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side ef·fect
/ˈsīd əˌfek(t)/noun
- 1. a secondary, typically undesirable effect of a drug or medical treatment: "many anticancer drugs now in use have toxic side effects"
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In medicine, a side effect is an effect, whether therapeutic or adverse, that is unintended; although the term is predominantly employed to describe adverse effects, it can also apply to beneficial, but unintended, consequences of the use of a drug .
An adverse effect is an undesired harmful effect resulting from a medication or other intervention, such as surgery. An adverse effect may be termed a " side effect ", when judged to be secondary to a main or therapeutic effect .
An adverse drug reaction ( ADR) is a harmful, unintended result caused by taking medication. [1] : 1.1 Adverse Drug Reaction (ADR) [2] ADRs may occur following a single dose or prolonged administration of a drug or may result from the combination of two or more drugs. The meaning of this term differs from the term "side effect" because side ...
What constitutes a therapeutic effect versus a side effect is a matter of both the nature of the situation and the goals of treatment. No inherent difference separates therapeutic and undesired side effects; both responses are behavioral/physiologic changes that occur as a response to the treatment strategy or agent.
Vaccine injury. Specialty. Emergency medicine. A vaccine adverse event (VAE), sometimes referred to as a vaccine injury, is an adverse event believed to have been caused by vaccination. [1] The World Health Organization (WHO) knows VAEs as Adverse Events Following Immunization ( AEFI ).
Common side effects include indigestion, trouble sleeping, sexual dysfunction, loss of appetite, nausea, diarrhea, dry mouth, and rash. Serious side effects include serotonin syndrome, mania, seizures, an increased risk of suicidal behavior in people under 25 years old, and an increased risk of bleeding.
Adverse effects. The adverse side effects of amphetamine are many and varied, and the amount of amphetamine used is the primary factor in determining the likelihood and severity of adverse effects. Amphetamine products such as Adderall, Dexedrine, and their generic equivalents are currently approved by the USFDA for long-term therapeutic use.
Common side effects of valproate include nausea, vomiting, somnolence, and dry mouth. Serious side effects can include liver failure, and regular monitoring of liver function tests is therefore recommended. Other serious risks include pancreatitis and an increased suicide risk.
The most common side-effects of benzodiazepines are related to their sedating and muscle-relaxing action. They include drowsiness , dizziness, and decreased alertness and concentration. Lack of coordination may result in falls and injuries particularly in the elderly.
An adverse event ( AE) is any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. An adverse event can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding), symptom ...