If you want to crash review chemistry, I'd make a few suggestions, many of which have been mentioned. 1. FUNCTIONAL GROUPS...get your organic/OMC text and make flash cards of the groups. While there is little actual reaction/synthetic chemistry, being able to identify functional groups is a must. 2. now that you can identify these functional groups/rings learn the pka of them. 3. Study acid base chemistry...I always found acid base chemistry to be among the easiest matierial in school, but many people seemed to have quite some difficulty. Learning which functional groups ionize when is also a must. (Can anyone say henderson-haselbach?) 4. While this may be too soon for you, learn the top 20 or so most common phase I/phase II enzymatic reactions and where they would occur in any given molecule. For example, take a drug and assume that omega oxidation followed by b-d-glucuronidation occurs...can you draw the end product?
These 4 suggestions, if you take the time on your own to learn/review these will make OMC much, much easier. My OMC professor always stated that he could guarantee any student at least a C if they studiend 1-2 hours per hour of lecture. He was an UNGODLY good teacher, and some people may nto need this much study time. Moral of the story, pharmacy school is much, much more rigorous than undergrad; there is a huge learning curve. Once you come to terms with the volume of material everything gets much easier. The 4 suggestions listed above will help you tons too.
Jason