low sodium blood levels; drinking tomato juice 30 minutes before the injection didn't make her feel tired.; This is a spontaneous report from a contactable consumer.   The 72-year-old female consumer (patient) reported that she received her second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot number: ER8732) via an unspecified route of administration into the right arm on 30Mar2021 (at the age of 72-year-old) as single dose for COVID-19 immunisation. The patient medical history and concomitant medications were not reported. The patient previously received her first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot number: UNKNOWN) via an unspecified route of administration on an unspecified date as single dose for COVID-19 immunisation. On an unspecified date, the patient experienced low sodium blood levels and drinking tomato juice 30 minutes before the injection did not make her feel tired. She was a little tired this morning. She was having the second Covid vaccine and she has low sodium blood levels. Her doctor called her after the first Covid vaccine. Minutes after she felt so tired, she waited 15 minutes and she could not drive the car, she was exhausted. Her Husband drove. This happened on 09Mar2021 it was not until 19Mar2021 that she felt better. 10 days later and a long time. Her doctor called her into the office and they talked about her sodium level being low. It was 136 within normal level and a little above normal. It was a fine result and it was not a fasting test. She ate lunch before the test. States her sodium level may have been low at the time of the injection. She knows tomato juice 5.5 ounces has 470mg Sodium in it. It makes her more alert, like a cup of coffee. She feels when her sodium drops and when her sodium level gets better. She had a hip replacement in June and was in the hospital. Her hip was great and her Orthopedic doctor wanted to let her go but the regular doctor wanted her to stay because of her low sodium. Putting an IV does not help it. She controls it through her diet. Weight is usually between 125 and 127, she weighs 127 today. Her doctor did some research on sodium and the vaccine and could not find anything related to the sodium levels. She drank a can of tomato juice about 5 to 10 minutes before her second dose. She explained to the staff before the injection why she had to wait 30 minutes. Caller believes a pharmacy student gave her the second injection. She felt fine. Her husband had it at the same time as her and they waited after the shot together. She felt fine. She was not tired. She went home and made dinner. She was a little tired this morning and drank tomato juice and felt fine. She used to drink and knows that it has a lot of salt and it made her alert. Her doctor wanted her to try drinking tomato juice prior to getting the second dose so she did. She did not even feel anything on her arm, her arm is not red. Second dose was administered yesterday. Caller got the vaccine because she might get Covid if she did not. She does not care to go out to restaurants and she has not been to the grocery store since 07Mar2020. It was for her own health. Caller added that anything that goes through her Central Nervous System, she will have some sort of reaction, it affects her differently. She went into a surgery the medicine they gave to her went through her and affected the reaction she experienced differently. All she needs is regular Tylenol and Motrin. That's all she needs for pain. She only takes a single. Tylenol because two regular Tylenol puts her to sleep. Her husband asked if she had arm pain and she said maybe if she touched it, but she has a high pain tolerance/threshold. No history of all previous immunization with the pfizer vaccine considered as suspect, no additional vaccines administered on same date of the pfizer suspect. Her father, he did not do well, he would be hypersensitive when it came to medications, her mother was fine. Outcome was unknown for both the events.  No follow-up attempts are possible. No further information is expected.