Brief Answer:
Diarrhea is due to Ampicillin .

Detailed Answer:
Hello
Thanks for query .Based on the facts that you posted that you have been taking multiple antibiotics for UTI since 2 years and recently got diarrhea after taking Ampicillin .

Diarrhea that you have is known side effect of Ampicillin .

I would suggest you to get urine culture done and take appropriate antibiotic as per culture report .

As regards your problem of persistent UTI I would like to make few comments about the cause and treatment of your UTI in detail though you have not asked for in your query .

The repeated episodes of UTI that you are getting is mostly due what is termed as Senile Urethral Stenosis .

In females as the age advances there is generalized atrophy of Genito Urinary organs which also involves urethra leading to narrowing of urethral passage (Urethral Stenosis),This stenosed urethra causes incomplete emptying of bladder while passing urine leading to adequate quantity of urine to remain in bladder what is called as Post Void Residual Urine (PVR) this residual urine is the source of getting repeated episodes of Urine ,

You need to consult qualified Urologist and get following basic tests done to establish diagnosis .
1) Urine routine and urine culture
2) Ultrasound Scanning of abdomen with specific evaluation of Post Residual Urine volume .
3) Endoscopic examination of bladder

He may do urethral calibration(Urethral Dilatation ) at the same sitting .
This will help to widen the urethral passage and thereby effective and complete emptying of bladder with negligible residual urine which is the primary source of UTI..However you will need to learn to do Clean self Intermittent Catheterization (CSIC) every day at home to empty bladder for 3-4 months .This will help to resolve the problem for forever .and you may not need to take antibiotics . .

I routinely follow this regime in my elderly female patients who come to me in my practice for last 45 years and getting encouraging results .

You can discuss this regime with your Urologist . I am sure you will be benefited with this treatments .

Hope I have answered your query .Please do write any more help I shall be happy to help you .

Thanks and Regards.
Dr.Patil.

---

Brief Answer:
Stop taking Ampicllin and take Ofloxacin with Ornidazole

Detailed Answer:
Hello

Thanks for follow up Stop taking Amicillin ,Instead you can take combination of Ofloxacin and Ornidazole twice daily for 5 days as Flagyl has side effect of nausea and stomach upset ..

For UTI take appropriate antibiotic as per culture report .

Thanks and Regards.
Dr.Patil.

---