Don't believe everything you read on the UCSF Pharmacy webpage about tutoring services. Only if you are in danger of flunking a class will they match you up with a tutor. For the P1's, I think the hardest subject to grasp is P-chem and there were some people who got tutors after the first midterm. Yeah, so if you got a 85% on the first midterm and want that A by getting a tutor, OSACA will pat you on the back and tell you how well you are doing thus far before they push you outside (kidding, OSACA is very cool to us). There are formal review sessions scheduled for specific classes, but I personally think that they are a waste of time, especially if it's a question and answer session. Sometimes, you will have an awesome TA who will hold review sessions before an exam to tell us what the important points we should have learned .
Your classmates can also become indispensible because we often study together and quiz each other on the materials we are learning. Some classmates e-mail cheat sheets (allowed by the prof's) and notes. I think the 2nd years even have people who scans old exams and post it on their class website as pdf files.
Although my class is very serious when it comes to their academic life, we help each other as much as possible. Yeah, competition is not so big here since most of the courses are graded on a straight scale. Besides, we're in professional school and for many of us this is our last chance to be in this kind of setting, so we might as well learn as much as possible before we find ourselves in the real world, earning a wage.