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Omeprazole was a subject of a patent litigation in the U.S. [66] The invention involved application of two different coatings to a drug in pill form to ensure that the omeprazole did not disintegrate before reaching its intended site of action in stomach. Although the solution by means of two coating was obvious, the patent was found valid ...
[34] [36] They recommend that PPIs should be used at the lowest effective dose in people with a proven indication, but discourage dose escalation and continued chronic therapy in people unresponsive to initial empiric therapy. [35] With regard to iron and vitamin B 12, the data is weak and several confounding factors have been identified. [33]
Physicians legally can and often do prescribe medicines for purposes not listed in this section (so-called "off-label uses"). Contraindications - lists situations in which the medication should not be used, for example in patients with other medical conditions such as kidney problems or allergies
Omeprazole is a popular drug that conforms to Lipinski's rule of five. Some authors have criticized the rule of five for the implicit assumption that passive diffusion is the only important mechanism for the entry of drugs into cells, ignoring the role of transporters. For example, O'Hagan and co-authors wrote as follows: [5]
"Omeprazole".Drug Information Portal.U.S. National Library of Medicine. "Amoxicillin".Drug Information Portal.U.S. National Library of Medicine. "Rifabutin".
The opposite of an indication is a contraindication, [4] a reason to withhold a certain medical treatment because the risks of treatment clearly outweigh the benefits. In the United States, indications for prescription drugs are approved by the FDA. Indications are included in the Indications and Usage section of the Prescribing Information.
For example, the British National Formulary uses the cautions versus contraindications pair, and various U.S. CDC webpages use precautions versus contraindications. The logic of the latter two styles is the idea that readers must never be confused: the word contraindication in that usage always is meant in its absolute sense , providing ...
Omeprazole, for example, has a methoxy moiety (CH 3 O-) on the benzimidazole ring at position 5, whereas pantoprazole has a difluoromethoxy (CHF 2 O-) chain at position 5. Lansoprazole has a trifluoroethoxy (CF 3 -CH 2 -O-) chain on the pyridine ring at position 4, whereas rabeprazole has a methoxypropoxy (CH 3 -O-(CH 2 ) 3 -O-) chain at ...