7 Things A Continence Specialist Wishes Patients Asked Before Starting A Bladder Tablet

The bladder tablets in current use — anticholinergics like solifenacin and oxybutynin, beta-3 agonists like mirabegron — all work on signalling between the bladder and the brain. They reduce the message the bladder is sending.

If the message is at fault — a hyperactive nerve on a normally-holding bladder — that is the correct place to aim. My assessments over sixty rarely find that picture. What I find is a bladder that genuinely holds less than it used to, and a nerve reporting that accurately.

By the time a patient reaches me they have had both. Ultrasound measures bladder volumes and post-void residual. Culture excludes infection. Sometimes urodynamics has measured detrusor pressure and flow.

Every one of those tests is worth doing. Not one of them assesses the surface of the urothelium — the lining. So a patient carrying significant lining deposit collects three normal results and is told the workup is unremarkable, which is not the same sentence as 'nothing is going on'.

The single most valuable piece of information in my assessment is a three-day diary of fluid in, fluid out, timing and volume, filled in properly. Most of my patients arrive without one, because the GP visit did not include the twenty minutes it takes to explain how to keep it.

The diary usually shows what the tablet is missing. If the pattern is small, frequent voids at low volumes with strong urgency, the wall is signalling early. If the pattern is normal volumes with an urgency spike before them, the nerve is the driver. Different pictures. Different treatment answers.

Ninety percent of the patients I see have restricted their evening fluids. Most of them have restricted their daytime fluids too, on the reasonable-looking theory that less in equals less out.

The trouble is what concentrates. Reduced intake concentrates the urine that is produced. Concentrated urine is more irritating to a lining that is already sensitised, so a wall that was calling early calls earlier. The patient wakes thirsty, drinks a glass, gets up for it anyway, and adds mild dehydration on top of the original problem.

I teach pelvic floor exercises and I stand by them. For a patient whose problem is a leak on a cough, a sneeze or getting up from a chair, they are the right first-line treatment and often the whole answer.

They do not, however, change when the bladder decides to signal full. That is a separate mechanism, and most of the patients I see about night trips have an urgency problem, not a closure problem. They do the exercises properly for six weeks, see no change at night, and come back convinced they have done them wrong. They have not.

Here is the assessment finding that changes what I recommend to my referrers.

The bladder measures fullness by wall stretch. As it fills, the wall extends, and at a defined stretch a signal is sent up to the brain. The whole system depends on the wall being able to stretch.

Urine carries mineral and acid components in solution — calcium oxalate, phosphate, urate. Across fifty or sixty years a fraction of that settles out onto the lining and bonds to it as a thin, pale film. Tissue carrying that film loses its stretch. A bladder that cannot stretch reaches its signalling threshold at roughly a third of its functional capacity.

That gives you a bladder that feels genuinely full and holds very little. Which is exactly what my patients describe — the urgency is real, they arrive at the toilet, and almost nothing comes out. It is not overactive. It is coated.

No standard workup images the lining. That is not a criticism of any test. It is a description of what is missing from the picture.

Every patient I see has had some version of the age answer.

Age is a risk factor, and it is a real one. It is not, on its own, a mechanism. When a patient of sixty-eight is told this is common at her age, what she hears is that nothing can be done — which is not what was said, but it is what she takes home. She stops asking, and I meet her on the far side of a decade of stopping.

Something physical changed between fifty and sixty-eight. Age is the clock. It is not the change.