I'm not a practicing professional yet, but that said, I also have a sociology minor and am in my second semester of nursing school
. I think my sociology classes have helped me tremendously in understanding different kinds of patients I may be taking care of. Often we will be incorporating some of the same concepts in Health Promotion or one of the nursing theory courses and some people, who haven't taken sociology, seem to have trouble understanding how people's economic status, education level, environment, race, gender, and sexuality affect their health status and how they respond to the health care system. Go for it! I took a class called Marriage and Family, which is similar I think, and it was a really interesting course.
If you have a good professor, I don't think you'll regret it! The only reason why I ended up with a sociology minor is because I had to stay in school for a year while I waited to get into the program, and it opened up my eyes to a lot of issues people face that nurses have to work with when giving care.