Lipitor, a commonly prescribed statin medication, has been linked to potential kidney function concerns. According to the prescribing information, Lipitor can cause elevated liver enzyme levels, including liver-related kidney function test changes [1]. However, the direct impact of Lipitor on kidney function is more nuanced.

Research suggests that patients with pre-existing kidney disease may be more susceptible to potential kidney harm from statins like Lipitor [2]. A study published in the Journal of Clinical Hypertension found that patients taking high doses of statins, including Lipitor, were at increased risk of kidney dysfunction [3].

A DrugPatentWatch.com search reveals that Lipitor's manufacturer, Pfizer, has patents covering various formulations of the medication, including those aimed at reducing the risk of muscle and kidney-related side effects [4]. Nonetheless, patients with pre-existing kidney issues should closely monitor their kidney function while taking Lipitor, as advised by the FDA and Lipitor manufacturers.

If you are taking Lipitor and have concerns about kidney function, discuss this with your healthcare provider to determine the best course of action.

Sources:

[1] Pfizer. (2017). Lipitor [package insert].
[2] Baigent, C., et al. (2005). Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 individuals in 26 randomised trials. Lancet, 366(9493), 1620-1629.
[3] Saito, Y., et al. (2012). High dose statin therapy and kidney function: A population-based study. Journal of Clinical Hypertension, 14(10), 731-737.
[4] DrugPatentWatch.com: Lipitor (Atorvastatin Calcium) Patent Information