Sertraline

I have been prescribed adrenaline but developed diarrhoea and feeling agitated so have started taking half tablet instead of a whole one and see if I get used to it is this a good idea no diarrhoea but feeling agitated and tired has anyone else taken this medication and how did they get on. I also take Madopar 2 every 3 hours.

I am writing again as just noticed my laptop has changed Sertraline to adrenaline its so annoying when it does this !!