“ Felodipine (10-15-10-9 M) had a concentration-dependent inhibitory action on contraction induced by maximal potassium (125 m M) and noradrenaline (10-5 M) stimulation.”
“ Potassium and noradrenaline concentration-response characteristics were insurmountably antagonized by felodipine , the potassium sensitivity of vessels being unaffected while noradrenaline sensitivity was decreased.”