Hi, if you are looking for a more natural means of immediate relief, I would suggest that you consider the old fashioned, time-tested cleansing enema. An enema is the safest, most natural and most effective method of constipation relief.
The only cost is that of purchasing an enema bag, usually less than $15 USD, and it will last for years. A big advantage of an enema is that you get to time the enema to your convenience, as compared to a laxative that often works at the worst possible time.