Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.
a result produced by an action.
additive effect the combined effect produced by the action of two or more agents, being equal to the sum of their separate effects.
adverse effect a symptom produced by a drug or therapy that is injurious to the patient.
Bainbridge effect Bainbridge reflex.
Bohr effect decreased affinity of hemoglobin for oxygen caused by an increase of carbon dioxide; the oxyhemoglobin dissociation curve is displaced to the right because of higher partial pressure of carbon dioxide and lower pH. See also Haldane effect.
Crabtree effect the inhibition of oxygen consumption on the addition of glucose to tissues or microorganisms having a high rate of aerobic glycolysis; the converse of the Pasteur effect.
cumulative effect the action of a drug or treatment resulting from repeated use.
Doppler effect see doppler effect.
experimenter e's demand characteristics.
extrapyramidal e's the side effects caused by neuroleptic medications, including dystonias, parkinsonism, akathisia, and tardive dyskinesia.
Haldane effect increased oxygenation of hemoglobin promotes dissociation of carbon dioxide; see also Bohr effect.
Hawthorne effect a psychological response in which the subjects in a research study change their behavior simply because they are subjects in a study, not because of the research treatment.
heel effect variation in x-ray beam intensity and projected focal spot size along the long axis of the x-ray tube from cathode to anode.
parallax effect the position of the image on each emulsion of dual emulsion film; it is accentuated by tube-angled x-ray techniques.
Pasteur effect the decrease in the rate of glycolysis and the suppression of lactate accumulation by tissues or microorganisms in the presence of oxygen.
photoelectric effect ejection of electrons from matter as a result of interaction with photons from high frequency electromagnetic radiation, such as x-rays; the ejected electrons may be energetic enough to ionize multiple additional atoms.
placebo effect the total of all nonspecific effects, both good and adverse, of treatment; it refers primarily to psychological and psychophysiological effects associated with the caregiver-patient relationship and the patient's expectations and apprehensions concerning the treatment. See also placebo.
position effect in genetics, the changed effect produced by alteration of the relative positions of various genes on the chromosomes.
pressure effect the sum of the changes that are due to obstruction of tissue drainage by pressure.
proarrhythmic effect any new, more advanced form of arrhythmia caused by an antiarrhythmic agent, especially those that produce hemodynamically important symptoms. These arrhythmias occur less than 30 days after initiation of treatment and are not due to a new event such as acute myocardial infarction or hypokalemia.
side effect a consequence other than that for which an agent is used, especially an adverse effect on another organ system.
Somogyi effect see somogyi effect.
ad·verse ef·fect(ad'vers e-fekt'),
a result of drug or other therapy in addition to or in extension of the desired therapeutic effect; usually but not necessarily, connoting an undesirable effect. Although technically the therapeutic effect carried beyond the desired limit (for example, a hemorrhage from an anticoagulant) is a side effect, the term more often refers to pharmacologic results of therapy unrelated to the usual objective (for example, a development of signs of Cushing syndrome with steroid therapy).
Synonym(s): side effect
Adverse EffectMalpractice An injury caused by medical management—rather than by the underlying disease—which prolongs hospitalization, produces a disability at the time of discharge, or both.
Aetiology Drug effects, wound infections, technical complications, negligence, diagnostic or therapeutic mishaps, and events occurring in A&E.
Therapeutics An undesirable and unintended, although not necessarily unexpected, result of therapy or other intervention—e.g., headache following spinal tap or intestinal bleeding associated with aspirin therapy.
Toxicology An abnormal or harmful effect on an organism due to exposure to a chemical or noxious substance. Adverse events cause functional or anatomic damage, irreversible changes in homeostasis, or increased susceptibility to other chemical or biologic stress.
Clinical findings Change in food or liquid consumption, body or organ weight, enzyme activity, visible illness or death. Nonadverse effects usually fade when the organism is distanced from the toxin.
Trial Any undesirable symptom, occurrence or effect which a trial subject experiences during the trial, which may or may not be related to the study agent or intervention.
Examples Unfavourable and unintended reactions or findings—e.g., abnormal lab results, symptoms, or disease temporally associated with the use of a medicinal (investigational) product, whether or not it actually is related to the product.
The term adverse effect is often used interchangeably with adverse reaction, which might be better reserved for clinical phenomena occurring during drug treatment when causality cannot be or is not ascertained.
adverse effectPharmacotherapy An undesirable and unintended, although not necessarily unexpected, result of therapy or other intervention–eg, headache following spinal tap or intestinal bleeding associated with aspirin therapy Toxicology An abnormal or harmful effect on an organism due to exposure to a chemical or noxious substance; AEs cause functional or anatomic damage, irreversible changes in homeostasis, or ↑ an organism's susceptibility to other chemical or biologic stress Clinical Change in food or water consumption, body or organ weight, enzyme activity, visible illness or death
ad·verse ef·fect(ad'vers e-fekt')
1. Result of drug or other therapy in addition to or in extension of the desired therapeutic effect; usually but not necessarily, connoting an undesirable effect.
2. Although technically the therapeutic effect carried beyond the desired limit (e.g., a hemorrhage from an anticoagulant) is a side effect, the term more often refers to pharmacologic results of therapy unrelated to the usual objective (e.g., a development of signs of Cushing syndrome with steroid therapy).
Synonym(s): side effect.
Synonym(s): side effect.
Patient discussion about adverse effect
Q. Will there be any adverse effect? I am planning to start on multi vitamin tablets and want to know will it be beneficial and will there be any adverse effect?
A. Yes….go ahead and have them…..keep it less initially…..slowly increase 2 then 3 then ....decrease to one per day. You will find your hair and nails beautiful. You will sleep better. It will fill your vitamin gap in nutrition and if it exceeds it will be thrown out of body.More discussions about adverse effect