Red or brownish urine is not a good sign. It can mean there's blood in the urine, which may happen due to infection, stones, or more serious issues. Since you're getting repeated UTI symptoms, and now the urine is red/brown, it's important not to use old medicines without checking.
Next Steps
Get a urine test done (Urine Routine + Culture) to find the exact cause and which antibiotic is needed.
Don't take previous medicines again without checking with a doctor.
kindly consult a doctor. don't self medicate.
Health Tips
Drink 3–4 litres of water daily, avoid fried or spicy food.