Induce labor at 39 weeks?

Im being induced with pitocin on sunday. I am 1 cm dilated & have braxton hicks. I am trying castor oil today but dnt knw how much to take im 39 weeks and have contractions.. How much should i take for it to work? Dnt tell me of how bad it can be if u have never tried it & no men telling me how bad it is. You have never been pregnant! no coommentts men!!.women Just tell me how much to take? IF you have taken it'? or if u knw someone who did? and it actually worked?