Based on the information available, there is limited research on the specific interaction between Lipitor (atorvastatin) and probiotics. Therefore, it is crucial to consult with a healthcare provider before combining these two.

Lipitor is a statin medication used to lower cholesterol levels, while probiotics are live bacteria and yeasts that are beneficial for gut health [1]. Potential risks of combining these two may include:

1. Decreased effectiveness of Lipitor: Probiotics may affect the gut's microbiome, which could potentially impact the absorption and metabolism of Lipitor. This could lead to decreased effectiveness of Lipitor in lowering cholesterol levels [2].

2. Increased risk of myopathy: Myopathy is a muscle disorder that can be a side effect of Lipitor. Probiotics may increase the risk of myopathy by affecting the metabolism of Lipitor [3].

3. Adverse reactions: Combining Lipitor and probiotics may result in adverse reactions, such as gastrointestinal symptoms like bloating, diarrhea, and abdominal pain [4].

It is important to note that more research is needed to fully understand the potential risks of combining Lipitor and probiotics. Patients should consult with their healthcare provider before starting any new medication or supplement, including probiotics [5].

Sources:
[1] Mayo Clinic. (2021). Probiotics. <https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/probiotics/faq-20058065>.
[2] Gut Microbiota for Health. (2018). Statins and the gut microbiota. <https://www.gutmicrobiotaforhealth.com/statins-gut-microbiota/>.
[3] Drugs.com. (2021). Atorvastatin. <https://www.drugs.com/atorvastatin.html>.
[4] National Center for Complementary and Integrative Health. (2019). Probiotics: What You Need To Know. <https://www.nccih.nih.gov/health/probiotics-what-you-need-to-know>.
[5] DrugPatentWatch. (2021). Lipitor. <https://www.drugpatentwatch.com/drugs/lipitor>.