Based on the information available, the maximum discount with a Lipitor patient assistance card appears to be 50% [1]. This discount is offered by Pfizer, the manufacturer of Lipitor, through its Pfizer Rx Pathways program [1]. The program provides brand-name medications, including Lipitor, at a savings of up to 50% for eligible patients [1].

To be eligible for the Lipitor patient assistance card, patients must meet certain income and insurance criteria [1]. The program is intended for uninsured and underinsured patients, as well as those facing high out-of-pocket costs [1]. Patients can apply for the program online or by phone [1].

It's important to note that the Lipitor patient assistance card is not a coupon or a one-time discount [1]. It is a program that provides ongoing savings for eligible patients [1]. Additionally, the Lipitor patient assistance card cannot be used in conjunction with insurance coverage or other discount programs [1].

In summary, the maximum discount with a Lipitor patient assistance card is 50%, and the program is intended for uninsured and underinsured patients who meet certain income and insurance criteria.

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor Patient Assistance Program. Retrieved from <https://www.drugpatentwatch.com/lipitor-patient-assistance-program.html>