b. A markedly diminished effect with continued use of the same amount of the
stimulant.
Note:  This criterion is not considered to be met for those taking stimulant medica-
tions solely under appropriate medical supervision, such as medications for atten-
tion-deficit/hyperactivity disorder or narcolepsy. 
11. Withdrawal, as manifested by either of the following: 
a. The characteristic withdrawal syndrome fo r the stimulant (refer to Criteria A and
B of the criteria set for stimulant withdrawal, p. 569).
b. The stimulant (or a closely related substance) is taken to relieve or avoid with-
drawal symptoms.