Booster; Peripheral neuropathy; Numbness; She has trouble putting her arm down; She can't sleep on that side and after she is just like steroid in her neck and and its going down the left arm; She is in a lot of pain; This is a spontaneous report received from a contactable reporter(s) (Pharmacist).  A 83 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date Oct2021 (Batch/Lot number: unknown) at the age of 83 years as dose number unknown (booster), single for covid-19 immunisation. Relevant medical history included: "Osteoporosis" (unspecified if ongoing), notes: She does have like osteoporosis. Concomitant medication(s) included: FOSAMAX; LIPITOR. Vaccination history included: Covid-19 vaccine (Manufacturer Unknown), when the patient was 83 years old, for COVID-19 Immunization. The following information was reported: IMMUNISATION (medically significant) with onset Oct2021, outcome "unknown", described as "Booster"; NEUROPATHY PERIPHERAL (medically significant) with onset Oct2021, outcome "unknown", described as "Peripheral neuropathy"; HYPOAESTHESIA (non-serious) with onset Oct2021, outcome "unknown", described as "Numbness"; MOVEMENT DISORDER (non-serious) with onset Oct2021, outcome "unknown", described as "She has trouble putting her arm down"; FEELING ABNORMAL (non-serious) with onset Oct2021, outcome "unknown", described as "She can't sleep on that side and after she is just like steroid in her neck and and its going down the left arm"; PAIN (non-serious) with onset Oct2021, outcome "unknown", described as "She is in a lot of pain". The events "peripheral neuropathy", "numbness", "she has trouble putting her arm down", "she can't sleep on that side and after she is just like steroid in her neck and and its going down the left arm" and "she is in a lot of pain" were evaluated at the physician office visit. The patient underwent the following laboratory tests and procedures: investigation: (2021) unknown result. Therapeutic measures were taken as a result of neuropathy peripheral, hypoaesthesia, movement disorder, feeling abnormal, pain included she has been on Cortisone injection as well as Neurontin. Neurontin is of 100 milligrams, three times a day and that's been increased to now 200 milligrams, three times a day and it's not helping. It was reported that Anatomical site of administration: Pharmacist stated, "She had it in her left arm and that's where the issue was now ever since she got the shot she was having like numbness again she went to the physician he said it's peripheral neuropathy. She has trouble putting her arm down. She can't sleep on that side and after she was just like steroid in her neck and its going down the left arm. Doctors increased the Neurontin and that's not helping. She had a cortisone shot (Further clarification unknown hence captured as Unspecified shot) that's not helping. She was in a lot of pain and that's the only thing that's changed. So, she said after just she had the booster shot and then this happened and it's on same side. She was due to go back to her physician tomorrow.  The lot number for bnt162b2 was not provided and will be requested during follow up.; Sender's Comments: Based on the available information in the case, the causal association between the events immunization, neuropathy peripheral and the suspect drug cannot be excluded. The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to regulatory authorities, Ethics Committees, and Investigators, as appropriate.