In general your preparation for Life Science Consulting should not differ from a methodological perspective. However, you should try to have a good understanding of what a life science practice of an external consulting firm (e.g. MBB) covers or what focus areas an inhouse consulting company has (e.g. Bayer Business Consulting). Ususally you can find this information online on the company websites. In addition, some high-level recommendations:
I hope this short reply is already helpful. Good luck for your interviews!
Besides the resources already pointed out above, you can also find some life science cases in the case books for the most well-known US universities (googling for it) - however, most of them are around pharmaceutical companies.
If you search for the case questions for LEK in Glassdor, you will also find several cases (without solutions though).