We shall entirely disregard the physician who becomes addicted to the use of drugs through unworthy tendencies, and consider only the dangers to the profession and the public latent in the case of the physician who becomes addicted in the less reprehensible, but more dangerous, manner that I have indicated. Not only will such a drug addiction injure the doctor's practice and threaten his career, but it will surely constitute a threat against the welfare of his patients not included in the possibility that through it he may miss engagements, write improper prescriptions, and make mistakes of many kinds. THE DRUG-TAKING PHYSICIAN A MENACE A very serious danger lies in the psychology of drug addictions. The person who has taken a habit-forming drug for the purpose of relieving his own pain, and through it has found that relief which he sought, is almost certain to become abnormally sympathetic to the suffering of others. It is a curious fact that this doctor will be more than likely to administer the drug he uses to his patients, not with malicious, but with probably friendly, intent, and that he will feel no scruples whatsoever in acting as a go-between for drug-users in general who find themselves unable to obtain supplies easily. He will do what he can to help confirmed users to obtain their drugs, even if he makes no profit out of it. He will write prescriptions for them in evasion, if not in violation, of the law. It is a curious and tragic fact that the drug-taking doctor will spread the habit in his own family. There have been many instances in my hospital when I have had a physician and his wife as patients at the same time and on the same floor. In every one of these instances the drug addiction of a wife has been the direct result of constant association with the drug-addicted husband. No more dangerous detail exists in the psychology of drug-users than their almost invariable tolerance for the habit in others and their sympathetic willingness to promote its spread among those who suffer pain. In the under-world the drug habit never travels alone. Through it the woman who is a drug-user holds the man whom she desires; through it the male drug-taker holds the woman whose companionship he finds agreeable. It is a curious fact that while in the under-world the drug habit has become a social vice, especially in the case of cocaine, and is frequently a proof of mixed sex-relations, in the upper-world it is accompanied by a secrecy of method and sequestration of administration that characterizes no other form of vice.