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.

Read more about side effects on Last.fm.