Drug Name Amitriptyline

Both mechanisms converge via factor X into a common final pathway. The clotting factors are protein molecules. “Activation” mostly means proteolysis (cleavage of protein fragments) and, with the exception of fibrin, conversion into protein-hydrolyzing enzymes (proteases). Some activated factors require the presence of phospholipids (PL) and Ca2+ for their proteolytic activity.
Diphenolmethane derivatives were developed from phenolphthalein, an accidentally discovered laxative, use of which had been noted to result in rare but severe allergic reactions. Bisacodyl and sodium picosulfate are converted by gut bacteria into the active colonirritant principle.

 

These drugs inhibit impulse propagation through the AV node, so that fewer impulses reach the ventricles. II. Nonspecific drug actions on impulse generation and propagation. Impulses originating at loci outside the sinus node are seen in supraventricular or ventricular extrasystoles, tachycardia, atrial or ventricular flutter, and fibrillation.
The former activates adenyl cyclase via a G-protein-coupled receptor; the latter inhibits a phosphodiesterase that breaks down cAMP. The integrin (GPIIB/IIIA)-antagonists prevent cross-linking of platelets. Their action is independent of the aggregation- inducing stimulus.