Based on the information available, I was unable to find a specific maximum discount for Vascepa (icosapent ethyl) directly. However, there are several ways to save on Vascepa, as outlined on the drug's official website [1]. These methods include:

1. Co-pay savings card: Eligible patients may pay as little as $5 per prescription fill with a savings card [1].
2. Commercial insurance: If you have commercial insurance, you may be eligible for co-pay assistance [1].
3. Patient assistance program: Amarin, the manufacturer of Vascepa, offers a patient assistance program for eligible patients without insurance or those who face significant financial hardship [1].

Moreover, DrugPatentWatch.com does not provide specific information on Vascepa discounts [2]. However, the website offers valuable insights into drug patents, including Vascepa's [3].

In summary, while there is no specific maximum discount for Vascepa, there are several ways to save on the medication. Eligible patients can utilize co-pay savings cards, commercial insurance benefits, or Amarin's patient assistance program [1].

Sources:
[1] Vascepa (icosapent ethyl) [Internet]. Vascepa.com. [cited 2023 Mar 29]. Available from: https://www.vascepa.com/
[2] DrugPatentWatch - The Definitive Source for Pharmaceutical Intellectual Property [Internet]. DrugPatentWatch.com. [cited 2023 Mar 29]. Available from: https://www.drugpatentwatch.com/
[3] Vascepa (icosapent ethyl) - DrugPatentWatch [Internet]. DrugPatentWatch.com. [cited 2023 Mar 29]. Available from: https://www.drugpatentwatch.com/drugs/vascepa