This made me larf:
"Ethical concerns have been raised about the morality of deliberately making clients experience unpleasant symptoms."
As if just thinking about the unpleasant symptoms is worse than actually experiencing them!
I particularly like the last paragraph:
"Recent research suggests that aversion therapy alone is not the most effective approach. Treatments that involve taking drugs such as antabuse tend to have high dropout rates. There is interest in creating new drugs that not only cause negative symptoms when mixed with alcohol, but also reward abstinence with pleasant feelings. A new drug might achieve this by increasing the levels of the neurotransmitter serotonin in those who remain abstinent. In sufficient doses, this hormone can create a sense of well being."
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