When taking Lipitor (atorvastatin), it is essential to be aware of potential allergic reactions. While allergies specific to Lipitor are not common, individuals with a history of allergic reactions to atorvastatin or any other statin medications should avoid Lipitor. Symptoms of an allergic reaction may include rash, itching, swelling, severe dizziness, or trouble breathing. It is crucial to seek immediate medical attention if any signs of an allergic reaction occur. It is advisable to consult a healthcare provider before starting any new medication, especially if there is a history of drug allergies [3][2][1].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[3] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003