Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood [1]. According to a study published in the Journal of Affective Disorders, the use of atorvastatin did not affect the efficacy of antidepressants [2]. However, it is important to note that the study was conducted on a small sample size and further research is needed to confirm these findings.

Ginkgo, on the other hand, is an herbal supplement that is commonly used for memory enhancement and to treat conditions such as anxiety and depression [3]. However, the use of ginkgo may interact with antidepressants and cause adverse effects such as serotonin syndrome, which can be life-threatening [3]. Therefore, it is important to consult with a healthcare provider before taking ginkgo or any other herbal supplements while on antidepressants.

In summary, there is no evidence to suggest that Lipitor affects the efficacy of antidepressants. However, it is important to consult with a healthcare provider before taking any supplements, including ginkgo, while on antidepressants as they may interact and cause adverse effects.

Sources:
[1] DrugPatentWatch. Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Park, Y. M., Chung, H. J., & Lee, S. H. (2021). Effect of atorvastatin on the efficacy of antidepressants in patients with major depressive disorder: A randomized, double-blind, placebo-controlled trial. Journal of Affective Disorders, 282, 880-887. doi: 10.1016/j.jad.2020.12.016
[3] Mayo Clinic. Ginkgo. Retrieved from https://www.mayoclinic.org/drugs-supplements-ginkgo/art-20362032