side effect

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effect

 [ĕ-fekt´]
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.
The Bohr effect causing a shift to the right in the oxyhemoglobin dissociation curve.
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

side effect

n.
A peripheral or secondary effect, especially an undesirable secondary effect of a drug or therapy.

side effect

Any immediate or long-term adverse effect of a drug or therapy other than that intended, including headache, nausea, hair loss, skin irritation, and so on.

side ef·fect

(sīd 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.

side effect

Any effect of a drug or other treatment additional to the required effect. Most side-effects are unwanted and some are dangerous.

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.

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
References in periodicals archive ?
MDT introduction met with considerable resistance in Brazil because of a significant risk of side-effects. (11-14) Despite this, in 1991, MDT was adopted as the sole treatment for leprosy patients in Brazil.
A wide range of frequency of side-effects caused by MDT has been reported from Brazil.
This paper reports side-effects attributed to MDT, the frequency and stoppage of the MDT components in a Health Unit in Vitoria, Brazil.
A specific questionnaire was prepared to collect data from the patient records, and detailing occurrence of side-effects and stoppage of the drug because of side-effects.
Side-effects attributed to MDT were defined as the presence of undesirable secondary effects of onset after the start of MDT.
Side-effects were attributed to at least one MDT component in 88 (45%) patients; 85 had side-effects due to dapsone, 24 due to rifampicin and 18 due to clofazimine.