Adverse Drug Reaction

Definition

An unintended and harmful response to a medication at normal therapeutic doses. ADRs range from mild (nausea, headache) to severe (anaphylaxis, organ damage). Type A reactions are dose-dependent and predictable; Type B reactions are idiosyncratic and unpredictable.

Verwandte Begriffe

In Leitfäden Erwähnt

• Common vs. Rare Side Effects
  Learn how drug side effects are classified by frequency, what 'common' and 'rare' mean in clinical terms, and how to …
• When to Call Your Doctor About Side Effects
  A practical framework for deciding when a medication side effect warrants a call to your doctor, an urgent care visit, …
• Drug-Induced Liver Injury (DILI)
  Drug-induced liver injury (DILI) is one of the most serious medication side effects and a leading cause of acute liver …
• Medications That Cause Weight Gain
  Many commonly prescribed medications cause weight gain as a side effect. This guide explains which drug classes are most often …
• Understanding QT Prolongation
  QT prolongation is a potentially life-threatening cardiac side effect caused by dozens of commonly prescribed medications. This guide explains what …
• Drug Allergies vs. Side Effects
  Not every bad reaction to a drug is an allergy. Learn the crucial differences between true drug allergies, side effects, …
• Sexual Side Effects of Medications
  Sexual dysfunction is a common but under-discussed medication side effect. Learn which drug classes are most likely to cause sexual …
• Skin Reactions from Medications
  Drug-induced skin reactions range from mild rashes to life-threatening conditions. Learn to recognize different types, understand when they are dangerous, …
• How to Report Side Effects (FDA MedWatch)
  Reporting medication side effects helps keep everyone safer. Learn how to use the FDA MedWatch system, what to report, and …
• How Cancer Chemotherapy Works
  Chemotherapy targets rapidly dividing cells — which is why it affects cancer, but also hair follicles and the gut lining. …
• How Vaccines Work (They're Drugs Too)
  Vaccines are regulated as biologic drugs and work by training the immune system to recognize specific threats. This guide explains …
• Understanding Black Box Warnings
  What a black box warning on a prescription drug label actually means, why it exists, and how patients and prescribers …
• Drug Safety After Approval (Post-Marketing)
  FDA approval is not the end of drug safety evaluation — it is the beginning of a new phase. Learn …
• Medications During Pregnancy
  A plain-language guide to how pregnancy changes drug safety, what the FDA pregnancy categories mean, and how to work with …
• Mental Health Medications and Weight
  Why many psychiatric medications cause weight gain, the mechanisms behind it, which medications carry the highest risk, and evidence-based strategies …
• Medications and Driving Safety
  Which medication categories impair driving ability, how drug-impaired driving is treated legally, and how to have safe conversations with your …