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And the doctor who prescribed it would refute the lack of data, saying the absence of evidence is not evidence of absence, and that his patients are deriving substantial benefit without side effects

Many people seem to experience symptoms like those you mention - where it has been mentioned in posts my memory is that the individuals concerned report the sleepiness as something that continues as they move into maintenance shots

Mild signs of hypersensitivity: itching or rash

Helaakoski V et al