Description cilostazol is a medication used in the alleviation of the symptom of intermittent claudication in individuals with peripheral vascular disease. it is manufactured by otsuka pharmaceutical co. under the trade name pletal. although drugs similar to cilostazol have increased the risk of death in patients with congestive heart failure, studies of significant size have not addressed people without the diseasemechanism of action cilostazol and several of its metabolites are cyclic amp (camp) phosphodiesterase iii inhibitors (pde iii inhibitors), inhibiting phosphodiesterase activity and suppressing camp degradation with a resultant increase in camp in platelets and blood vessels, leading to inhibition of platelet aggregation and vasodilation.