additive effect


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Related to additive effect: antagonistic effect

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·di·tive ef·fect

an effect wherein two or more substances or actions used in combination produce a total effect, the same as the arithmetic sum of the individual effects.

additive effect

Etymology: L, additio, something added, effectus
the combined effect of drugs that, when used in combination, produce an effect that is greater than the sum of their separately measured individual effects.

Additive Effect

The biologic effect of combining 2 or more agents, in which there is a simple summation of the effects of the individual agents.
Cf Antagonistic, Synergism

ad·di·tive ef·fect

(ad'i-tiv e-fekt')
An effect wherein two or more substances or actions used in combination produce a total effect the same as the arithmetic sum of the individual effects.

ad·di·tive ef·fect

(ad'i-tiv e-fekt')
Any effect wherein two or more substances or actions used in combination produce a total effect.

effect

a result produced by an action. The relationship between the two can be expressed in linear form. The total association between them may be the sum of a number of effects. The effect may be direct when it is exerted without being transmitted through intervening factors, or indirect when it is. It may also be a spurious effect when the observed changes are due to causes and correlations common to both.

additive effect
the combined effect produced by the action of two or more agents, being equal to the sum of their separate effects.
Coolidge effect
the stimulation of sexual behavior in a male animal upon exposure to a new female.
cumulative effect
cumulation action.
experimenter e's
demand characteristics; the characteristics supplied by the experimental subject in response to what it perceives are the demands of the experimenter.
effect modifier
a factor which modifies the effect of a causal factor under study. Called also interaction.
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.
side effect
a consequence other than that for which an agent is used, especially an adverse effect on another organ system.
References in periodicals archive ?
The findings presented in the article are based on our meta-analytic research, studying the relationship between each of the four additive effect strategies and financial performance across organizations.
The two herbs with the highest antioxidant activities were separately added to the remaining three, resulting in six concoctions consisting of two herbs each, to observe any synergistic, antagonistic or additive effects.
Additive effect of pneumococcal vaccine and influenza vaccine on acute exacerbation in patients with chronic lung disease.
50] of 33 minutes being observed for Poly C as compared to the theoretical additive effect of the ascorbic acid and resveratrol.
Conclusions: Our findings suggest that NAC has an additive effect on the eradication rates of H pylori obtained with dual therapy with lansoprazole and clarithromycin.
While these two latter differences are relatively small, both are in the same direction as the percent change in number of applications and thus have an additive effect, so that the disparity between the two groups grows over the course of the rehabilitation process.
The studies demonstrated that VB-111 as a combined therapy with the chemotherapy doxorubicin in a Lewis Lung metastasis model showed additive effect compared to treatment with VB-111 alone.
They got more than the additive effect,'' Chiaro said.
He also deliberately consumed Phenobarbital, a drug which has significant additive effect on Demerol.
Kava, used as a relaxant, may have an additive effect when combined with the sedatives anesthesiologists often give patients before and during surgery.
H7-The additive effect of job demands, job control and job social supports predict levels of Somatic Symptoms, Job Anxiety and Turnover Intention better than does the main effect alone.