The suppository types you cited are the most common commercially made laxative ones, but there are a couple more.
First, there is the old mom's stand-by of soap. A suppository piece is cut out of a bar of Ivory or Castile soap, preferably used so it's a bit softer than a new, and carved into a suppository shape, rounded and smoothed under running water, then given wet. The slippery surface self lubricates it and the person will start to feel an urge quite promptly and usually poos within an hour.
Now rare in the US but available on-line are the EVA QU and similar. They used to be sold as Ceo-O-2 or some similar name. These supposedly worked by making and releasing Carbon Dioxide gas in the recipients colon and the inflation caused an urge. I suspect their fizzing action was the real laxative mechanism.
Glycerin are the commonest and cheapest store bought suppositories. They are often sold in bottles of 100 for under $10. If you just want a bit of help getting a poo started, they usually work. If you are badly constipated a glycerin suppository, or even several of them, probably won’t do much. Don’t expect them to cause an irresistable urge. In addition to the solid suppositories, there are liquid glycerin applicators, like the Fleet Liquid Glycerin Suppositories and the Asian versions, called “figs” because of the shape of common applicators. These contain from 6ml to 50ml og liquid glycerin or 50/50 glycerin and water. They are faster acting than solid suppositories and the larger sizes cause a stronger urge. They don’t soften so if you’re constipated the passage won’t be easy.
The strongest laxative suppositories available are probably Dulcolax or the generic equals. These cause a strong urge, and sometimes a burning sensation, within about 15 to 20 minutes. The anal irritation can be minimized by getting the suppository up high into the person. This also increases their effectiveness. It’s often hard to insert the suppository high enough by hand, but Fleet sells them with an Easy Glide applicator, intended to be disposable, but washable for reuse. There is also the Magic Bullet suppository- same active ingredient but in a water soluble base. These work faster and if a small warm water enema (a few ounces) is given after suppository insertion their effectiveness is greatly enhanced because the laxative is more widely spead in the colon. The poo power of a Dulcolax suppository is also enhanced if the recipient walks around or exercises a bit after administration. Again, these suppositories don’t soften and if given to a badly constipated person can be pretty uncomfortable. These days, sadly, they have largely replaced enemas to mae patients poo in hospital.
As to habituation, an effective suppository will pretty mucj clean out a person. Since it takes a couple of days to refill their colon, the poo can dry out and harden needing another suppository to get going again. To keep things soft something like Miralax is a good option- it’ll keep poo soft even if you don’t go for several days.
Suppositories can be fun, but follow the med’s instructions.
Hopefully the site hasn’t cut off the message this time