Why prolonged stimulant use does not remove the need for sleep

What problems can arise when pilots take amphetamines for extended military operations?

Dr. Dan identifies an eventual need for sleep, an unpredictable crash, dependence, and impaired judgment.

Dr. Dan warns that a stimulant user still eventually needs sleep and can lose control of when exhaustion takes over. He also raises dependence and impaired judgment as concerns. His comparison with pilots and ground troops is qualified: heavily rehearsed reactions appear to him different from a destroyer captain's continuing need to weigh decisions. The return to naval command emphasizes experience and emotional control.