Lipitor is a brand name for atorvastatin, a medication that is used to lower cholesterol levels in the body. According to the National Health Service (NHS) [2], it is important to inform your doctor or pharmacist if you are taking any other medications or herbal supplements while taking Lipitor. This is because some medicines and supplements can interact with Lipitor and either increase or decrease its effectiveness. The NHS recommends avoiding grapefruit juice while taking Lipitor, as it can increase the levels of the drug in the blood and lead to side effects.

However, there is no information provided in the sources to suggest that Lipitor can hinder the effectiveness of homeopathic treatments. Homeopathic treatments are not considered to be medications and are not regulated in the same way as drugs [3]. Therefore, there is no known interaction between Lipitor and homeopathic treatments.

If you are considering taking homeopathic treatments to lower cholesterol levels, it is important to speak with your doctor first. According to the British Heart Foundation [3], there is little evidence to support the use of homeopathic treatments for high cholesterol. They recommend making lifestyle changes, such as eating a healthy diet and getting regular exercise, as the first line of treatment for high cholesterol.

Sources:
[2] NHS. Taking atorvastatin with other medicines and herbal supplements. Retrieved from https://www.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/
[3] British Heart Foundation. Cholesterol-lowering alternatives. Retrieved from https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/cholesterol-lowering-alternatives