Substance use disorders (SUD) are treated with a variety of pharmacological agents. For example, it is standard practice to see medications including clonidine, barbiturates, and benzodiazepines prescribed for acute withdrawal syndromes from alcohol, sedative-hypnotic medications, opioids, and nicotine. For later, maintenance phases of SUD treatment, there are at present a limited number of labeled medications. For maintenance-phase, alcohol-abuse...