Let’s start with the ones cited by Merck:
fever, nausea, pharyngitis, dizziness, NVD, bronchospasm and Gastroenteritis, appendicitis, PID, upper respiratory infection
Then the British media began to report still other effects of Gardasil, like the deaths of 30 young girls, which American media never mentioned. 
A frequent consequence of the HPV shot is Guillain Barre syndrome, an autoimmune condition resulting in paralysis. There have been several such cases both in the UK and the US, including a high profile case in Oct 2008 of a 12 year old British girl who collapsed 2 days after the HPV shot and was subsequently paralyzed from the waist down.  Her first symptoms came on within 30 minutes. Again, no US media.
Newer 2012 intel from the VAERS database – the government tracking system for vaccine injuries since 1991 – this data makes public the 26 American girls who died from the Gardasil shot in 2011.  The story has never been in any mainstream media source. But you can easily find these government documents , although scrolling through them to find the 26 deaths will require that you do a search for the word death.
Diligent research came from Judicial Watch, a group that recently unearthed the data through Freedom of Information. 
In the US and UK combined more than 100 girls died from the HPV vaccine between 2010 and 2012. See that anywhere on FOX News?
Can the vaccine itself cause cancer? That’s a fair question – we’re talking about a vaccine that they’re claiming prevents cancer by imitating a pathogen that itself causes cancer, right? So wouldn’t we want to be fairly secure that this vaccine wouldn’t cause cancer? Here’s what the manufacturer states:
Wonderful. They want to vaccinate all American 12 year olds with a new vaccine for cancer and they don’t even know whether or not it causes cancer, or makes the recipients infertile.
HPV VACCINE PROJECTED PROFITS
Again, the whole story of HPV vaccine is much more invidious than we’re representing here. For those readers seeking the real extent of the science behind the HPV vaccine industry, the IARC Monographs is your ticket.  The vigilant reader is also invited to follow up these sources: , , 
Rarely has such a calculated, systematic misrepresentation of fact been attempted in which data is so obviously manipulated, issues so deliberately obscured, and financial interests so obsequiously served.
With the uncertainty about the safety and efficacy of the HPV vaccine, the certainty of the side effects, the prodigious economic upside to global dissemination irrespective of its scientific merits, the absence of long-term studies, and the ludicrous religious/ethical/equality media controversy smokescreen designed to distract us from the underlying scientific issues, is this really a vaccine you want to try out on your innocent little 9 yr old? Source