We have previously written about tablets for medical students, and why you might want one. If you're not sold on a top of the iPad Pro, consider this deal for an Amazon Fire Tablet Essentials Bundle (16GB):
In addition to a case, you should consider a Bluetooth keyboard. I'm personally a huge fan of the Kensington keyboard/case combo I got for my iPad Air 2, the Kensington Key Folio Thin X3:
It works great, is backlit, and last for almost a solid *year* on a single charge via microUSB. It has proven invaluable for taking notes and making the device more functional. The combination practically serves as a laptop replacement for most light to moderate computing tasks. Not to mention weighing a ton less! For any medical student with limited carrying / storage space, such a compact solution is a definite plus.