bacterial infection
"I took Ciprofloxacin to treat a gut infection caused by Aeromones that showed up on a stool test. I was first prescribed Bactrim, which caused intense tachycardia, dizziness, nausea, and dysphoria. 

Cipro DID cause waves of dizziness and nausea, which meant I couldn't drive right after taking it. It would have been a problem if I had been working. But in the end, the side effects were mostly tolerable knowing that the infection had to be dealt with.

After I finished my 10 day course, I had some weakness and exercise intolerance. My doctor prescribed supplements to rebuild my mitochondria."