In radiology, the threshold dose is the smallest dose of radiation that will produce a specified effect. In the larger context of toxic exposure, threshold dose refers to the dose below which no harm is done. There is a threshold below which relatively...

The minimum amount of a substance or numbers of pathogenic organisms that are capable of producing an effect. In terms of radiation the effective dose is that calculated to have been received by a person allowing for differential absorption and effects...

An effective dose in pharmacology is the amount of drug that produces a therapeutic response in 50% of the people taking it, sometimes also called ED-50. In radiation protection it is an estimate of the stochastic effect that a non-uniform radiation...

HALEH V. SAMIEI, WASHINGTON POST NEWS SERVICE The Record (Bergen County, NJ) 04-21-2003 Anticoagulants are less effective at lowered dose By HALEH V. SAMIEI, WASHINGTON POST NEWS SERVICE Date: 04-21-2003, Monday Section: HEALTH Edtion: All Editions.=.Late Edition. Early Edition Column: QUICK STUDY...

Midway through a flu season that has been mild after the initial panic over a possible vaccine shortage, the federal Centers for Disease Control and Prevention are reminding the public that flu cases usually peak this month or next. Since we're not out of...

Common children's cold and cough medicines are coming under scrutiny from federal drug regulators, who say the remedies and their recommended doses have not been studied enough in children, a newspaper reported.Dr. Charles J. Ganley, a top Food and Drug Administration official, said the agency...

U.S.government health officials began cracking down Wednesday on Internet sales of custom-mixed hormones for menopausal women, a market created when doctors deemed prescription estrogen therapy too risky for many patients.But the Food and Drug Administration says these alternative hormone mixes are no safer, and the...