Hi Grub, I asked my midwife at my last appointment when I should start taking it after she suggested I take it to avoid using the gel for my induction, She said only for the week before I'm due to be induced.
I don't know if it would bring on labour early but maybe just wait till your DH is home to be on the safe side. My midi told me the week before was plenty of time for it to do it's job.
I'm glad you have asked this question though, I'm interested in what others have to say, maybe if I start it earlier I could beat an induction all together??