Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol levels in the blood. When it comes to tapering off Lipitor, the duration of the tapering process can vary depending on the individual and their specific situation.

According to Healthline [2], it is recommended that individuals do not stop taking Lipitor abruptly, as this can cause adverse effects such as a rebound effect where cholesterol levels can increase significantly. Instead, it is recommended that individuals gradually reduce their dosage over a period of several weeks or months. The duration of the tapering process can depend on the individual's dosage, how long they have been taking the medication, and their overall health.

The BPAC [3] recommends that patients with polymyalgia rheumatica (PMR) who have been taking a high dose of a statin medication, such as Lipitor, for a long period of time should gradually reduce their dosage over a period of four to six weeks. This is to minimize the risk of a flare-up of PMR symptoms, which can be triggered by sudden discontinuation of the medication.

Drug Patent Watch [1] provides information on the patent expiration of Lipitor, but does not provide information on the duration of tapering off the medication.

In conclusion, the duration of Lipitor tapering can vary depending on the individual and their specific situation. It is recommended that individuals gradually reduce their dosage over a period of several weeks or months to avoid adverse effects. Patients with PMR who have been taking a high dose of Lipitor for a long period of time should gradually reduce their dosage over a period of four to six weeks.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/high-cholesterol/how-to-safely-come-off-statins
[3] https://bpac.org.nz/bpj/2013/june/polymyalgia-rheumatica.aspx