this actually makes u more sleepy.
anything that contains sugar (glucose) is usually a good idea since thats what your brain uses as the main source of energy.
effects of caffeine can range from significant to none depending on the person.
nicotine doesnt really do anything except...
look at Dr_Fresh's flowchart.
http://community.boredofstudies.org/showthread.php?t=262279
transfer=going into another degree without finishing ur current one. what ur proposing is graduate entry into medicine which is another thing altogether.