"Cocaine addiction is caused by the changes in the structure and function of the brain. When used, cocaine affects the central nervous system and increases the levels of the neurotransmitter dopamine. Eventually cocaine stops the natural process of dopamine production in the brain preventing it from being recycled back into the brain cells. The individual will require more and more cocaine in order to experience the good feelings they initially had, this is when treatment is recommended."
Tremors, psychosis and seizures are also experienced. These are not purely emotional. The babies I've witnessed and sent to NICU have seized and tremored. It's hellacious! Maybe their high pitched constant screaming is emotional, but I tend to think it is stimulated from physical discomfort.