Lipitor is a brand name for atorvastatin, a medication that is used to reduce the levels of cholesterol in the blood. It is a prescription medication that is used to treat high cholesterol and reduce the risk of heart disease. According to the NHS [2], common side effects of atorvastatin include headaches, muscle and joint pain, nosebleeds, sore throat, and a runny or blocked nose. However, there is no information on whether Lipitor can worsen allergy medication side effects.

Allergy medications are used to treat the symptoms of allergies, such as sneezing, itching, and runny nose. According to Medical News Today [3], some common side effects of allergy medications include drowsiness, dry mouth, dizziness, and nausea. However, there is no information on whether Lipitor can worsen these side effects.

Drug Patent Watch [1] provides information on the patents and exclusivity of Lipitor, but it does not provide information on the drug's side effects or interactions with other medications.

In conclusion, while the sources provide information on the side effects of Lipitor and allergy medications, there is no information on whether Lipitor can worsen allergy medication side effects. It is important to consult with a healthcare provider before taking any new medications, including Lipitor and allergy medications, to ensure that they are safe and effective for the individual's specific health needs.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[3] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects