Final answer:
During the Prohibition era, there was a loophole that allowed physicians to prescribe and pharmacies to dispense alcohol for 'medicinal purposes.' Reformers sought to close this, but faced opposition from the American Medical Association. Ownership restrictions were not explicit, but related laws led to unintended consequences.
Step-by-step explanation:
The question seems to be asking about who, within the context of historical regulations, was prohibited from owning a pharmacy. During the Prohibition era in the United States, laws were enacted that restricted the ownership and sale of alcohol. However, these laws unintentionally created a loophole where physicians could prescribe alcohol, and consequently, pharmacies could dispense it for 'medicinal purposes.' The information provided suggests that some reformers wanted to close this loophole, but various groups, such as the American Medical Association, opposed further restriction because it could lead to more government control over medical prescriptions. Thus, most regulations did not explicitly prohibit individuals from owning pharmacies, but they did instigate unintended consequences and inconsistencies in law enforcement, particularly concerning the sale of alcohol during Prohibition.