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Frothy urine in the morning

Hi,

I am recovering from a bad bout of bronchitis. Not sure if it was strep but I was on antibiotics from day 1 and it still took me more than 2 weeks to recover. Towards the later part of the 2nd week my doctor did a culture test and no evil bacteria or fungus came up and by then my infection was clear.

Around the same time I first started noticing that my urine was quite frothy but only in the morning. Doctor did a random Urine test - 1 sample in the afternoon, this showed no protein. Blood urea and Blood Creatinine were smack in the middle of the normal range. Kidney ultrasound showed proper kidney size.

One week later I still see frothy urine every morning. I intend to get a 24 hour albumin and creatinine filtration check and also a BUN and plasma urea, creatinine test done. Having a relative with CKD has made me very sensitive towards possible kidney problems :(.

My question is :
1) Is it normal to have frothy urine for sometime immediately post 2 week antibiotic session ? ( Doc rules out PSGN).
2) If all the kidney tests still turn out fine, what should I check to isolate the cause for the frothy urine ?
3) Your general opinion please.
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Avatar universal
My nephrologist ordered a random routine Urine test and a 24 hour urine protein test. Both the tests came back normal. The urine routine also tested for nitrates and bilirubin and they are absent too. The urine specfic gravity and pH are normal too. This test however does not check Calcium levels.

The 24 hour test says that over a 24 hour period my kidneys let out 25.5 mg of protein in 1.5 litres of urine. I was measured my fluid intake on the day of test to be 1.0 litre.  Also since I am not presenting with any oedema and my BP is normal the doc thinks no further tests are needed.
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Avatar universal
MEDICAL PROFESSIONAL
Hi,

Frothy urine seems to be associated with increased protein levels in the urine ( as in nephrotic syndrome).Some have associated this with calcium levels and gallblader disease.As for the first question, at this point we can not definitely tell that the antibiotics made your urine frothy. However drugs are metabolized by the liver and kidney and are excreted in the urine. Each drug varies in the rate it is metabolized and excreted in the body and each person differs in terms of his body's interaction with the drug.

If nephrotic syndrome is a primary differential, the presence of high levels of protein after a 24 Hour urine sample, serum albumin levels below normal and increased serum cholesterol levels will help define the diagnosis.If the kidney tests come out to be normal, your physician may opt to request other tests for as long as they are indicated.

Urine may also interact with chemicals in the toilet bowl .You may wash a container and rinse it well to remove remaining soap residues then try to use the container when urinating.See if the urine remains frothy.
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