentally consistent with results from the literature. Given the serious clinical condition of breast cancer and taking into account the importance of preventing some clinically relevant ADRs related to the use of anti-HER2 therapy, further analyses are essential to better describe the safety profile of these target therapies.

Supplementary Information

The online version contains supplementary material available at 10.1007/s40801-021-00278-z.