Determining the appropriate dosage increase for Lipitor (atorvastatin) requires consulting with a healthcare professional. However, we can provide some general information based on the sources you provided.

Lipitor is a medication used to lower cholesterol levels in the body. The dosage and any adjustments should be determined by a healthcare provider based on an individual's specific needs and medical history. It is important to follow the instructions provided by your doctor or pharmacist and not to adjust the dosage without consulting them first.

According to the Drug Patent Watch website, Lipitor is available in various strengths, including 10 mg, 20 mg, 40 mg, and 80 mg tablets [1]. The appropriate dosage will depend on factors such as the patient's age, medical condition, and response to treatment.

The Mayo Clinic provides general guidelines for the proper use of atorvastatin, which is the generic name for Lipitor. It is usually taken once daily, with or without food, at the same time each day. The recommended starting dose for most adults is 10-20 mg per day, and the maximum recommended dose is 80 mg per day. The dosage may be adjusted based on individual response and tolerance, but this should be done under the guidance of a healthcare professional [2].

The National Health Service (NHS) in the UK also provides information on how and when to take atorvastatin. They recommend taking it at bedtime, as cholesterol production is highest during the night. They advise against consuming grapefruit juice while taking atorvastatin, as it can increase the risk of side effects [3].

In summary, the appropriate dosage increase for Lipitor should be determined by a healthcare professional based on an individual's specific needs and response to treatment. It is important to follow the instructions provided by your doctor or pharmacist and not to adjust the dosage without consulting them first.

Sources:
[1] Drug Patent Watch. Lipitor - Tradename Details. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Mayo Clinic. Atorvastatin (Oral Route) - Proper Use. Retrieved from https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/proper-use/drg-20067003
[3] NHS. Atorvastatin. Retrieved from https://www.nhs.uk/medicines/atorvastatin/how-and-when-to-take-atorvastatin/