If you are going to medicate at work (were talking retail not surgical here) here are a few tips.
1. Know how strong what you're about to eat is, you really don't want to overdo it. Edibles offer a discrete way to consume cannabis, but take longer to kick in then smoking/vaporizing and can effect you in different ways.
2. Dispensaries sell all sorts of options from the candies suggested above to the more traditional brownies and cookies. All of this is great until someone at work asks you for one of those yummy looking candies or a cookie. Plan ahead, have a few non-medicated look a likes handy for any coworkers with a sweet tooth.
3. Keep any food item with cannabis in it and no label locked up nice and safe. It's all fun and games until your Boss or whoever sneaks one of those delicious looking homemade candies you have been eating all week.