I just applied to Pharmacology PhD programs this cycle, and I have got in to all my top choices. Here are my 2 cents...and I echo Eigen on the this.
Since you cannot change your undergrad GPA, work hard to score higher on your GRE. But remember that there will be programs that care more about research experience than your stats (hint: Vanderbilt), so you need to HIGHLIGHT your research experience in your statement. It's just that many programs have low cut-offs for GPA and GRE because there is no way they can accept an outlier to lower their mean stats for admission unless the student has a stellar research experience.