With my first son, they wrongly gave me morphine very late in the day. Basically, I was induced and they were telling me I had about seven hours to go and the pain was really intense and I had a strong urge to push. The midwife just kind of ignored me and gave me a morphine jag without checking me first. Of course, then little DS1 was born very quickly after and he was purple. He was breathing and stuff but it was scary. The morphine did bugger all of course, because the pain stopped anyway when he was born but it was very upsetting and he was a bit out of it for the first little bit. The same thing also happened to my friend who was given morphine and baby was blue. I'd avoid the pethadine if you can as I think it is similar. The gas and air is amazing! It makes you feel really kind of spacy and just takes the edge of the pain but I was walking about all loopy while my DP kept asking if I was ok cos I looked so out of it. I remember turning to him and going, 'oh my god, this is amazing'. LOL!