Detection Windows The window to detect the presence of a particular drug in a personâs urine is highly dependent on multiple factors, such as: Hydration-More dilute urine from high fluid intake may cause dilution of drug and therefore a negative result due to levels present but below the cutoff.
Alcohol flush reaction. Alcohol flush reaction is a condition in which an individual develops flushes or blotches associated with erythema on the face, neck, shoulders, and in some cases, the entire body after consuming alcoholic beverages.
Alcohol: Facial flushing may occur after alcohol consumption. This is because alcohol causes the blood vessels to expand. As a result, more blood flows to the face. For unknown reasons, people of Asian decent are more likely to experience alcohol-induced facial flushing.