There are several bands with the name Side Effects:

1.) Side Effects is a Punk Rock band from Boston, MA, USA that features James Lynch from Dropkick Murphys on guitar.
Members are: Justin Detox: vocals CHAINSAW: axe LYNCH MOB: axe TRIPP: Bass KEV: skins
They released 'Saturday Night Suicide" on Welfare Records in 2005.
http://www.myspace.com/sideeffects


2.) Side Effects is a street punk/anarcho/crust-influenced band from Northern California, residing in the Oakland / Davis areas. Been together since 2008 and have thus far released their first LP "Lessons In Fear" in 2011 as well as a 7'' Flexi titled "The Machine" in 2012 and a second LP, "More To Fear" in 2013.

http://www.facebook.com/sideeffectpunx
http://www.facebook.com/sideeffectpunxrule
http://www.myspace.com/sideeffectpunx

3.) side effects is a psychedelic rock band from Stockholm, Sweden. They debuted in November 2013 with the album A Walk in the Space Between Us.

https://sv-se.facebook.com/sideeffectsofficial