Drug Name Elavil

Hydroxocobalamin is an alternative, very effective antidote because its central cobalt atom binds CN- with high affinity to generate cyanocobalamin. Tolonium chloride (Toluidin Blue). Brown-colored methemoglobin, containing tri- instead of divalent iron, is incapable of carrying O2.
Therapeutically used Ca2+ antagonists can be divided into three groups according to their effects on heart and vasculature. I.Dihydropyridine derivatives. The dihydropyridines, e.g., nifedipine, are uncharged hydrophobic substances. They induce a relaxation of vascular smooth muscle in arterial beds. An effect on cardiac function is practically absent at therapeutic dosage.

 

The eicosanoids, prostaglandins, thromboxane, prostacyclin, and leukotrienes, are formed in the organism from arachidonic acid, a C20 fatty acid with four double bonds (eicosatetraenoic acid). Arachidonic acid is a regular constituent of cell membrane phospholipids; it is released by phospholipase A2 and forms the substrate of cyclooxygenases and lipoxygenases.
When biotransformation is rapid, oral administration of the drug is impossible (e. g. , glyceryl trinitate).