Roberta:
It's much easier to provide a list of drugs that may not be okay. There are hundreds, if not thousands of different antibiotics. The problem is that one person might have a problem with a certain antibiotic and another person may not have a problem.
I have had counts drop twice from Amoxicillin while others here have done fine or had counts go up. It could have been a coincidence; I will never know for sure.
You never know how anyone will react to a medication. I think I've said this before, but almost every medication lists thrombocytopenia as a side effect, even the drugs used to treat ITP. The side effects that I get from meds these days keep getting worse as time goes on. To tell you the truth, I don't even fear ITP; I fear Steven-Johnson Syndrome, TTP, Guillain Barre, etc. which are potentially fatal or debilitating.
There is no list of antibiotics that are "okay", but there is a comprehensive list of drugs that are known to possibly cause thrombocytopenia. Just because it can does not mean that it will, and if it's not on the list, that does not mean that it won't affect you. Good luck!
www.ouhsc.edu/platelets/InternetPostingLitGroup2_18_11.htm