text: Ergot alkaloids were also effective in inhibiting << VIP >>-stimulated cyclic AMP production, with EC50 values for ergovaline, [[ ergonovine ]], alpha-ergocryptine, ergotamine, and dopamine of 8 +/- 2, 47 +/- 2, 28 +/- 2, 2 +/- 1, and 8 +/- 1 nM, respectively.