Uterus caffeine effects

Caffeine s primary action is stimulation of CNS activity but, as we saw, caffeine is distributed freely throughout the body. Such distribution is evidenced by caffeine s actions outside the CNS contraction of striated muscle, including the heart relaxation of smooth muscle, especially the coronary arteries, uterus, and bronchi diuretic effects on the kidneys at higher doses, a stimulating effect on respiration elevation of basal metabolism and various endocrine and enzymatic effects (Levenson Bick, 1977 Rail, 1990a). Caffeine s effects on the body s systems provide good evidence for the blockade of adenosine receptors as its mechanism of action because caffeine s effects essentially arc opposite to those of adenosine (Leonard et al., 1987). 

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