U may face some courses which need calculation but is not that difficult since it has the formulas, and upto 3rd year akababi chemistry coursoch alu bednb ena even if u r not good now if u read enough material u can tackle. The department really needs a hard work since its clinical now, it doesn't only focus on the selling of drugs but also on patients. U may work in wards with doctors so make sure u are interested enough to get in and give it all.