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.
Even minor and healthy emotional responses can trigger flushing in some individuals. Alcohol. Drinking alcoholic beverages can cause flushing through dilation of the blood vessels in the skin, related either to the alcohol itself or to acetaldehyde, a substance involved in metabolizing alcohol. In addition, fermented beverages such as wine contain other substances that affect blood vessel dilation and contribute to the flushing response.