Brief Answer:
It can take days to weeks

Detailed Answer:
Hello and welcome to Ask A Doctor service.

I have reviewed your query and here is my advice.

Sour taste usually clears up in 2-3 days after stopping bactrim.

Vomiting, diarhea and flushed face can clear in 3 to 4 weeks. Precautions need to be taken like drinking cleaner water with low TDS and taking probiotics for some time. Take medicine for vomiting like ondansetron or gravol. Avoid unnecessary antibitiocs and diflucan in future.

Hope this helps. Let me know if I can assist you further.
Dr Vaishalee

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