Also, reading here, I get the sense that this isn't the first time minocycline has been used to aid sober decision making.

Scientists think the drug may clear the brain of distractions like, in this case, arousal, to improve focus for making rational decisions. And these scientists aren’t the first to show that the antibiotic has effects other than getting rid of zits. Other studies have demonstrated that minocycline can improve patients’ focus on social cues, encourage sober decision making and improve the symptoms associated with schizophrenia and depression.