Antidepressant withdrawal symptoms and their widespread recurrence, even when individuals step down their dose very gradually, is caused by the receptors in the serotonin system experiencing the drop in serotonin to pre-drug levels as starvation.
Some crack cocaine users become more sensitive to crack the longer they take the drug.
The most typical marijuana users among high school aged youth in the U.S. are 11th and 12th graders.
Research has found that alcohol consumed before a meal increases caloric intake to a far greater extent than a non-alcoholic carbohydrate drink.