Although
enzyme replacement therapy is safe and effective in ameliorating the signs and symptoms of
Gaucher's disease, some patients have withdrawn from treatment. The purpose of this study was to evaluate the response to withdrawal and to discuss the implications for patients currently on unaltered
therapy regimens since the advent of treatment. Fifteen patients, who had been treated with
enzyme replacement for 5-56 months and then withdrew for 8-47 months, were assessed for changes in haematological parameters and in liver and spleen index volume. Despite non-uniformity of duration of on and off periods, degree of organomegaly, anaemia and
thrombocytopenia, most patients did not revert to respective baseline values in most parameters after withdrawal. None of the patients suffered exacerbation of bone involvement or had new or aggravated
pulmonary hypertension. Adult patients with stable
Gaucher's disease may be withdrawn from
therapy for circumscribed periods without forfeiting most gains accrued during
enzyme therapy. Therefore, stopping and restarting may be considered in some patients. Alternatively, maintenance at reduced dosage and/or frequency may be appropriate in some adult patients who are stable or non-responsive after the first years of
enzyme therapy. This caveat does not apply to children.