 Because these tranquilizers' primary pharmacological and physiological effects stem from their manipulation of the GABA chemical and transmitter somatic system, the same neurotransmitter system affected by alcohol, delirium tremens can occur upon abrupt decrease of dosage in those who are heavily dependent.These DTs are much the same as those caused by alcohol and so is the attendant withdrawal syndrome of which they are a manifestation.That is the primary reason benzodiazepines are such an effective treatment for DTs, despite also being the cause of them in many cases.