Lipitor is a medication used to lower cholesterol levels in the blood. It is a brand name for the drug atorvastatin [1]. Antihistamines are a class of drugs used to treat allergies and other conditions that cause symptoms such as itching, runny nose, and sneezing [2].

There is no specific information available on how long after taking Lipitor one can take antihistamines. However, it is generally safe to take antihistamines with Lipitor, as there are no known interactions between the two drugs [3].

It is important to note that Lipitor and some antihistamines can cause nightmares and other disturbing dreams as side effects [1, 3]. Therefore, if you experience any unusual side effects while taking these medications together, it is important to consult with your healthcare provider.

In conclusion, while there is no specific information on how long after taking Lipitor one can take antihistamines, it is generally safe to take them together. However, it is important to be aware of the potential side effects of both medications, including nightmares and other disturbing dreams [1, 2, 3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/22947909/
[3] https://www.goodrx.com/drugs/side-effects/medications-that-cause-nightmares-and-disturbing-dreams