MPJE Drug Substitution and Generic Drug Laws 2 — Questions and Answers
Question 1: ANDA is the abbreviation for:
- Abbreviated New Drug Application (Correct answer)
- Approved New Drug Authorization
- Alternate New Drug Approval
- Advanced New Drug Assessment
Correct answer: Abbreviated New Drug Application
ANDA stands for Abbreviated New Drug Application, the regulatory pathway generic manufacturers use to obtain FDA approval without conducting full clinical trials.
Question 2: A 'B' rating (e.g., BX, BN) in the Orange Book indicates that the drug product:
- Is not currently considered therapeutically equivalent to other products with the same active ingredient (Correct answer)
- Is therapeutically equivalent and freely substitutable
- Is a single-source brand with no generic available
- Has received accelerated approval from the FDA
Correct answer: Is not currently considered therapeutically equivalent to other products with the same active ingredient
A 'B' rating indicates FDA does not currently consider the product therapeutically equivalent to other drugs with the same active ingredient due to actual or potential bioequivalence issues.
Question 3: Therapeutic substitution differs from generic drug substitution because therapeutic substitution:
- Involves replacing the prescribed drug with a chemically different drug that has similar therapeutic effects (Correct answer)
- Involves dispensing a different manufacturer's version of the same chemical entity
- Is permitted without prescriber authorization in most states
- Requires less regulatory oversight than generic substitution
Correct answer: Involves replacing the prescribed drug with a chemically different drug that has similar therapeutic effects
Therapeutic substitution replaces a prescribed drug with a chemically different entity having similar therapeutic effects, whereas generic substitution replaces it with the same chemical entity from a different manufacturer.
Question 4: Under most state drug product selection laws, when a pharmacist substitutes a generic drug, the patient must be:
- Notified of the substitution and given the opportunity to request the brand-name product (Correct answer)
- Automatically charged the same copay as the brand-name drug
- Required to sign a written consent form prior to dispensing
- Provided a written statement from the prescriber approving substitution
Correct answer: Notified of the substitution and given the opportunity to request the brand-name product
Most state laws require pharmacists to notify patients of generic substitution and offer them the option to receive the brand-name drug, protecting patient autonomy.
Question 5: The 'first-to-file' provision of the Hatch-Waxman Act rewards the first generic manufacturer to challenge a brand drug patent with:
- 180 days of marketing exclusivity before other generics may enter the market (Correct answer)
- Permanent patent rights over the generic formulation
- Automatic FDA approval without bioequivalence testing
- A 5-year data exclusivity period
Correct answer: 180 days of marketing exclusivity before other generics may enter the market
Under Hatch-Waxman, the first generic manufacturer to file a Paragraph IV patent certification receives 180 days of marketing exclusivity as an incentive to challenge brand drug patents.
Question 6: Narrow therapeutic index (NTI) drugs require special consideration during generic substitution because:
- Small differences in blood drug levels can result in therapeutic failure or serious toxicity (Correct answer)
- They are always more expensive than other drug products
- They require a DEA registration number for dispensing
- They are excluded from the Orange Book rating system
Correct answer: Small differences in blood drug levels can result in therapeutic failure or serious toxicity
NTI drugs have a narrow margin between therapeutic and toxic blood concentrations, meaning even minor bioequivalence differences can have significant clinical consequences.
Question 7: A prescriber who wishes to prevent generic substitution should write which of the following on a prescription?
- DAW or Brand Medically Necessary (Correct answer)
- Generic Acceptable
- Formulary Substitution Permitted
- May Substitute Equivalent
Correct answer: DAW or Brand Medically Necessary
Writing 'DAW' (Dispense as Written), 'Brand Medically Necessary,' or 'No Substitution' instructs the pharmacist to dispense the specific brand-name product without generic substitution.
MPJE Drug Substitution and Generic Drug Laws 2
ANDA is the abbreviation for: