<qa>  What is the name of the drug that may affect IPF within 6 months prior to treatment?12. Investigational or clinical therapy including tetracycline or derivatives, cyclosporin, methotrexate, chlorambucil, colchicine, d-penicillamine, pirfenidone, interferon-beta or interferon-gamma or other drugs other than corticosteroids and azathioprine or cyclophosphamide potentially affecting IPF within 6 months prior to treatment 