A38-year old man who worked as a tractor-trailer driver was on a cross-country trip. he was brought to the hospital with restlessness, feelings of anxiety, hypertension, and increased respirations. mr. turner admitted to using "a little extra " with making his delivery on time. it is obvious mr. turner has abused a cns stimulant.

The question is incomplete; the last part is as below;

What are the most commonly used CNS stimulants?

The answer is “Amphetamines, methylphenidate, caffeine and cocaine”.   

Central nervous system stimulants or as known for short CNS stimulants which are basic in clinical practice, and have a high potential for manhandle. Psychomotor stimulants for example as mentioned above, cocaine and amphetamines increment sympathetic nervous system movement. Competition for different metabolic and transport procedures can prompt risky medication associations.  

the correct answer is a