Atorvastatin, also known by its brand name Lipitor, is a medication used to lower cholesterol levels in the blood [2]. Dehydration occurs when the body loses more fluids than it takes in, and it can be caused by various factors, including medications [3]. According to Everyday Health, some medications can cause dehydration as a side effect, including blood pressure medications, antihistamines, and diuretics [3]. However, Lipitor is not included in this list.

Drug Patent Watch provides information on the patent status of medications, but it does not provide information on the side effects of medications [1].

The Healthline website provides detailed information on Lipitor, including its uses, dosage, side effects, and precautions [2]. However, there is no mention of dehydration as a side effect of Lipitor on this website [2].

In conclusion, based on the sources provided, there is no evidence to suggest that Lipitor causes dehydration. However, it is important to consult with a healthcare provider before taking any medication to discuss potential side effects and interactions with other medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/drugs/atorvastatin-oral-tablet
[3] https://www.everydayhealth.com/dehydration/common-medications-that-may-cause-dehydration/