No, an employer may accept a negative/dilute test result as a negative test. If the employer wants a retest it may do so, however, it must be stated in the employer's policy and the employer must require a retest of all individuals that have a negative/dilute result in the same testing category.
Alcohol affects activity of such neurotransmitters as glutamate, GABA, and dopamine; caffeine blocks the action of the neurotransmitter adenosine. Such changes are studied in the field of psychopharamacology, which concerns the effects of drugs on the mind and brain. This field investigates both recreational drugs such as alcohol, caffeine, marijuana, cocaine, and LSD, and therapeutic drugs such as antidepressants and antipsychotics.
And long-term use has been proven to create a lifetime of physical and mental damage, a fact ignored by psychiatrists. Common and well-documented side effects of psychiatric drugs include mania, psychosis, hallucinations, depersonalization, suicidal ideation, heart attack, stroke and sudden death. Not only that, but The US Food and Drug Administration admits that probably one to ten percent of all the adverse drug effects are actually reported by patients or physicians.