Labor medication advice

Malina

Hi 3rd time mama over here and I have a question about labor pain medication! Has anyone ever had nitrous oxide or pethidine to help with pain? I've only had the epidural and my other was natural. I was never offered either or these things but I've heard about them and I'm thinking about trying one of them this time around and wanted to see if anyones gotten them before! Any bad side affects or anything??