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The local suppositories of steroid
and anti-inflammatory drugs can cause local ulceration if used in excess or due to wrong insertion.
The bacterial growth
indicates local infection and so it should be treated with the antibiotics, Zosyn
is a good choice but should never be taken under self prescription.
If you can observe safety precautions and carry out treatment in a close supervision of a local physician the prognosis would be satisfactory.
I hope the advise would be informative and useful for you.