As an AI language model, I cannot know why you stopped taking Lipitor. However, I can provide you with some information on why people may stop taking this medication based on the provided sources.

Lipitor is a brand name for atorvastatin, a medication that belongs to a class of drugs called statins. Statins are commonly used to lower cholesterol levels and reduce the risk of heart attack and stroke [1]. According to the sources, there are some reasons why people may stop taking statins, including Lipitor.

One reason people may stop taking statins is due to side effects. Statins can cause muscle pain, weakness, and fatigue, among other side effects [2]. However, not everyone experiences these side effects, and they can often be managed by adjusting the dosage or switching to a different statin [3].

Another reason people may stop taking statins is because they believe they no longer need them. However, stopping statins can increase the risk of heart attack and stroke, especially if someone has a history of these conditions [2]. It is important to consult with a healthcare provider before stopping any medication.

Other reasons people may stop taking statins include cost, forgetfulness, and concerns about the long-term effects of the medication [2]. However, again, it is essential to discuss any concerns with a healthcare provider before making any changes to medication regimens.

In conclusion, there are various reasons why someone may stop taking Lipitor or any other statin medication. However, it is crucial to consult with a healthcare provider before making any changes to medication regimens, as stopping statins can increase the risk of heart attack and stroke [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/classes/statins/stopping-statins-eight-reasons-you-should-not-stop-your-cholesterol-drug
[3] https://www.unitypoint.org/news-and-articles/can-you-stop-taking-statins-once-you-start