Hi there! Would you believe that I JUST solved this issue with not one but TWO of my kid sims. I think that it's a bug in the newest patch. What I did to fix this, is I went on to the game options, turned on whims, and when it will say 'take medicine' and although whims can be annoying (personally) but as soon as that comes, click the suggestion and they'll do it. Another question, if that doesn't work (because that only worked for one of my sims) is do you play with mods? I play with a LOT of mods, especially script mods...which can make your game crash and do weird things like that if you aren't careful! Can you tell me if you play with mods, and which ones. The ones I use are MC Command Center, slice of life, pregnancy mega mod, teen pregnancy, extreme violence, wicked whims, wonderful whims, disabilities and more traits. The one for me that made all this stuff happen was actually a mod which I have now deleted, it was called something like Teen Career Branches...idk never used it :) but come back to me quickly and I can tell you how to solve that issue is you use mods and cc :))) thankyouuuuuuuuu have a nice day and happy simming xx