Lipitor is a medication that is commonly used to lower cholesterol levels in the body. However, it is known to cause muscle strain and pain in some individuals [3]. According to Drug Patent Watch [1], there are no alternative medications to Lipitor with the same active ingredient, atorvastatin. However, there are other types of statins, such as Crestor and Zocor, that can also lower cholesterol levels and may be an alternative for those who experience muscle strain with Lipitor [2]. Additionally, there are non-statin medications, such as ezetimibe and bile acid sequestrants, that can also be used to lower cholesterol levels [3]. It is important to consult with a healthcare provider to determine the best course of action for managing cholesterol levels and preventing muscle strain. Furthermore, lifestyle changes, such as exercise and a healthy diet, can also help lower cholesterol levels and reduce the risk of muscle strain [3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nbcnews.com/health/heart-health/bad-cholesterol-drug-alternative-statins-side-effects-rcna73352
[3] https://www.health.harvard.edu/pain/managing-statin-muscle-pain