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Nucleoside Reverse Transcriptase Inhibitors (NRTIs)
Nucleoside Reverse Transcriptase Inhibitors (NRTIs)

...  Absorbed in the gastrointestinal tract  Then pass through the portal venous system to the liver where they are exposed to first pass effect, which may limit systemic circulation  Once in the systemic circulation, drugs interact with receptors in target tissues ...
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... Inspite of the transdermal system being highly successful in niche market, in other therapeutic application areas, the growth of this segment has not been highly commendable. There is a huge potential which is attracting the various companies in the pharmaceutical and biotechnology space. There are ...
SPHERIX INC (Form: 8-K, Received: 09/07/2012 11
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... opportunities for: Orphan drugs: Developed specifically to treat a rare medical condition 7 years of data exclusivity in addition to patent life in US In the US and EU, may be easier to gain marketing approval For indications such as familial hypertriglyceridemia, Hunner’s ulcers and other PBS sub-p ...
FORMULATION AND EVALUATION OF SUSTAINED RELEASE MULTIPLE EMULSION OF HYDROXYPROGESTERONE Research Article
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... Experts recommend developing a standard urine testing procedure that is part of the treatment agreement and evaluating all patients, before initial treatment and then on an "as requested" basis. The UDT is one objective patient management tool, but it alone cannot be used to diagnose a drug use prob ...
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Drug discovery



In the fields of medicine, biotechnology and pharmacology, drug discovery is the process by which new candidate medications are discovered. Historically, drugs were discovered through identifying the active ingredient from traditional remedies or by serendipitous discovery. Later chemical libraries of synthetic small molecules, natural products or extracts were screened in intact cells or whole organisms to identify substances that have a desirable therapeutic effect in a process known as classical pharmacology. Since sequencing of the human genome which allowed rapid cloning and synthesis of large quantities of purified proteins, it has become common practice to use high throughput screening of large compounds libraries against isolated biological targets which are hypothesized to be disease modifying in a process known as reverse pharmacology. Hits from these screens are then tested in cells and then in animals for efficacy.Modern drug discovery involves the identification of screening hits, medicinal chemistry and optimization of those hits to increase the affinity, selectivity (to reduce the potential of side effects), efficacy/potency, metabolic stability (to increase the half-life), and oral bioavailability. Once a compound that fulfills all of these requirements has been identified, it will begin the process of drug development prior to clinical trials. One or more of these steps may, but not necessarily, involve computer-aided drug design. Modern drug discovery is thus usually a capital-intensive process that involves large investments by pharmaceutical industry corporations as well as national governments (who provide grants and loan guarantees). Despite advances in technology and understanding of biological systems, drug discovery is still a lengthy, ""expensive, difficult, and inefficient process"" with low rate of new therapeutic discovery. In 2010, the research and development cost of each new molecular entity (NME) was approximately US$1.8 billion. Drug discovery is done by pharmaceutical companies, with research assistance from universities. The ""final product"" of drug discovery is a patent on the potential drug. The drug requires very expensive Phase I, II and III clinical trials, and most of them fail. Small companies have a critical role, often then selling the rights to larger companies that have the resources to run the clinical trials.Discovering drugs that may be a commercial success, or a public health success, involves a complex interaction between investors, industry, academia, patent laws, regulatory exclusivity, marketing and the need to balance secrecy with communication. Meanwhile, for disorders whose rarity means that no large commercial success or public health effect can be expected, the orphan drug funding process ensures that people who experience those disorders can have some hope of pharmacotherapeutic advances.
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