The doctor of pharmacy degree requires completion of four years at an accredited college of pharmacy (most students applying for admission into a college of pharmacy already have an undergraduate degree.
dig1. 1  to break up, turn over, or remove earth, sand, etc., as with a shovel, spade, bulldozer, or claw; make an excavation. 2  to make one's way or work by or as by removing or turning over material: to dig through the files. 3  to break up, turn over, or loosen (earth, sand, etc.), as with a shovel, spade, or bulldozer (often followed by up).
The dictionary meaning of the word Digress is 'to leave the main subject temporarily in speech or writing.' or simply deviate. As you say,I digress means  I am straying from the main subject right now. . Like in this sentence - 'I need to digress a bit to let the ink dry.'. Hope this helps :)