Abstract:The contents of cAMP and cGMP in platelet of migraine patients were measured by radioimmunoassay(RIA).The results showed that the contents of cAMP of platelets in migraine patients had no change and the contents of cGMP were increased in migraine patients during attack-free periods as compered with mormal control level.It is sugsested that the possible role of the abnormal cyclic nucleotides contents of platelets may play a certain role in the occurance of masraine.