(After pg 4 of outline)Law Outline Drug development and regulation of new products Flashcards
NDA vs ANDA Review Process
Controversies
- Health care providers
- Drug Manufacturers
- Section 505(b)(2) NDA
Controversies
- Health care provider
- Treatment differences- law allows generic to statistically vary in rate and extent of absorption by + 20% from innovator drug. There could be up to a 40% difference in blood level between a generic and innovator in the course of 2 months of therapy, resulting in adverse clinical outcomes.
- Data analysis of generic and innovator drugs- average difference is 3.5%, which shouldn’t produce clinical differences.
- Whether generic can be dispensed for indication that the innovator had been granted market exclusivity?
- Answer- yes; ex: generic propranolol for post-MI, when innovator brand propranolol has marketing exclusivity for this condition. This would be use of an approved drug for an off-label use
- But, can FDA approve ANDA for generic drug when the labeling of the generic drug won’t include all conditions/indications listed for innovator drug?
- Yes- generic labeling can still be effective and safe without all listed indications
- And, because new generic drugs could be delayed- innovator drug manufacturers could strategically file for supplemental indications every three years to delay generic manufacturing.
Controversies
- Drug Manufacturers
- Drug Manufacturers
- “Authorized generics” innovator drug manufacturer will produce a generic version of brand name product just as patent is about to expire or be successfully challenged.
- Innovator may do with without an ANDA
- 30 month stay in ANDA approval when patent holder sues generic for patent infringement- many manufacturers sue to obtain the 30 month exclusivity even though they have very weak legal positions and little chance of prevailing.
- Secondary patents that cover manufacturing processes, methods of use, and new tablet coatings
- “product hopping”- when patent nears the end, manufacturer will change product- extended release, different salt, to secure additional patent
- Pay for delay- innovator will pay generic company not to market generic
Controversies
- Section 505(b)(2) NDA:
- Section 505(b)(2) NDA: manufacturer is allowed to rely, at least in part, on published safety and efficacy data, and/or the FDA’s findings for a previously approved drug, reducing the number of clinical trials required. This is NDA route so it includes 3-5 years of market exclusivity
- Reasons for filing 505(b)(2) application:
- Manufacturer of a drug approved under previous NDA might use this pathway to receive approval for new indications, relying on the safety data of previous NDA
- Generic manufacturer might use this pathway instead of a full NDA when the generic product can’t be approved under an ANDA because of significant changes from the reference product in terms of different formulation, route of administration, or delivery mechanism
OTC review
- After prescription drugs review under DESI, FDA began reviewing OTCs marketed between 1938 and 1962. Different review system for OTC.
- Evaluates based on therapeutic categories and classifies products through rule making rather than individually.- Nearly all OTCs had been prepared from only about 200 active ingredients.
- Procedure-
- FDA appointed advisory review panel of qualified experts to consider drugs by class (analgesic, antacids, etc.) and to make recommendations
- FDA publishes recommendations in Federal Register, requesting public comment
- After comments, FDA publishes a proposed rule in Federal Register.
- FDA publishes monograph, identifying which active ingredients are generally recognized as safe and effective and may therefore be marketed. Monograph specifies labeling.
- Products that do not contain approved active ingredients or labeling must be removed and where possible reformulated and relabeled.
- Monograph on reviewed ingredients specifies in which of three categories the ingredient is placed:
- Cat I- generally recognized as safe, effective, and not misbranded
- II- not generally recognized as safe and effective or that are misbranded
- III data available are insufficient to permit classification
Medwatch Program
- FDA maintained voluntary reporting program- MedWatch
- Health care professionals to report any serious adverse events, potential and actual product use errors, and product quality problems related to drugs, biologics, medical devices, special nutritional products and cosmetics.
- Official reporting form available: http://www.fda.gov/Safety/MedWatch/
- Available information for safety alerts- practice tip!
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Pharmacy requirement to provide patients with medwatch number- FDAAA broadened the program to include patient reporting.
- Pharmacies must provide patients with a notification of a toll-free number so they can report adverse events on new and refills.
- Call you doctor for medical advice about side effects. You may report side effects to the FDA at 1800 FDA- 1088.
- Sticker attached to the container or package
- On preprinted vial cap
- On separate piece of paper
- In patient medication information distributed by pharmacy
- In MedGuide
- Call you doctor for medical advice about side effects. You may report side effects to the FDA at 1800 FDA- 1088.
- Pharmacies must provide patients with a notification of a toll-free number so they can report adverse events on new and refills.
Marketing unapproved drugs
NOT ALL MARKETED DRUGS HAVE BEEN APPROVED BY THE FDA
FDA estimates that as many as several thousand prescription and OTC drug products are marketed illegally without approval. Why? How?
- Until DESI was instituted in 1968, FDA had a policy of allowing post 1938 generics to be marketed as not new drugs if the pioneer or innovator drug had a safe marketing history
- During this time, FDA allowed some drugs to be marketed that were not identical or similar to other marketed drugs, FDA felt they were not new drugs/or because agency didn’t take action against them
- Some drugs are still being reviewed under desi- FDA has allowed them to be marketed while pending review
- Some drugs have been determined to lack efficacy after DESI review, but haven’t yet been removed from market
- Some drugs marketed claim to be grandfathered as pre-1938 drugs, but have changed their labeling or composition, thus voiding their exempted status
- Some drug manufacturers market product without approval, hoping to escape notice as long as possible
- Illegally marketed OTCs either because monographs don’t allow ingredients, or because never subject to OTC DESI review.
Will remain on market-
Have to be identified, then legally removed- investment of time and resources
Prioritized: enforcement of drugs
Safety risk
Those that lack evidence of effectiveness,
Those that involve health fraud
Drugs Intend to Treat Serious Life Threatening Diseases
- Patient treatment with investigational drugs
- Individual patient access to investigational drugs for serious diseases
- FDA Expanded Access Program
- State and federal right to try laws (Arizona)
- Patient treatment with investigational drug
- FDAMA modified FDCA to state that an investigational drug may be provided for widespread access outside controlled clinical trials to treat patients with serious or immediately life-threatening diseases for which no comparable or satisfactory alternative therapy is available. FDA will approve treatment only IF
- Used for serious or immediately life threatening disease or condition
- There is no comparable or satisfactory alternative therapy available
- The drug is under investigation for the disease or condition
- The sponsor is actively pursuing marketing approval of the drug
- In the case of serious diseases, there is sufficient evidence of safety and effectiveness for use
- In the case of immediately life-threatening diseases, there is a reasonable basis to conclude that the drug may be effective and would not expose patients to unreasonable and significant risk.
- Individual patient access to investigational drugs for serious diseases
- FDAMA provides that an individual acting through physician may request an investigational drug from manufacturer if
- Patient has no comparable satisfactory alternative therapy
- And the risk to the patient from the drug is no greater than the risk from the disease or condition
- FDA must determine that there is sufficient evidence of safety and effectiveness to support its use and that the individual’s use will not interfere with clinical investigations.
- Sponsor must submit protocol describing drug use
- Originally restricted to Phase 3 drugs, but new regulations passed after and during litigation permit potential access to even phase 1 drugs.
- FDA Expanded Access Program
permits patients with life-threatening diseases or conditions who have exhausted approved treatment options to seek access (through their treating physician) to experimental drugs even in Phase I. Also expands and clarifies the treatment use of experimental drugs
- Biggest barriers- FDA cannot compel drug manufacturers to provide IND drugs and many have refused to provide the drugs because of a limit supply, safety concerns because of the limited testing, or fear that an adverse event will ultimately jeopardize the drug’s approval.
- State and federal right to try laws (Arizona)
- FDA contends it has approved 99% of the 5,800 applications for IND drug treatment under expanded access.
- About 30 states (including Arizona) have passed right to try laws that allow patient to go directly to manufacturer and bypass the FDA. However, manufacturer is not obligated to provide the drug, and a patient’s insurance may withhold coverage for care if a patient takes an unapproved drug
- Federal right to try amends the FDCA by creating an alternative pathway to investigational new drugs by removing the FDA from the process. Some patients may choose to still apply through the FDA
biologics
- Products derived from living organisms, and include viruses, therapeutic serums, toxins, antitoxins, vaccines, blood, and blood components, and derivatives applicable to the prevention, treatment, or cure of a disease or condition of humans.
- Regulated under Public Health Service Act and FDCA.
- ACA (Affordable Care Act) 2010, created a regulatory framework to approve generic biologics or biosimilars. Biologics Price Competition and Innovation Act (BPCIA)- creates a regulatory framework to facilitate the approval of generic biologics (biosimilars)
biologics
- Regulated under Public Health Service Act and FDCA.
- Require premarket approval by FDA and subject to FDCA requirements like new drug products, they are licensed under Public Health Service Act.
- FDA will approve a license upon demonstration that the product is safe, pure, and potent, and that the manufacturing facility meets required standards.
biologics
- ACA
- ACA (Affordable Care Act) 2010, created a regulatory framework to approve generic biologics or biosimilars. Biologics Price Competition and Innovation Act (BPCIA)- creates a regulatory framework to facilitate the approval of generic biologics (biosimilars)
- Grants FDA authority to determine whether a biosimilar is therapeutically equivalent to a reference biologic and thus can be substituted in the same manner as generic drugs.
- Controversial- since manufacturing process of biologics is complex and innovating.
- Purple book- lists biological products including any biosimilar and interchangeable biologic products licensed by FDA