Company: ACHV
Filing Date: 2025-03-11
Form Type: 10-K
Source: 0000950170-25-036831
Chunk: 29

Company: ACHIEVE LIFE SCIENCES, INC.
Filing Date: 2025-03-11
Form: 10-K
Item: Item 1
Chunk 29
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 United States: “varenicline” (formerly marketed by Pfizer as Chantix) and “bupropion” (formerly marketed by GlaxoSmithKline as Zyban). Both are currently available as generic formulations. Varenicline requires a minimum three-month treatment period and bupropion is recommended for a period between seven and 12 weeks. While both have been proven effective in aiding smoking cessation, they are also associated with significant side effects and early discontinuations from treatment. Varenicline’s labeling indicates elevated instances of nausea, 

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abnormal dreams, constipation, flatulence, and vomiting may be experienced by varenicline-treated patients compared to placebo-treated patients, and buproprion’s product label discloses potential adverse reactions including insomnia, rhinitis, dry mouth, dizziness, nervous disturbance, anxiety, nausea, constipation, arthralgia and seizures. High uptake into the brain combined with activity at “off target” receptors could be responsible for varenicline’s adverse event profile.

In June 2021, Pfizer Inc. halted the distribution of Chantix (varenicline) after heightened levels of a nitrosamine impurity, called N-nitroso-varenicline, which were above the FDA’s acceptable daily intake limit, were found in some lots of Chantix pills. Long-term use of products with N-nitroso-varenicline may be associated with a potential increased cancer risk in humans. In September 2021, Pfizer announced a nationwide recall in the United States of all lots of Chantix and have also withdrawn the product in other countries around the globe. Prior to market withdrawal and launch of generic Chantix (varenicline), global sales of branded Chantix peaked at $1.1 billion.  Of those sales, approximately 75% were attributable to the U.S. market.

The vast majority of OTC smoking cessation aids are NRTs. NRTs come in many forms, including gums, lozenges and patches, and have been shown to be less effective than prescription drugs. For example, a Cochrane Group independent database review of nicotine receptor partial agonists published in 2016 compared varenicline with a number of NRTs and varenicline has been proven to be more effective than the NRTs, as demonstrated in head-to-head studies.

We believe that cytisinicline represents a unique opportunity to significantly impact global