Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. Antacids are a group of medications used to treat acid reflux and heartburn. According to the sources provided, there is no specific time interval that must be observed between taking Lipitor and antacids.

However, it is important to note that certain antacids can interact with Lipitor and reduce its effectiveness. Antacids containing aluminum or magnesium hydroxide, such as Maalox or Mylanta, can decrease the absorption of Lipitor into the bloodstream [2]. Therefore, it is recommended to take Lipitor at least two hours before or after taking an antacid that contains aluminum or magnesium hydroxide [1].

It is also important to consult with a healthcare provider or pharmacist before taking any new medications, including antacids, while on Lipitor. They can provide guidance on potential drug interactions and the best way to take medications to ensure their effectiveness and safety.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.everydayhealth.com/antacids/guide/
[3] https://www.goodrx.com/azithromycin/interactions