For measuring the level of<unk><unk>  to alcohol, the most accurate method is to determine the level of acetaldehyde in the blood stream. This can be measured through a breathalyzer test or blood test. Additionally, measuring the amount of alcohol metabolizing enzymes alcohol dehydrogenases and aldehyde dehydrogenase through genetic testing can predict the amount of<unk>  that one would have.
Alcohol flush reaction
Cannabinoid hyperemesis syndrome
Alcohol withdrawal syndrome
Post-acute-withdrawal syndrome
Nicotine withdrawal
Drug withdrawal
Poison ivy 
Opioid withdrawal