“The reversal effect of blocking action of (+)-tubocurarine on indirectly-induced twitch by alpha-adrenergic agents was higher with noradrenaline (EC50 = 6.51 +/- 0.18 microM) compared with adrenaline (EC50 = 11.80 +/- 1.06 microM) or phenylephrine (EC50 = 17.36 +/- 1.02 microM).”