I have been to Heidelberg a half dozen times, and had never bothered to go inside this museum at the castle. I was pleasantly surprised. While old pharmacy-type memorabilia might mostly appeal to pharmacists or people in the medical profession, there were other related items inside the museum that were interesting, and the place was much larger that it appeared outside. While most tourists likely have a list oof places to see and things to do that make it easy to eliminate an apothecary museum, you might find yourself surprised by even a brief visit here.