it acts a constrictor decreasing the diamater of an artery and increasing blood pressure
alcohol is a vasodilator at lower doses but at higher doses it acts as a vasocontrictor. (1) caffeine is a vasoconstrictor. hence the help you receive from drinking coffee with aspirin after getting a headache related to drinking alcohol. (1) - http://www.scientificamerican.com/article.cfm?id=what-are-the-effects-of-a As a general guideline, most stimulants will act as vasoconstrictors and most depressants will act as vasodilators. There are obvious exceptions to this rule (such as NO2)
Caffeine is a vasoconstrictor that can potentially counteract the vasodilatory effects of nitric oxide. This may lead to decreased blood flow, potentially negating the benefits of nitric oxide. Therefore, it is generally recommended to avoid combining large amounts of caffeine with nitric oxide supplements.
Indeed.
Epinephrine is mainly a vasoconstrictor. It acts on alpha-adrenergic receptors in blood vessels, causing constriction and increasing blood pressure. However, it can also dilate blood vessels in certain tissues, like skeletal muscle, through its actions on beta-adrenergic receptors.
Caffeine is a vasoconstrictor, so it will actually help shrink your hemorrhoids. This can be a great way to help cure your hemorrhoid problem, but it could make it worse if you aren't aware of the side-effects. Caffeine can also cause small dry stools, which could likely make the problem worse. However, you can resolve this by drinking lots of water and eating lots of fiber. Stool softeners can also help a lot.
it is a broncho dilator ^^
common bile duct
Yes, the Maloney dilator is typically used under sterile conditions to minimize the risk of infection during procedures involving the dilation of tubular structures in the body. Proper sterilization and handling of the dilator are important to maintain patient safety.
vasoconstrictor
Serotonin
A dilator is something that expands the diameter of a tube. A dilator may be medical, as with medications that dilate the pupils or the tubes of the lungs. A dilator may also be a medical device, as with the instrument used in D&C.
Serotonin