Got my medication.

Picked my medication up on way for the bus, but didn't open the bag until I got home as there were too many people about.
Had a look see what tablets I'm on and I have to take 1 500mg Metformin twice a day and this other tablet, that my mum also takes, which begins with an S, but I can't remember how to spell the name. My fiance thinks that they are to help me to sleep and I said that I'd have more of a chance of 2 of my strong painkillers knocking me out than the 20mg tablets as my painkillers are 30/500 co-codamol and 2 of them definitely knock me out.