Antacids are commonly used to treat heartburn, indigestion, and other gastrointestinal issues. Lipitor, on the other hand, is a medication used to lower cholesterol levels in the body. According to the sources provided, there are no known interactions between antacids and Lipitor [2][3]. Therefore, it is generally safe to take antacids and Lipitor together. However, it is important to note that certain antacids, such as aluminum and magnesium hydroxide, can decrease the absorption of Lipitor in the body [2]. To avoid this, it is recommended to take Lipitor at least two hours before or after taking antacids that contain aluminum or magnesium hydroxide [2][3]. It is always important to consult with a healthcare provider before taking any new medications or changing the dosage of existing medications.

Sources:
[2] Statin Side Effects and Drug Interactions. Verywell Health. https://www.verywellhealth.com/statin-side-effects-and-drug-interactions-698202
[3] Lipitor Drug Interactions. Drug Patent Watch. https://www.drugpatentwatch.com/p/tradename/LIPITOR