Could someone who has experience with both Dulcolax tablets and castor oil comment on the compared effectiveness and the feelings 15mg Dulcolax produce VS about 30-60ml of castor oil (as I've read more than about 30ml cannot be converted into the active component during one session anyway, but that's not important here).
The main thing I'm interested in is if you perceive the effectiveness of one of the two to be significantly higher in each volume, urgency/irresistability and/or duration.