An individual uses alcohol to relieve tension. When he first began self-medicating with alcohol, two
drinks made him relaxed and drowsy. Now, after 1 year, he needs four drinks to bring himself to the
same relaxed, drowsy state.
The reason for this is
a. the alcohol is less potent.
b. he is developing tolerance.
c. hypomagnesemia.
d. antagonistic effects.
B
Tolerance refers to needing higher and higher doses of a drug to produce the desired effect. Option
A: The potency of the alcohol is stable. Options C and D: Neither hypomagnesemia nor antagonistic
effects would account for this change.
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