First of all, feel free to reach out, since I was preparing a couple of months ago a candidate precisel for pharma in-house consulting and she made it.
Furthermore, there are plenty of pharma cases (only Ctrol + F in most MBB casing books, that are available online).
In any case, the topic is not as important as the classical skillset your need for cases tbh, so prep with other types of cases also will be very helpful.
Finally, regarding FIT, the "Integrated FIT guide for MBB" has been recently published in PrepLounge´s shop (https://www.preplounge.com/en/shop/tests-2/integrated-fit-guide-for-mbb-34)
It provides an end-to-end preparation for all three MBB interviews, tackling each firms particularities and combining key concepts review and a hands-on methodology. Following the book, the candidate will prepare his/her stories by practicing with over 50 real questions and leveraging special frameworks and worksheets that guide step-by-step, developed by the author and her experience as a Master in Management professor and coach. Finally, as further guidance, the guide encompasses over 20 examples from real candidates.
Furthermore, you can find 3 free cases in the PrepL case regarding FIT preparation:
Feel free to PM me for disccount codes for the Integrated FIT Guide, since we still have some left from the launch!
Hope it helps!