Drug lawyers represent those who have been accused of a crime of possession, manufacturing, or distributing drugs or other controlled substances.
Although the official position of the legal profession is that any lawyer admitted to practice law can, with sufficient study, take on just about any legal matter, it is a matter of common sense that experience is valuable and could form a reasonable basis to choose to hire a lawyer who specializes in drug cases.
Therefore, consider whether or not the lawyer you are thinking about has experience handling drug cases. Find out about how long he has been practicing law and what percentage of his practice is devoted to drug defense.
A lawyer who has been practicing for twenty years but has handled only one drug case is in a different position from a person who has been practicing for fewer years and has done nothing but drug defense. Whatever your decision would be, at least find out the information.
Find out whether the lawyer you are thinking about has specifically handled your particular kind of case before. Some kinds of cases tend be extremely specialized.