An adverse drug reaction (ADR) is an unintended medical event, which can potentially be associated with taking a medication. [1][2] It can be disadvantageous or beneficial for the patient.

Jan 6, 2026 · Care guide for Adverse Drug Reaction. Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.

Adverse drug reaction (also called adverse drug effect) is a broad term referring to an unintended effect of a medication that is undesirable, unpleasant, or harmful.

In this chapter, three groups of cutaneous adverse drug reactions (ADRs) are discussed: (i) severe ADRs; (ii) moderate or mild cutaneous ADRs, and (iii) ADRs caused by chemotherapy drugs.

Jan 28, 2026 · ADRs are unintended, harmful events occurring at normal therapeutic doses. They differ from medication errors or deliberate overdoses in that the prescribed dose is correct, but the patient …

Jan 11, 2026 · An adverse reaction is an undesirable reaction to a medication that's been taken correctly. It may occur immediately, hours, or years after starting a drug. Reactions might include …

Side effects, also known as adverse reactions, are unwanted undesirable effects that are possibly related to a drug. Side effects can vary from minor problems like a runny nose to...

Mar 16, 2023 · If you take prescription or over the counter medicines, be aware of possible drug reactions. Learn about drug interactions, side effects, and more.

Jan 1, 2024 · Medicines can have effects that differ from their intended therapeutic effect. A side effect is any effect caused by a drug other than the intended therapeutic effect, whether it be beneficial, …

An adverse drug reaction is a “response to a drug which is noxious and unintended and which occurs at doses normally used in man for prophylaxis, diagnosis, or therapy of disease or for the modification …