Expulsion and age?

I've noticed that in past years, 2 qts. of tap water would expel in a very short time. Now, an SSE takes considerable force to expel it all. I even tried using 4 dissolved Dulcolax tabs injected, followed by an immediate 2 qts. of warm water to push it up high. That used to give violent results in 5 minutes. Now, it takes a couple hours to expel entirely, everything.

Anyone else noticed lack of effectiveness increasing with age? I'll be turning 70 next month. I also have 20% of my colon removed from cancer.

Any input from physicians/ nurses, would be appreciated especially. Thanks.

People can build a tolerance to bisacodyl, so it may be that more than age.

It is also possible you are having decreased motility of your colon, gulp, due to age.

Yep everything slows down with age