I had the pethidene during labour and it made me throw up (may just have been labour itself but happened after pethidene.) It also made me so tired that between contractions I kept trying to climb up on the bed for a sleep. I'd just get up and have to come back down for another contraction. Found the hot shower worked really well.
When they stitched me up for tears (I had bad ones, unknown amount of stitches, thought they would have to operate.) I had the gas and it was great I could feel them tugging and a little pain, ( no more then brushing a big knot out of your hair.) It did affect my sense of touch while taking it, someone rubbed my leg and it felt bumpy, and I thought they were playing pinball music instead of the radio until I really concentrated on it, but other than that it was all good and I'm going to try just the gas through this labour.
The Pethidene made Tristan sleepier than a bub without it but it didn't affect him otherwise.
Well there you go my insight into theworld of labour drugs.

labour duration 5hours.