tuberculosis, prophylaxis
"I'm still here, so I guess it worked - but it was a rough, horribly rough 9 months - it helped that I was already on medical leave (and that the hospital took responsibility for the exposure) - Isoniazid is literally a sort of (failed) anti-depressant that works against TB, but is also pretty harsh on the liver, so I had to take Vitamin B6 for 9 months too. I was pretty moody, crazy, aggressive - not my normal self... it was a long 9 months. 

I can't understate how mood altering this medicine was - not in a good way. I was embarrassed to talk about it, which made my behavior all the more odd to my friends and co-workers, but once I explained it, I got some support - anyhow, I wish I had done that from the start. 

On the plus side, I'm still here!"