BPH nocturnal diuresis

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by Guest Posts on Tue Jun 02, 2020 10:35 am

BPH nocturnal diuresis

I have had BPH for many years which is treated with tamsulosin hydrocholride and Finasteride.

During daylight hours I urinate perhaps every 3-4 hours, sometimes less depending on the amount of fluid intake. However, at night I can urinate between 3-4 times between 2300 - 0600 hours. Is the supine position relevant to this condition or do I have an overactive bladder ?

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Mr Chris Harding
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by Mr Chris Harding on Wed Jun 03, 2020 9:49 am

Re: BPH nocturnal diuresis

This sounds very much like nocturnal polyuria ( a condition where 33% or more of your daily urine output occurs during nighttime hours). If you keep a bladder diary for a few days prior to your next review appointment (marking the times when you go to bed and wake) then your urologist may be able to help with this. Some patients find restricting fluid intake from early evening helps but for others additional treatment is required.
Mr Chris Harding
Consultant Urological Surgeon

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Prof Christopher Chapple
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by Prof Christopher Chapple on Tue Jun 09, 2020 11:56 am

Re: BPH nocturnal diuresis

I would agree with Mr Harding that the use of a bladder diary is appropriate. Examples can be accessed online, searching for a bladder frequency volume chart. A production of urine at night over the age of 50 of more than 1/3 of the 24-hour production constitutes nocturnal diuresis. The actual threshold value is age-dependent and below the age of 20 this maybe 15-20%. There can be multiple reasons why this occurs. If night-time frequency is a problem not resolved by fluid restriction for 3-4 hours beforehand, then review by your doctor would be appropriate, with onward specialist referral as necessary.
Prof Christopher Chapple
The Urology Foundation expert & Consultant Urological Surgeon

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