Miss. Code Ann. § 73-3-347

For the purposes of Sections 73-3-347 through 73-3-365 , the term “personally incapable” to practice law shall include: (a) suffering from mental or physical illness of such character as to render the person afflicted incapable of managing himself, his affairs or the affairs of others with the integrity and competence requisite for the proper practice of law; or (b) habitual use of alcoholic beverages or liquids of any alcoholic content, hallucinogens, sedatives, drugs, narcotics or other mentally or physically disabling substances of any character whatsoever to any extent which impairs or tends to impair the ability to conduct efficiently and properly the affairs undertaken for a client in the practice of law.