A lot of drugs are potentially harmful and thus available only by prescription. The prescription represents a medical acknowledgement that the drug, in this case, would be medically beneficial to the person. But does that mean that morphine (or Levitra, or Zoloft, or most prescription drugs) should be freely available to all, because they might be beneficial to some? If alcohol were available only by prescription, and people could be prescribed a glass of wine a night for the heart benefits, fine with me.