Kerr Drugs is basically an Eckerds/ CVS/ Walgreens. They sell fans, and are not open on Sundays. This is approximately all you need to know about Kerr Drugs.
While not directly on 9th street, Kerr Drug is within limits for 4th year privileges. You can also buy Snapple for a bit cheaper.
Note in TermI 2005 Kerr Drug was operating a conspiracy. When you went to 9th street on RAG night it was never open. In the immortal words of Steve's RAG,"Kerr Drug open from never o'clock to your mom o'clock daily."