Drug Name Allopurinol

When an agonist and a competitive antagonist are present simultaneously, affinity and concentration of the two rivals will determine the relative amount of each that is bound. Thus, although the antagonist is present, increasing the concentration of the agonist can restore the full effect (C).
The hormone elicits contraction of the gallbladder and discharge of bile acids via the bile duct, as well as release of lipase from the pancreas (intestinal peristalsis is also stimulated). Because of its massive effect, castor oil is hardly suitable for the treatment of ordinary constipation.

 

The potential for such dosage forms is promising because of the availability of new technologies combined with strong market acceptance and patient demand. By paying close attention to advances in technologies, pharmaceutical companies can take advantage of ODTs for product line extensions or for first-to-market products.
The change in potential is triggered by an appropriate stimulus and involves a rapid influx of Na+ into the interior of the nerve axon (A). This inward flow proceeds through a channel, a membrane pore protein, that, upon being opened (activated), permits rapid movement of Na+ down a chemical gradient ([Na+]ext ~ 150 mM, [Na+]int ~ 7 mM).