Drug Development and Regulation of New Products Flashcards
What do you call a drug not generally recognized by qualified experts as safe and effective for use under the conditions recommended in the drug’s labeling? Even if the drug is recognized, it must also have been used to a material extent or for a material time under the conditions recommended in the labeling
New drug
GRASE stands for?
Generally recognized as safe and effective
Drugs may be considered new if (5 reasons)
- The drug contains a new substance
- It is a new combination of approved drugs
- The proportion of ingredients in combination is changed
- There is a new intended use for the drug
- The dosage, method or duration of administration or application is changed
What does INDA stand for?
Investigational new drug application
What are the components of an INDA?
- Proposal such as drug information (name, composition, methods of manufacture and quality control, information from preclinical investigations regarding pharmacological, pharmacokinetic, and toxicological evaluations and investigator/investigation information (experience and qualifications of clinical investigators, outline of proposed clinical trials)
- Testing - 3 phases where you must obtain informed consent from patents/representatives
- Public registry of clinical trials - NDA sponsors must publish summary info about any post phase 1 clinical trial on public registry
Phase 1 and 2 of clinical trials requires what type of consent?
Written consent
Phase 3 permits what type of consent?
Oral consent is permitted if physician decides it is necessary or preferable to written consent and consent is documented in medical chart
What type of clinical phase of the INDA is:
SAFETY - detect ADE (toxicity, metabolism, bioavailability, elimination, pharmacological actions), does not test efficacy
Phase 1
What type of clinical phase of the INDA is:
EFFICACY - determines efficacy of the drug and the dosages at which efficacy occurs
Phase 2
What type of clinical phase of the INDA is:
Safety and efficacy in hundreds or thousands of patients (double blind placebo control)
Phase 3
Drug manufacturers must apply for and receive FDA approval of a ____ before it can be sold and marketed
New drug application (NDA)
What are the required information in an NDA application?
- Full reports of clinical investigations showing the drug’s safety and efficacy
- The drug’s components and composition
- The methods, facilities, and controls used in manufacturing, processing and packaging the drug
- Samples of the drug and its components
- The proposed labeling of the drug
How long does the FDA have to look at an NDA?
180 days but delays are common
What is the median approval time of an NDA?
15 months
What influences the length of the NDA review process?
FDA’s Rating and Classification system
What does the FDA drug rating and classification system indicate?
the number indicates drug’s chemical type and a letter indicates its therapeutic potential
What are examples of chemical types that the FDA can rate?
i. new molecular entity
ii. new active ingredient
iii. new dosage form
iv. new combination of compounds
v. new formulation or new manufacturer
vi. new indication - drug product previously marketed by the same firm
vii. drug already marketed without an approved NDA
viii. OTC switch
ix. new indication submitted as distinct NDA consolidated with original NDA after approval
x. new indication submitted as a distinct NDA, not consolidated
What does a therapeutic potential P mean?
Priority, the drug represents a therapeutic advance for one of the following reasons: no other effective drugs are safe, is more effective or safe than drugs currently used, has important advantages such as greater convenience, reduced side effects, or improved tolerance or usefulness in special populations
What does a therapeutic potential S mean?
Standard, similar to those drugs already on the market and at best only offers minor improvements
What does a therapeutic potential O mean?
Orphan, rare disease affecting <200,000
What does a manufacturer need to submit if they want to make any changes in the drug or its production, even minor ones, after approval of an NDA?
Supplemental NDA
Which supplemental NDA procedure allows sponsors to make changes to their product before FDA approves it?
Change Being Effected (CBE) supplement - includes certain types of labeling changes like strengthening warnings or dosage and administration information, or for certain changes n manufacturing methods, facilities, and controls
Which supplemental NDA procedure does not allow sponsors to make any changes before the FDA approves?
Prior Approval Required for production changes - changes range from synthesis of drug to manufacturing process of the drug to the labeling of the drug
What supplement NDA procedure allows sponsors to only report in the annual report to the FDA?
Minor changes - editorial changes in labeling or changes in container size
What is post market surveililance?
Once an NDA has been approved, manufacturer may distribute drug in interstate commerce
Must maintain and establish post-marketing records and reports and must submit reports of any serious ADR and any new information relating to the drug’s safety and efficacy
Can the FDA withdraw approval for an NDA during post market surveillance?
Yes, if the investigational drug is tested in a small number of patients compared to the population or if long term adverse effects are discovered after approval
In what phase do manufacturers engage in post market clinical studies?
Phase IV - this is when they determine new uses or abuses for a drug and obtain additional safety or efficacy data for labeled indications
Which amendment granted the FDA agency authority to require phase IV?
Food and Drug Administration Amendments Act
What can the FDA require a drug product sponsor to sign-up for in order to establish special procedures directed at patient safety so that potential serious risks of the drug product are managed?
Risk Evaluation and Mitigation Strategy (REMS) program
When can the FDA require REMS?
pending NDA or they can mandate a REMS post-market, when FDA believes it necessary to ensure the benefits of the drug outweigh the risk
What do drug sponsors need to submit to show whether the drug’s risks are being adequately managed?
Periodic post-market assessments
What are the potential procedures required under REMS?
- Distribution of Medication Guides
- Patient PI
- Communication plan aimed at health care professionals
- ETASU - elements to assure safe use
- May require that health care providers have special training or experience, drug may only be dispensed in specific settings, and/or that the patient enroll ini a registry and agree to testing and monitoring
What is post market labeling?
Prior to FDAAA, the FDA didn’t have authority to require manufacturers to include additional safety information or warnings in labeling after a drug was marketed. Now they can compel to change safety related labeling
What is the proactive surveillance system designed to detect early signs of medication risk and safety problems by querying broad arrays of information data sources like EHRs, insurance claims databases?
Sentinel Initiative
What are the efforts FDA will undertake to communicate risks to, commonly, pharmacists?
Risk communication strategic plan
This program was implemented in response to the Kefauver-Harris Amendment requiring drugs to be effective as well as safe
Drug Efficacy Study Implementation Program (DESI): FDA retroactively treated generic drugs as new drugs and required manufacturers to prove efficacy
Under the Drug Efficacy Study Implementation Program (DESI), thousands of drugs approved between 1938 and 1962 were categorized into one of the six categories:
- Effective
- Probably effective
- Possibly effective
- Ineffective
- Effective, but
- Ineffective as a fixed combination
DESI created the Abbreviated New Drug Application (ANDA). What is it?
proof of safety and efficacy NOT REQUIRED, but rather only proof of BIOEQUIVALENCE and proof of acceptable manufacturing methods and controls
This Act allowed generic manufacturers not to have to duplicate actual research establishing safety and efficacy of innovator drug, but submit on the basis of published scientific data
Drug Price Competition and Patent Term Restoration Act (PTRA) or aka Hatch-Waxman Act
(T/F) The Drug Price Competition and Patent Term Restoration Act (PTRA) statutorily created the ANDA process where manufacturer only had to prove bioequivalence and acceptable manufacturing methods and controls
True
The PTRA allows FDA to grant innovator drugs what benefits?
- Patent term extensions as long as patent has not expired
- Market exclusivity for an innovator manufacturer that develops a new chemical entity or a new use for a previously approved drug (new chemical entities have 5 years from the approval of the drug and new uses have 3 years)
What do generic manufacturers need to make to obtain approval for an ANDA?
Patent certification, there are 4 types:
- NDA holder didn’t file information on the patent to the FDA (so no patent)
- The patent already expired
- The date the patent will expire
- The patent is invalid or will not be infringed upon by the manufacture, use, or sale of the generic applicant’s drug (applicant must notify patent owner and NDA holder citing factual and legal basis for why patent is invalid or FDA cannot approve ANDA for 30 months unless a court issues final ruling that patent is invalid before 30 months is up)