Adverse reaction to medication
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Understanding Adverse Reactions to Medication
Definition and Classification of Adverse Drug Reactions (ADRs)
Adverse drug reactions (ADRs) are harmful or unintended responses to medications administered at standard doses for prophylaxis, diagnosis, or treatment Vervloet1998Alomar2014. ADRs can be broadly classified into two categories: those that may occur in anyone and those that occur only in susceptible individuals Vervloet1998Alomar2014. The World Health Organization (WHO) further classifies ADRs into six types: dose-related (Augmented), non-dose-related (Bizarre), dose-related and time-related (Chronic), time-related (Delayed), withdrawal (End of use), and failure of therapy (Failure) .
Prevalence and Impact of ADRs
ADRs are a significant public health issue, contributing to morbidity and mortality worldwide. They are responsible for 3-5% of hospital admissions and occur in 10-20% of hospital inpatients . In primary care settings, ADRs are also prevalent, with common reactions affecting the central nervous system, gastrointestinal system, and cardiovascular system . Studies have shown that antibiotics and non-steroidal anti-inflammatory drugs are frequently implicated in ADRs Vervloet1998Bajorek2019.
Common Causes and Mechanisms
The most common causes of ADRs include drug-related factors and allergies . Predictable drug reactions, such as side effects, toxicity, and drug interactions, can often be anticipated during therapy planning . However, unpredictable reactions, including allergic responses and idiosyncratic reactions, pose a greater challenge. These unpredictable reactions can be severe and life-threatening, often mediated by immune mechanisms or pharmacogenetic variations .
Management and Prevention of ADRs
Effective management of ADRs involves the withdrawal of the offending drug, if possible, and specific treatment of its effects . Surveillance and reporting systems are crucial for detecting ADRs and establishing causality . Preventive measures include careful prescription practices, patient education, and monitoring for early signs of adverse reactions Konduru2015Shan2023. Pharmacovigilance plays a vital role in assessing the risk factors and implementing strategies to minimize ADRs .
Conclusion
ADRs are a common and significant issue in clinical practice, affecting patient safety and healthcare outcomes. Understanding the types, causes, and mechanisms of ADRs is essential for effective management and prevention. Continuous monitoring, reporting, and education are key strategies to mitigate the impact of ADRs on patients and the healthcare system.
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Adverse drug reactions in primary care: a scoping review
Adverse drug reactions in primary care are mainly caused by drug-related and allergy-related factors, with common reactions affecting the central nervous system, gastrointestinal system, and cardiovascular system.
Factors affecting the development of adverse drug reactions (Review article).
Factors such as age, alcohol intake, gender, race, pregnancy, and drug dose significantly impact the occurrence of Adverse Drug Reactions, enabling healthcare professionals to choose the most appropriate medication for each patient.
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