Drug approval Flashcards

1
Q

What law Prohibited mislabeling and adulteration of drugs?

A

Pure Food & Drug Act: 1906

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2
Q

What law Prohibited false or fraudulent advertising claims?

A
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3
Q

What was Harrison Narcotic Act: 1914?

A
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4
Q

What was the Food, Drug, & Cosmetic Act: 1938?

A

Required that new drugs be safe as well as pure (no proof of efficacy). Enforcement by FDA

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5
Q

What law was Vested in the FDA the power to determine which products could be sold without prescription?

A

Durham-Humphrey Act: 1952

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6
Q

What did the Kefauver-Harris Amendments (1962) to the Food, Drug, & Cosmetic Act cause?

A

Required proof of efficacy as well as safety for new drugs and for drugs released since 1938;

established guidelines for reporting of information about adverse reactions, clinical testing, and advertising of new drugs

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7
Q

What was the effect of Comprehensive Drug Abuse Prevention & Control Act: 1970?

A

Outlined strict controls for habit-forming drugs; established drug schedules and programs to prevent and treat drug addiction

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8
Q

What was the effect of Orphan Drug Amendments: 1983?

A

Provided incentives for development of drugs that treat rare diseases (<200,000 in USA)

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9
Q

What was the effect of Drug Price Competition & Patent Restoration Act: 1984?

A

Abbreviated NDAs for generic drugs (bioequivalence data).

Patent life extended to account for FDA review process ( max ≤ 5 extra years or 14 years post-NDA approval

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10
Q

What was the law that caused the effect of Manufacturers pay user fees for certain NDAs?

A
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11
Q

Where was the effect Dietary Supplement Health and Education Act: 1994?

A

Established standards for dietary supplements; prohibited full FDA review as drugs.

Required specific ingredient and nutrition information labeling that defines dietary supplements and classifies them as part of the food supply but allows unregulated advertising

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12
Q

What was the effect of Bioterrorism Act: 2002?

A

Enhanced controls on dangerous biologic agents and toxins.

Seeks to protect safety of food, water, and drug supply

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13
Q

What was the effect of Food&DrugAdministration Amendments Act: 2007?

A

Grants FDA greater authority over drug marketing, labeling, and direct-to-consumer advertising;

  • requires post-approval studies,
  • establishes active surveillance systems,
  • makes clinical trial operations
  • results more visible to the public
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14
Q

“Right” dose must balance what?

A

benefits and risks across all patients

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15
Q

Describe how a drug makes it to the market place

A
  1. year 0-2, in vitro studies, biologic products, chemical synthesis, optimization along which finds the lead compound
  2. years 2-4, animal testing determines the efficacy selectivity mechanism
  3. years 4-8, undergo drug metabolism and safety assessment with use of phase I, II and III testing
  4. Phase I => 20-100 subjects (is it safe, pharmacokinetics)
  5. Phase II => 100-200 patients (work in patients?)
  6. Phase III=> 1000-6000 patients (work, double blind?)
  7. years 8-9, NDA (new drug application)
  8. years 9-20, marketing via phase 4 with postmarketing surveillance
  9. year 20, generics become available
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16
Q

Describe the experimental system of molecular eg adreno-receptor wrt to species/tissue, delivery, measurement

A

species/tissue => cell fraction; cultures; cloned receptors

delivery => in vitro

measurement => affinity & selectivity

17
Q

Describe the experimental system of isolated tissue wrt to species/tissue, delivery, measurement

A

species or tissue => blood vessels; heart; lung; ileum

delivery=> in vitro

measurement => Contraction or relaxation; receptor selectivity; effects on other smooth muscles

18
Q

Describe the experimental system of blood pressure wrt to species/tissue, delivery, measurement

A
  1. species/tissue => dog/cat (anesthezed)
  2. delivery => parenteral
  3. measurement => systolic/diastolic changes
  4. species/tissue => hypertensive rat
  5. delivery => oral
  6. measurement => antihypertensive effects
19
Q

Describe the experimental system of cholesterol; blood sugar wrt to species/tissue, delivery, measurement

A

species/tissue => rat, dog

delivery => parenteral, oral

measurement => serum measurement

20
Q

Describe the Cumulative distribution of new drugs by discovery strategy wrt first-in class drugs and follower drugs

A

First-in-class drugs =>A lag is not strongly apparent in a comparison of the cumulative number of small-molecule new molecular entities (NMEs) that were discovered from the different approaches during the period analysed.

Follower drugs => ratio of small-molecule NMEs discovered through target-based screening to those discovered through phenotypic screening appears to increase in the second half of the time period.

21
Q

Describe phase I clinical trials

A

Essentially a process to define the MTD

Starting from lower dose (mg/kg) than animal data

Only conducted in a small # (10-15) of adult volunteers

• Terminal cancer patients

22
Q

Describe phase II clinical trials

A
  • Typically 100-300 patients are enrolled
  • Begin with ~MTD from phase I trials
  • Vary dosing regimen
  • Length of study determined by enrollment
  • Active, non toxic drugs proceed to phase III trials
23
Q

Describe phase III clinical trials

A
  • crucial phase involving thousands of patients
  • blinded fashion
  • eliminate bias by pt or investigator
  • multi-center trials simultaneously
  • comparison studies
  • lengthy trials
24
Q

What are the 5 types of clinical trials?

A
  1. controlled/uncontrolled
  2. open or blind
  3. parallel
  4. sequential
  5. cross-over
25
Q

Describe the placebo wrt to clinical trials

A

placebo group patients often improve

effect of drug > than existing agent or placebo

If neither drug “beats” placebo, trial is a bust

26
Q
A