Lipitor, a brand name for the drug atorvastatin, is a cholesterol-lowering medication used to treat high cholesterol and heart disease. Blood thinners, such as warfarin or Coumadin, are medications used to prevent blood clots from forming. When taken together, these medications can increase the risk of certain long-term effects.

According to DrugPatentWatch.com, a website that tracks drug patents and their expiration dates [1], Lipitor's patent has expired, making it a generic medication. However, generic versions of the medication can have similar side effects.

When taken long-term, Lipitor can cause muscle damage, also known as myopathy, in some people [2]. In rare cases, this can lead to life-threatening muscle damage called rhabdomyolysis. Additionally, Lipitor can cause elevated liver enzymes, which may indicate liver damage.

Blood thinners, particularly warfarin, can cause bleeding complications, such as easy bruising, nosebleeds, and gastrointestinal bleeding, as their main long-term side effect [3].

When taken together, Lipitor and blood thinners can increase the risk of bleeding complications, particularly gastrointestinal bleeding [4]. This is because Lipitor can increase the metabolism of blood thinners, reducing their effectiveness and increasing the risk of bleeding.

Other potential long-term effects of taking Lipitor and blood thinners together include:

* Kidney damage: Both Lipitor and blood thinners can cause kidney damage, particularly when taken together.
* Nerve damage: Some people taking Lipitor and blood thinners may experience nerve damage, also known as peripheral neuropathy.
* Cognitive impairment: Some studies suggest that taking statins like Lipitor long-term may be associated with cognitive impairment.

It's essential to note that the risks associated with taking Lipitor and blood thinners together can be minimized by closely monitoring the levels of both medications in the blood and making adjustments to the dosage as needed. Patients should work closely with their healthcare provider to manage any potential side effects.

Sources:
[1] DrugPatentWatch.com
DrugPatentWatch.com: Atorvastatin (Lipitor) patent expiration date
[2] MedlinePlus. (2023). Atorvastatin
MedlinePlus: Atorvastatin
[3] MedlinePlus. (2023). Warfarin
MedlinePlus: Warfarin
[4] DrugBank. (2023). Warfarin
DrugBank: Warfarin