totally understand your trepidation.
below is my basic understanding in laymans terms and the advice i was given when on docetaxl
prednisolone is a steroid that restores some the good stuff that chemo kills when chemo is doing its job and killing the bad stuff. only downside is that it can keep you awake as its like having 10cups of coffee when you are on the big dose the day before/during chemo day.
anti sickness pills generally have no side effects. dont wait until you feel sick. take them before ie every day from chemo day to day 4. i was told to take them for 4 days, i did that and on day 5 i felt sick. doc said take for 6 days then as no down side and why feel sick if you dont need to. its like not taking paracetamol when you have an occasional headache, why wouldnt you. for the remaining cycles i took for 6 days and never felt sick again.
anti diorreah tablets i was told to take only if i had problems. i did on two seperate occasions very briefly. uusally what they give you is just like strong immodium .
i know everyone is different with chemo but i tollerated it well, used the drugs when i needed to and stilł ran 2 marathons on weeks 13 and 15 of it so please believe that you will be one of the majority who have minimal side effects.
I did have a low platelet count and ended up self injecting a drug to make my marrow produce more. terrible pain and high temp after 2 so was in a&e on antibiotics for a day in case i had an infection. i didnt, juat a bad reaction to the injections so i stopped and had less chemo next time. clearly it worked on a reduced dose as 4 years on i am still running and have a low psa of 0.06.
hope that helps mate
rooting for you