I am very confused; These medications that I am taking, react to the Pfizer injection and I think I might have side effects; This is a spontaneous report from a contactable consumer (patient). A 58-year-old male patient received bnt162b2 (Pfizer, Batch/Lot number was not reported), first dose via an unspecified route of administration in Mar2021 as single dose, second dose via an unspecified route of administration in Mar2021 as single dose for covid-19 immunization. The patient's medical history was not reported. The patient received unspecified concomitant medications. The patient experienced very confused in 2021, these medications that he was taking, react to the Pfizer injection in 2021. Consumer stated, "I don't know I have a question I had taken my like two Pfizer vaccination (Covid-19 Vaccine) in Mar at withheld, I am at high risk 58 year old male, who is disabled and I have trouble with some medical conditions and I take many medications so, of course at that time Pfizer could not identified when I called many of my home medications that they related to my Covid vaccination at the time. A week and half ago the same hospital contacted me and they said because there I am high risk of Covid in withheld and it is very dangerous and they would called me in to take the what they have considered the 3rd vaccination so, I went there and ask them can you explain the difference between explain between a booster vaccination and the vaccination is given me from Pfizer and they said well they will not called me for booster vaccination because the booster vaccination is still being for reviewed for approval so, I was on under the impression of  was getting the dual fuel kit of the second vaccination but only four months later it said that waiting for 8 months later so, I called only they people called for highly emergencies related with regards the high auto immune deficiencies so, I had the vaccination and then in this week it collaborates that your booster shot vaccination has been proved by the FDA. I don't know if that the same vaccination that I had received last week or it's a different contained to the different formula to fight the new variant that are coming in the future." When probed the name of vaccine (Covid-19 Vaccine), Consumer stated, "Yes, I explain to you that I received the two Covid vaccine four months ago then why you asking me if it is about the Covid vaccination. Okay so, I am not going to talk anymore. I am very confused. The hospital did not understand what injection they gave me instead I have to come back for the fourth shot a booster and I do not understand what is going on and I just don't understand what is just being approved and if it is different than the vaccination that I took last week." Consumer stated, "I tried googling it but it is very confusing I just thought maybe you might be familiar with only because you work for Pfizer and probably, I am getting the 3rd injection. So, I just go based on the personal experience with Pfizer you have little bit inside what you believe is true about the vaccination because you are a Pfizer employee and you read everything, you had new letters and have access to everything." Consumer stated, "I don't know how these medications (Unspecified Medication) that I am taking react to the Pfizer injection and I think I might have side effects so, if I will give you the names all that I am taking, can you look it up and tell me is that is the side effects is associated with that." The outcome of events was unknown.   The lot number for the vaccine, BNT162B2, was not provided and will be requested during follow up.