My first thought when I watched is that Joyce is connected in some way to the pharmacist. She saw something in the info, and seemed alarmed. I wonder if she is related to the pharmacy owner somehow - Faisal just manages the shops, doesn’t he, for his uncle (I think)?
re: Faisal and the air embolus, there was definitely quite a significant bit on how he always wanted more, to be a doctor, but couldn’t afford the training, so I’d guess he has either done partial training and dropped out, or extra training at some point which would give him the skills.