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.
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
The Bohr effect causing a shift to the right in the oxyhemoglobin dissociation curve.
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.
experimenter e's demand characteristics.
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.
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.
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.
Patient discussion about side effect
Q. Do they have any side effects? what are the benefit of drugs like Divalproex and Carbamazepine over lithium for acute mania patients? Do they have any side effects?
A. It’s a good drug for acute mania patients, but has not been found to be effective in patients with depression. Patients who did not not respond to lithium are benefitted by this. The side effects are weight gain and sedation, as well as multiple drug-drug interactions.
Q. Does it carry any side effects? I am pregnant and in my second trimester. I am having flu infections. I am prescribed with Sudafed. Does it carry any side effects?
A. sudafed is a symptomatical medication. and you can pass the flu without it. in it's instruction its recommended not to use it in pregnancy. so why use it? it's not like it's a life thretening situation and you can't survive without it. it's not worth the risk for the fetus if you ask me.
Q. Does Viagra have any side effects? My boyfriend started taking Viagra and now he has headaches. Could this be caused by the Viagra?
A. Yes, headaches are a side effect of Viagra. Other common side effects are facial flushing, upset stomach and a temporary bluish vision. If this persists, he should consult his Doctor. More discussions about side effect