Drug Name Allopurinol

In the respiratory tract, cilia-bearing epithelial cells are also joined on the luminal side by zonulae occludentes, so that the bronchial space and the interstitium are separated by a continuous phospholipid barrier. With sublingual or buccal application, a drug encounters the non-keratinized, multilayered squamous epithelium of the oral mucosa.
Pathophysiology. One of the main pathogenetic factors is an allergic inflammation of the bronchial mucosa. For instance, leukotrienes that are formed during an IgE-mediated immune response exert a chemotactic effect on inflammatory cells. As the inflammation develops, bronchi become hypersensitive to spasmogenic stimuli.

 

Drug dissolution and absorption as well as onset of clinical effect and drug bioavailability may be significantly greater than those observed from conventional dosage forms6-8. Although chewable tablets have been on the market for some time, they are not the same as the new ODTs. Patients for whom chewing is difficult or painful can use these new tablets easily.
In contrast to solutions, which permit direct absorption of drug (A, track 3), the use of solid dosage forms initially requires tablets to break up and capsules to open (disintegration) before the drug can be dissolved (dissolution) and pass through the gastrointestinal mucosal lining (absorption).