caffeine and urination

They say that drinking coffee and tea can cause increased urine production, is there a way to actually measure this?

Like say you drank 2 litres of tea would you void exactly 2 litres or more at some point? Would you total urine output for the day be increased?

So you would be voiding less?
Why do they say then that caffeine can cause increased urine production? I thought because it lowers the level of ADH produced?

It's odd as I'm only having bouts of this slight frequent urination, so it's not regular. So, in the other words I'll have days where I'm fine, normal urine frequency and then suddenly one day my urine output will increase despite not having changed my fluid intake. Again it's still quite mild, only once did I pee over 3 litres in a day but when I've been during this time, the urine then is a clear, pale yellow colour but when I'm fine it's more yellowish. I've checked my blood sugar yesterday during one of these bouts and it's normal, so, not sure what this could be.

I am on Remeron (Mirtazapine) and have been on it for more than 2 months now so I'm not sure if that is having an effect here although that would be strange given that I didn't have any side effects when I first took it.

Thanks for the replies. I have been to the doctor now like three times and each time my urine sample comes back negative so there's nothing more to be done as he says my symptoms are too mild and vague.

So what looking back is figured out what this is... I'm having bouts of frequent urination not frequent urination itself as it only happens on some days then not on others. So I'll have three or more days maybe where I'm totally fine, normal urination etc. then suddenly I'll have this bout where I'll go a few times in succession. During this time my pee is clear, almost white colour but what's bothering me is where this extra urine is coming from. I haven't changed my diet or fluid intake. For example last few days I've been totally fine, even slept fine without going but then last night I had a large cup of non caffeine tea, emptied my bladder maybe 40 mins later but then couldn't get to sleep because I was having that sensation like I needed to go again and did go and voided like a fairly decent amount with that clear almost white colour. Where did this come from if I had just voided a short while ago? Still no pain or burning or anything severe before or after peeing.

Then the next day I'm fine again.

The doctor has no idea about this. It's not high blood sugar as I checked my bs during one of these bouts and it was normal. It's not the mirtazapine / remeron as this is not a known side effect. And like I said no infection or uti as urinalysis is always negative. Doctor didn't mention prostate issues, firstly due to my age and secondly because I'm not having any prostate symptoms.

It may seem obsessive but then it is just worrying because I've never had this before and occasionally affecting my sleep now too. So have no idea what to do apart from requesting an urologist appointment. God knows how long that will take.

Thanks Steve. Yeah I see what you mean but let me ask you have you always been like this? In other words have you found yourself peeing more on some days then less on others? If it's normal for you and this didn't come on suddenly then that's ok but in my case it seems like this has come up kinda of suddenly. Again though it's not severe. On the days I do have the urination frequency, I might pee twice in say 2 hours and then might get the urge again some time later. My normal urination frequency from what I can remember is only about 2-3 times a day!

So what is your explanation as to why you pee differently when you drink beer? As you mentioned factors of weather, hydration etc but it just seems strange when one day you can hold in a certain amount with no issues then another you will struggle to hold that same quantity.

coffee - me - if I drink it at night I get up about 3 additional times

Hi Ido,

Thanks for your response.

Tiger sounds like you have something similar. For example yesterday I drank plenty, maybe well over 3-4l but had no urge to go for most of the day apart from in the morning. In total I went maybe around 3/4 times which is normal for me. Today however, I've already been twice within 2 hours and voided around 1 litre despite the fact that I've only drunk about 500ml before my first void. So this makes no sense to me and is what slightly concerns me. Again though no pain, burning or straining etc.

I found that coffee, decaf or regular, made me pee with great frequency and caused serious bladder spasms. I had to give it up. I found that tea, however, causes no problems, so I have switched entirely to tea.