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But she had a positive experience with a combination of paracetamol and the opioid pain-relief medicine pethidine.

She eventually became addicted to opioids such as morphine, tramadol and pethidine, and joined the underground party scene at Lido Beach, where she was introduced to sex work.

"The lack of communication was unbelievable. No-one had mentioned this to me during my pregnancy. During my induction, I asked if it was true and the midwife said 'yes but you can have pethidine instead or an epidural', but that wasn't what I wanted," she says.

Kirsty had previously used pethidine in labour and had a bad reaction.

These include morphine, tramadol, pethidine and codeine.