Lipitor and SSRI are two different types of drugs that are used to treat different conditions. Lipitor is a cholesterol-lowering medication, while SSRIs are used to treat depression and anxiety disorders. There is limited information available on the specific dosages to follow when taking Lipitor and SSRI together. However, there are some drug interactions that need to be considered.

According to the COVID-19 Treatment Guidelines, Ritonavir-boosted Nirmatrelvir (Paxlovid) may interact with Lipitor and increase the risk of side effects. Therefore, patients taking Lipitor and Paxlovid should be monitored closely for any adverse effects [2].

In a study published in the Journal of Clinical Psychopharmacology, it was found that there was no significant interaction between Lipitor and SSRIs. However, the study was limited by its small sample size, and further research is needed to confirm these findings [3].

It is important to note that patients should always consult their healthcare provider before taking any medications, including Lipitor and SSRIs. The healthcare provider can provide personalized recommendations on the dosages and potential drug interactions based on the patient's medical history and current medications [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.covid19treatmentguidelines.nih.gov/therapies/antivirals-including-antibody-products/ritonavir-boosted-nirmatrelvir--paxlovid-/paxlovid-drug-drug-interactions/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9827898/