New tablet

I have been given 15mg of this mirt tablet and i took it last week for one night and i felt horrendous..so have stopped taking it so i have decided to half the tablet for now..i dont struggle with sleeping i sleep too much!!! I have severe depression and tried ciplatram prozac and sertraline and none of them worked..i really need some advise?

I felt bad for a few days, but it all settled. I get a great nights sleep with 15mgs. I tried halving the tablet & took 7.5 for 3 weeks, couldn't keep my eyes open? I found out the lower the dose, the more sedative, so I went back to 15mgs, suits me, keeps my anxiety away 👍