Since you are still a student (you are still in school no matter how you spin it cause pharmacy school involves 6 years unless you got grandfathered into a 5 year program. My mother and brother are pharmacists. , I always recommend all students to keep a full functioning laptop (it could be a net book).
So keep your MacBook pro and iPhone for now.
I am in the medical field myself. I have laptop, iMac, iPhone, iPad. The first thing to go would be iPad.
Don't get me wrong. I love my iPad. But it's a first gen device. I just happen to have a lot of disposable income to buy a new toy.
But assuming you are a student on a limited budget, keep the laptop and the iPhone for now. Now if you have extra money to pamper yourself than go ahead and buy the iPad. But don't buy one thinking it will enhance your clinical experience.
If you are in the hospital you don't want to be bringing in that can be easily stolen like an iPad. There are lots of thefts in hospitals unfortunately. You leave that iPad down and get busy or distracted it could be gone. I have had PDAs laptops stolen from locked call rooms before. Not worth it.
There's computer access everywhere in the hospital plus you have your iPhone so don't risk bringing in an iPad.
There are very few medical optimized apps for iPad since it's new.