1. Center for Tobacco Products. Premarket Tobacco Product Applications. FDA. September 7, 2023. Accessed February 7, 2024. https://www.fda.gov/tobacco-products/market-and-distribute-tobacco-product/premarket-tobacco-product-applications
2. Center for Tobacco Products. Regulation and Enforcement of Non-Tobacco Nicotine (NTN) Products. FDA. February 6, 2024. Accessed February 7, 2024. https://www.fda.gov/tobacco-products/products-ingredients-components/regulation-and-enforcement-non-tobacco-nicotine-ntn-products
3. Spree Bar, a vaping system delivering a synthetic nicotine analogue, marketed in the USA as ‘PMTA exempt’
4. NixamideTM 100mg/mL. Nicotine River. Accessed February 7, 2024. https://nicotineriver.com/products/nixamide-100mg-ml
5. Flavorless Nixotine (unFlavored Nixodine). ECBlend. Accessed February 7, 2024. https://www.ecblendflavors.com/flavorless-nixotine-unflavored-nixodine/