Lipitor is a brand name for the drug atorvastatin, which is a type of medication used to lower cholesterol levels in the body [1]. According to Medical News Today, some of the side effects of Lipitor include muscle pain, weakness, and cramps, as well as an increased risk of developing type 2 diabetes and liver damage [2]. However, the sources provided do not mention anything about Lipitor affecting blood pressure spikes.

A study published in the Journal of Clinical Hypertension found that atorvastatin had no significant effect on blood pressure in patients with hypertension [3]. However, this study did not specifically examine the relationship between Lipitor dosage and blood pressure spikes.

Overall, while Lipitor may have potential side effects, the sources provided do not suggest that it has a direct effect on blood pressure spikes. It is important to consult with a healthcare provider about any concerns regarding medication and its potential effects on one's health.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects
[3] https://pubmed.ncbi.nlm.nih.gov/21881597/