For the early phase of therapy, PZA and any of the second-line
drugs are usually administered. PZA has a good penetration in
CSF and, despite a very low early bactericidal activity in the firstdays of treatment, it is important because in the course of time it
becomes as effective as INH and RMP.59,60 Moreover, together with
RMP, it makes an essential contribution to the sterilization of
lesions and has an important role in reducing the risk of recurrence.61
PZA is recommended at the dose of 30e35 mg/kg/daily
with the highest dosage for younger children. With these regimens,
CSF concentration in excess of 20 mg/mL higher than the MIC of PZA
is reached in most children