On November 21, US Food and Drug Administration (FDA) released 13 scientific policy memos for reviewing premarket applications for e-cigarettes, spanning from 2020 to 2023. The FDA stated that these memoranda describe the processes and priority methods used for filing and reviewing flavored e-cigarettes and other PMTA applications. ( Read more: "FDA Issues 13 Policy Memos on Flavored E-Cigarette Review Methods").
In light of the memo released, 2Firsts conducted research and consulted with multiple compliance experts and found that the importance of "age gating technology" has been emphasized, meaning devices with age verification will receive priority review. Additionally, some memos also revealed the FDA's additional requirements for flavor studies in later reviews.
Products With Age-Gating Features to Receive Priority Review
A memorandum titled "Filing Prioritization for PMTAs received between September 10, 2020 to November 3, 2021" provides a detailed overview of FDA's policy and background on prioritizing PMTAs that have been received.
In the Memorandum, FDA explained the core principles behind its review prioritization, focusing on two main aspects:
- Submission Date: Applications are generally reviewed in the order they were submitted. For example, a PMTA submitted on September 10 would take priority over one submitted on September 15.
- Special Priorities: Certain applications featuring unique technologies or significant public health benefits may be prioritized. The memos specifically highlighted a PMTA submitted by a company incorporating "age-gating technology." Due to its potential public health impact, this application was prioritized for filing. FDA stated, "The application was prioritized for filing because it contains purported age-gating technology."
"The memos reveal that products with 'age-gating' technology can expedite review, bypass the second round, and proceed directly to the third stage of evaluation," said Kurt, compliance consultant of 2Firsts.
Kurt further explained, "My understanding is that FDA prioritizes reviewing products with age gating features, allowing them to advance directly to the third-stage queue. However, the review standards remain unchanged."
He also noted that this highlights FDA's logic in reviewing vapes: devices with age verification features effectively prevent youth usage and are therefore considered a priority.
Kurt added that such products may not require costly randomized controlled trials (RCTs) or longitudinal cohort studies, as their design inherently addresses youth misuse prevention.
Flavored Products Must Demonstrate "Incremental Benefits"
In a memo titled "ENDS Containing Non-Tobacco Flavored E-Liquid: Approach to PMTAs Not in Substantive Scientific Review (Phase III)," FDA outlined its regulatory strategy for premarket tobacco product applications (PMTAs) for non-tobacco flavored vapes (ENDS).
In the memo, FDA explained its review criteria, citing Section 910 of the Federal Food, Drug, and Cosmetic Act (FD&C Act). A key factor in the review is whether the product is "appropriate for the protection of public health" (APPH). Non-tobacco-flavored vapes must demonstrate "incremental benefits" for adult smokers compared to tobacco flavored products.
"Incremental benefits" require submitters to prove that non-tobacco flavored products offer additional advantages for adult smokers over tobacco-flavored options or other existing alternatives. This assessment requires evidence from randomized controlled trials (RCTs) or longitudinal cohort studies.
Applications lacking such evidence are deemed to have a "fatal flaw", which may result in a Marketing Denial Order (MDO).
Kurt stated that since July 2021, FDA introduced a new requirement for long-term clinical testing for flavored products as part of its review process. This additional requirement led to many companies being deemed non-compliant, with thousands of MDOs issued. Subsequently, numerous lawsuits were filed against FDA, claiming that this requirement violated the original PMTA review standards.
So, how does FDA define "non-tobacco flavors"?
An addendum memo titled "Addendum to Approach to PMTAs for Non-Tobacco Flavored ENDS Not in Substantive Scientific Review (Phase III)" provides answers. It includes a detailed list clarifying which products are considered non-tobacco flavors and defines the scope of "tobacco" and "menthol" flavors.
According to Kurt, the tobacco and menthol flavors outlined in these lists are not subject to flavor-specific reviews. Only FLAVOR SKU undergoes the long-term clinical trial review for potential "fatal flaws." Without supporting evidence, FDA will issue MDO letters for these products.
This is the fourth batch of memos released in 2024, bringing the total number of regulatory science policy memos issued by FDA to 26. While FDA states that these memos should not be used as tools, guides, or manuals for preparing or submitting applications, analyzing and interpreting them can still provide deeper and more accurate insights into FDA's review philosophy and approach to vape regulation.
2Firsts will continue to report the latest developments in U.S. vape regulatory policies.
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