To study the relation between Yang Vacuity disease happening, development and cyclic nucleotide response, and prove curative effects of some assisting Yang drug, the plasma cAMP, cGMP and cAMP/cGMP levels were detected by radioimmunoassay in the Yang Vacuity group and curing group. Results showde: (1)Yang Vacuity group: the symptoms were clear, death rate was high, the plasma cAMP and cAMP/cGMP increased obviously, it suggests that cyclic nucleotide was imbalance.(2)Curing group: the symptoms of Yang Vacuit...