“…Various drugs like fluroquinolones group, such as ofloxacin, ciprofloxacin, levofloxacin, trovafloxacin and moxifloxacin, antimalarials, penicillins, sulfonamides, antithyroid medications, anticonvulsants, anticancer drugs, and vancomycin are implicated to cause neutropenia, pancytopenia, bone marrow suppression, and myeloid maturation arrest. 7,8 Levamisole, another antihelminthic and immunomodulator, also suppresses bone marrow and induces neutropenia. Cyclic or periodic neutropenia may be related to congenital diseases or related to toxic exposure.…”