Lipitor is a brand name for atorvastatin, a medication that is used to lower cholesterol levels in the blood [1]. Antacids, on the other hand, are medications that are used to neutralize stomach acid and relieve heartburn, indigestion, and acid reflux [2].

According to Verywell Health, there are no significant interactions between Lipitor and antacids. However, antacids that contain aluminum or magnesium may reduce the absorption of Lipitor, which may make it less effective in lowering cholesterol levels. Therefore, it is recommended to take Lipitor at least two hours before or after taking antacids [2].

PeaceHealth also advises that taking Lipitor with antacids may decrease the effectiveness of Lipitor. They recommend taking antacids at least two hours before or after taking Lipitor [3].

In summary, there are no major side effects of combining Lipitor and antacids, but it is important to take them at least two hours apart to avoid reducing the effectiveness of Lipitor. It is always recommended to consult with a healthcare provider before taking any new medications or changing your medication regimen [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.verywellhealth.com/statin-side-effects-and-drug-interactions-698202
[3] https://www.peacehealth.org/medical-topics/id/hn-1090009