Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the body [1]. As with any medication, Lipitor may cause side effects. However, the majority of patients who take Lipitor do not experience any side effects or only experience mild side effects that are manageable [1]. Some of the most common side effects of Lipitor include muscle pain, diarrhea, constipation, and nausea [1]. These side effects are usually mild and go away on their own without any treatment.

It is important to note that Lipitor can also cause serious side effects, although these are rare. Serious side effects of Lipitor include liver problems, muscle damage, and an increased risk of diabetes [1]. Patients taking Lipitor should be monitored closely by their doctor to ensure that they are not experiencing any serious side effects.

In terms of Pfizer's other drugs, the company has recently developed a COVID-19 pill that has shown promising results in clinical trials [2]. However, there are concerns that the drug may have side effects that outweigh its benefits, particularly in patients with certain underlying health conditions [2]. Pfizer has also developed a kidney cancer drug that has been shown to be effective in clinical trials [3].

Overall, while Lipitor may cause side effects, the majority of patients do not experience any serious side effects. Patients taking Lipitor should be monitored closely by their doctor to ensure that they are not experiencing any serious side effects. Pfizer has developed other drugs that have shown promising results in clinical trials, but it is important to weigh the potential benefits against the potential risks of these drugs.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nbcnews.com/health/health-news/pfizer-covid-pills-covid-symptoms-may-risky-drugs-rcna9683
[3] https://www.reuters.com/article/cancer-pfizer-kidney/pfizer-kidney-cancer-drug-effective-in-key-study-idUSN1816631020110518