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Drug design and testing,
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Drug Names Chemical name- describes its molecular structure and distinguishes it from other drugs
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Generic name- is determined by the pharmaceutical company along with the a special organization known as the U.S. Adopted names Council
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Trade names or brand name- the manufacturer selects alone…can become a registered trademark. They are they only one who can advertise and market the drug under that name.
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The particular spelling of a brand name drug is proposed by a manufacture for one of several reasons.
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To indicate the disease process being treated
Azmacort- treats asthma Rythmol- treats cardiac arrhythmias
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To simplify the generic name
Pseudoephedrine to Sudefed Haloperidol to Haldol Ciprofloxacin to Cipro
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To indicate the duration
Slow-K slow release potassium supplement
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Drug Design New drugs are discovered in one of two ways
Totally new chemical substance Derived from molecular manipulation of a current drug
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Drug Design Until recently,designing a new drug by changing the molecular structure of an existing drug was a very slow process of trial and error
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Recombinant DNA technology Gene splicing or genetic engineering
Aided by computer design and use of enzymes, researchers are able to remove DNA chemically from one organism and transplant into other
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Testing In vitro- in glass In vivo- in living many guidelines set by FDA
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Animal Phase Precedes human testing watching for toxic effects,side effects, addictions, cancerous tumors or fetal deformities
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Animal Phase Calculating the Therapeutic Index (TI)…. The difference between the dosage that produces a Therapeutic Effect and the dosage that produces a Toxic Effect
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Animal Phase NOT always a reliable indicator of how well a drug will perform in humans.
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Human Testing 3 phases 1st phase- Healthy volunteers used to study a safe dose range, evaluate side effects and establish a correct dosage. Absorption
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Phase II Drug is given on an experimental basis to patients with the disease it will eventually be used to treat- done to determine the extent of it’s therapeutic effect
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Phase III Drug is administered to several hundreds of ill patients in exactly the way in which it will be used clinically (dosage & route) compared to other current drugs
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Phase III Human Group A all patients disorder and receive new drug being studied results compared to next two groups for side effects and ability to treat disorder
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Phase III Human Group B all patients have disorder meant to be treated by new drug all patients receive a placebo and results are compared to other 2 groups
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Phase III Human Group C all patients have disorder meant to be treated by new drug patients will be treated by another drug currently being used to treat disorder
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FDA Approval After reviewing all documentation on the safety and effectiveness of the new drug May be protected by a patent for up to 17 years
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