Amlodopine - night time peeing.
 

https://www.rxlist.com/norvasc-side-...rug-center.htm
Common side effects of Norvasc include:

• headache,
• swelling (edema) of the ankles or feet,
• dizziness,
• lightheadedness,
• drowsiness,
• tired feeling,
• nausea,
• abdominal or stomach pain, or
• flushing (warmth, redness, or tingly feeling).

http://labeling.pfizer.com/ShowLabel...62&section=ppi
What are the possible side effects of NORVASC?

NORVASC may cause the following side effects. Most side effects are mild or moderate:

• swelling of your legs or ankles
• tiredness, extreme sleepiness
• stomach pain, nausea
• dizziness
• flushing (hot or warm feeling in your face)
• arrhythmia (irregular heartbeat)
• heart palpitations (very fast heartbeat)
• muscle rigidity, tremor and/or abnormal muscle movement

So your swollen ankles may be caused or exacerbated by amlodopine, but there's no mention of frequent urination, despite it being a common side effect of some blood pressure medications.

I've been on 10mg/day Amlodopine since 2003 and never suffered any change to night time urination. That said, I do have very slightly swollen ankles (almost negligible) but none of the other side effects listed above. I flew the last twelve years of my professional career with it and frankly have BP readings that are so low that I would like to come off it. Sadly both my AME and GP are aligned on the 'If it ain't broke don't fix it' approach' so I don't think they'll let me.

Any change in Nocturia is more likely to be related to ageing and prostate size, along with altered personal tolerances to the bladder when asleep.

Are you on any other meds ?

It's worth having a chat with your GP if nocturia is a new (ish) symptom, irrespective of the amlodipine.

Change the time routine for taking the Amlodopine and see what happens?
You don't specify the dose. Amlodopine standardly comes in 10mg pills. Subject to medical advice, of course, you could buy a pill cutter and reduce the dose to 7.5mg for a few days to see if that made any difference.
In any event, when dealing with medication for blood pressure, the only course to follow is a medically approved one.

Take a urine sample in a jam jar to the doctor and ask him to whack a dipstick into it.
Spire hospitals typically charge £16 for a urine test.
You can buy a bottle of dipsticks yourself at the pharmacy for a fraction of that per test. No wonder the private medical insurance premiums are so extortionate.

Depending upon the advice of your cardiologist, because anyone in the medically civilised world who takes blood pressure medication undertakes the common sense of having regular ECGs under the supervision of such a qualified specialist; you could always suggest 5MG Amlodopine and 8MG Perindopril. That's two tablets of slightly different directed drug.
You will find that, were you ever unlucky enough to encounter prostate cancer, pelvic floor exercises are very useful adjuncts to quality of life. Women have a more natural aptitude for them than men but they are easy to do, can be done anywhere in almost any position and in fact, if you experiment little, they can become quite stimulating.

I think you have to accept that your "plumbing" gets weaker as you get older, another legacy besides grey hair and insomnia!

Sounds like The Doctor has covered all the bases. Obviously, if anything changes, it's worth a re-visit.

I've prescribed amlodipine, simvastatin and atorvastain, widely for patients with hypertension, and urinary frequency isn't a common symptom. There could be some mileage in adjusting the dose (they have a long half life), but obviously back this up with your prescriber,

Maybe worth considering other causes as well, my first thing would be to rule out the obvious (chlamydia and the such like).