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“However, SBL and VER significantly increased (p < 0.01) the EC50, of OT , ACh and EGM and significantly inhibited (p < 0.01) the frequency and amplitude of spontaneous uterine contractions.”
“2 Relaxin (0.2–6.3 nM), levcromakalim (25–800 nM), salbutamol (1–63 nM) and nifedipine (1–250 nM) caused concentration‐dependent inhibition of the spasm evoked by oxytocin (0.2 nM) and relaxin was the most potent relaxant.”
“ Oxytocin produced an acute decrease in this threshold dose on phentolamine or methysergide, but was inhibited by papaverine, dibutyryl cAMP, salbutamol and verapamil.”
“Graded concentrations of salbutamol , isoproterenol, papaverine, theophylline, thioglycollate, and MgCl2 produced a decrease in the maximal effect of oxytocin and a shift of the concentration-effect curves to the right.”