The diuretics are generally divided into four major classes, which are distinguished by the site at which they impair sodium reabsorption [1,2]: âLoop diuretics act in the thick ascending limb of the loop of Henle.
Night blindness, also known as nyctalopia, is the inability to see clearly at night or in dim light (such as raining or dark room). Nyctalopia is not an eye disease or disorder. It is actually a symptom or indication of an underlying problem in which some may be serious.
If this proposed mechanism is valid for nyctalopia, then one must look beyond, to the other occasional but serious psychological side effects of this drug. The authors state, these data suggest a major mental consequence for the hundreds of millions of adults and children who are vitamin A deficient [4].