Which of the following medications is not commonly used in the treatment of alcohol abuse?

Buprenorphine is primarily used in the treatment of opioid use disorders rather than alcohol abuse. It is a partial opioid agonist designed to reduce withdrawal symptoms and cravings associated with opioid dependence. In contrast, the other medications listed are specifically designed to address alcohol use disorders.

Disulfiram functions by causing unpleasant reactions when alcohol is consumed, promoting abstinence. Naltrexone works by blocking the euphoric effects of alcohol and reducing cravings. Acamprosate helps to stabilize mood and reduce cravings following alcohol cessation. Each of these medications directly targets mechanisms related to alcohol consumption and has a role in the treatment of alcohol use disorders, which is why they are considered relevant in that context.