Brief Answer:
Here is info you need.

Detailed Answer:
Hello,

Thanks for writing to Health Care Magic, I am Dr Muhammd Ahmad, I have closely read your question and I understand your concerns, I will hereby guide you regarding your health related problem.

GFR does decrease with age but you GFR is quite lesser than what should have been at your age, that is probably there is no other kidney to helo the lone kidney you have.

This condition is called chronic kidney disease, you can read about chronic kidney disease also called chronic renal failure from any reliable sourse out there on the web. There are few important considerations.

1) You have to see how badly it is affected. You have to consider the urea and creatinine levels.
2) Kidney controles serum electrolyte levels and also maintains hemoglobin levels so these levels should also be checked.
3) You need to get an ultrasound KUB to see how much affected your kidney is.
4) You also have to avoid medicines which affect your kidney.
5) Your blood pressure is really fine and you arent diabetic so these two factors wont count here.

In short I would suggest you to get an appointment with a nephrologist and start with medicine and supplements if he thinks you need any, just take care of your life style and don't use anything which might harm the kidneys , everything should stay nice and fine.

Having no albumen in urine is good sign losing albumen is bad sign. You need to undergo a complete checkup and detailed work up to see why you have bilirubin in urine and bowel movements.
Work up will also let your doctor know how severe is the kidney issue and what needs to be done.

At home reduce your salt intake, don't take too much protein and fat , eat simple food.
Every thing should stay fine if kept undercontrol.



I hope this answered your question, if you have more feel free to ask,otherwise close the discussion and rate it.

Regards.

Dr.Muhammad Ahmad.
General and Family Physician..

---

Brief Answer:
Pain killers,some antibiotics and anti arthritis drugs are caution bearing

Detailed Answer:
Thanks for writing back Just do one thing never use any med without doctor's prescription or knowledge, specially antibiotics pain killers affect kidney, then if kidney is effected you have to adjust the dose like if a normal.person is taking 400 mg of a drug , they one with kidney problem with take half of the dose as kidney is not excreting it.

So in short avoid too many pain killers and random meds, always consult your doctor about ANY med.

At you age it should be atleast more than 80-90..

You are at almost half ..understandably due to one kidney..!!! Your doctor on appointment will guide you further regarding expected GFR as he will be doing the checkup and looking into different other aspacts..

Waiting for your input.

Regards.

Dr.Ahmad

---