Hey dude,
You might be ok, but I would tread carefully. This is an experience report of my first ever ayahausca experience, out in Peru.
I was on a course of the antimalarial antibiotic doxycycline. The experience was extremely rough on my system, extreme dizziness, vomiting for at least 6 hours, more or less nonstop, major diarrhoea, (sometimes both at the same time), the works. Took me 2 days to get back on to solid food, my poor old stomach didn't know what the hell had hit it.
You might be ok though, it might just be the doxcycline. It made me swear off antibiotics for good though, unless its a matter of urgency.
http://www.erowid.org/experiences/exp.php?ID=77118