Research has confirmed the observation that women become more impaired than men after drinking similar quantities of alcohol.

Research has confirmed the observation that women become more impaired than men after drinking similar quantities of alcohol. In addition, women appear to be more susceptible than men to alcohol's long-term health meanings (e.g., alcoholic liver disease). The prevalence of chronic alcohol-related riddles is significantly lower among women however, perhaps in part because and nothing else 2 percent of American women are heavy drinkers,(1) compared with 9 percent of men (Substance Abuse and Mental Health Services Administration 1998) Studies report adverse forces in men and women at level moderate drinking levels.(2) Among those events are disturbances of sensory information processing, short-term memory, reaction time, and eye-hand coordination. These deficits can impair the ability to drive a motor vehicle and may persist to the following day, impeding one's performance at work. The potential influence of form relative to sex on the acute effects of alcohol is therefore of importance for the large number of women who are social drinkers.

This article reviews research in succession the differential effects of moderate drinking onward men and women and the mechanisms that may underlie these differences. These mechanisms fall into brace categories: (1) gender differences in the physiological processing and elimination of alcohol (i.e., alcohol pharmacokinetics) and (2) differential sensitivity of the nervous order to alcohol's effects. Finally, the article evaluates data upon the influence of the menstrual period and female reproductive hormones onward the pharmacokinetics and nervous arrangement effects of alcohol.

OVERVIEW OF ALCOHOL PHARMACOKINETICS

family alcohol concentration (BAC) is determined by means of the rate of alcohol absorption from the gastrointestinal (GI) tract into the bloodstream, the convolution of distribution in the carcass and the rate of elimination. Absorption and distribution determine the proportion of an ingested put drugs into or other chemical substance that reaches the organs (alcohol bioavailability), where it may subsequently set to work its effects. Alcohol is eliminated from the corpse largely by a metabolic proces called oxidation, which appears mostly in the liver. about oxidation of alcohol also present itselfs during the absorption phase, thereby affecting the bioavailability of alcohol.

Absorption and Distribution

Alcohol consum by the agency of mouth is rapidly absorbed into the bloodstream from the stomach and small intestine. The rate of absorption of alcohol hangs on several factors, including the amount and concentration of alcohol ingested and the quantity and composition of diet in the stomach. Alcohol absorbed from the small intestine springs through the portal vein directly to the liver, where a portion of the alcohol is metabolized. The proces according to which a substance is metabolized before entering the general circulation is called first-pass metabolism (FPM)

Many toxic substances endure hepatic FPM. In the first grade of hepatic FPM of alcohol, an oxidative enzyme called alcohol dehydrogenase (ADH) change the heart ofs alcohol into acetaldehyde.(3) Hepatic FPM is principally significant with low to moderate alcohol doses of about 04 grams by kilogram of body weight (g/kg) which is equivalent to about pair standard drinks(4) for a one weighing 70 kg (approximately 150 pounds) The volume of FPM in the liver be pendents on the rate of absorption of alcohol from the GI tract. If absorption is fast, the quantity of alcohol reaching the liver can exce the metabolic capacity of available ADH. This allows a greater proportion of alcohol to escape FPM and reach the general circulation, resulting in a higher peak BAC. reciprocally slow absorption leads to a higher FPM and a lower peak BAC. For example, the personality of food in the stomach leads to slower alcohol absorption, hence more efficient FPM and a lower peak BAC. The time from last drink to peak BAC usually ranges from 30 to 90 minutes (Hardman and Limbird 1995)

near FPM may occur in the GI tract (mostly in the stomach) as well as in the liver (Yin et al. 1997) Although earlier research reported decreased gastric ADH activity in women compared to men (Frezza et al. 1990) the relative contribution of gastric ADH activity to overall FPM in the two genders is controversial. One subject of attention found the activity of gastric ADH in the rat to be approximately 14 percent that of hepatic ADH (Lee et al. 1992) Another meditation estimated that gastric FPM in humans accounts for 04 percent of a soft alcohol dose, compared with 4 percent metabolized in the liver (Derr 1993)

The portion of alcohol that is absorbed from the GI method and that escapes FPM chronicles the general circulation and is rapidly distributed everywhere the body, preferentially in material part water (i.e., within the bloodstream and in the fluid within and between cells) Studies onward alcohol pharmacokinetics must therefore take into account subjects' material part compositions, a significant factor in gender-related studies.

Elimination

Alcohol can be oxidized from ADH in various organs, including the stomach and small intestine. Quantitatively, however, greatest in number alcohol metabolism occurs in the liver. Between 90 and 98 percent of alcohol that go intos the body is eventually completely oxidized. The rate of alcohol metabolism is related to vital current alcohol concentration (BAC). At BACs below approximately 002 percent(5) the rate of alcohol metabolism is exponential. At higher BACs, the functional capacity of the ADH theory becomes saturated, and the alcohol elimination rate remains relatively constant between approximately 0020 and 0065 percent BAC. The rate of elimination of larger doses of alcohol increases as BAC increases (Holford 1987; Lundquist and Wolthers 1958)