I undersøgelserne var de mest almindelige bivirkninger ved Gardasil (forekom hos mere end 1 ud af 10) pyreksi (feber) og reaktioner på injektionsstedet (rødmen, smerter, hævelse).
In studies, the most common side effects with Gardasil (seen in more than 1 patient in 10) were pyrexia (fever) and reactions at the site of the injection (redness, pain and swelling).