An adrenergic drug, C9H13NO2, that is a powerful vasoconstrictor and is used to relieve nasal congestion, dilate the pupils, and maintain blood pressure during anesthesia.
After equilibration, the ileum and duodenum segments were contracted with acetylcholine (ACh) ([10.sup.-4]-[10.sup.-7],6 M) and relaxed with phenylephrine ([10.sup.-4]-[10.sup.-7],6 M).
The present study aimed to evaluate the effect of prophylactic infusion of a combined ephedrine and phenylephrine on maternal hemodynamic before the induction of spinal anesthesia for cesarean section.
The Phase II, masked, non-randomized, cross-over study evaluated 12 subjects who underwent pupil dilation with topical phenylephrine administered by a 32-[micro sign]L eye dropper (at one of two concentrations: 2.5% or 10% formulation) in one eye and an 8-[micro sign]L micro-dosing administered electronically (10% formulation) in the other eye.
Optimal tension, selected from preliminary experiments, was that which gave the greatest response to [10.sup.-6] M phenylephrine. The rings were given 2 g (100%) of initial tension and allowed to equilibrate for 2 h.
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