I have never taken it but I know people who have. I wouldn't unless labor is stalled or you are overdue. It can be dangerous.
I did with my daughter 6 yrs ago and had her 24 hours later. Took it the other day with my son and couldn't stop throwing up. I decided not to do it again.
I've only heard horror stories about taking it, it's the only thing I've sworn never to try and I'm on baby #5. Accupressure worked for babies #3 and 4 wish I'd heard of it before.
I personally would not take it. Speak with your healthcare provider before taking anything.
I took it last pregnancy and had baby within 12 hours after taking it. I'm considering doing it this pregnancy as well.
There was a woman on here that told her story about castor oil. It was bad... I think it may have had life threatening consequences.
Of course, there may have been underlying conditions. Whatever you decide, please be careful.
Omg I had my first baby just after my 17th birthday. My mom made me take that cuz I was having really bad back cramps and couldn't sleep for 3 days after taking taking it I was so sick. It did not make me go into labour. All it did was make sure I couldn't leave the bathroom for a good 6 hours of puking and on the toilet. Everyone is different. Best of luck.