I took some Tylenol before the vaccine, and my sister later told me that I shouldn’t have. I did some research, and it said there wasn’t much research about how that might affect the covid vaccine. It said that it’s okay to take Tylenol or ibuprofen afterwards but not before. Will Tylenol or any NSAID prevent a person’s body from producing antibodies against the virus? I took the Pfizer vaccine, the first dose. I won’t take any Tylenol for the second vaccine dose, but just curious if I affected the first dose’s efficacy?