There are two groups that have used the name Negative Reaction. One is an Australian experimental group that made music in the early 80s. The other is a sludge/doom metal band.

The sludge/doom metal group's biography:
Ken-E Bones - Vocals, Guitars (Orange 120 OD Feedback), Native American Flute
The Neil - Drums
Capt'n Manny - Bass

Negative Reaction is a part of the Sludge/Doom metal scene. NR uses feedback as a hammer and the guitars tuned to A as the stake. Don't be alarmed though, this band writes songs with feeling and heart to match creativity and give the listener one hell of a time. They can tear through a fast number as well as a slow one, which will make you think you're listening to a combination of Grief, Black Sabbath and Napalm Death. Negative Reaction released their first seven inch in 1993 and are still going strong.

DISCOGRAPHY (from website http://www.negativereaction.info )

1993
We Got Problems (7” split with Sound Bite House)

1993
Poisoned Friendship (7” split with Whatsoever)

1995
Sludge (7” split with Violent Society)

1996
More Lies From the Underground (CD Comp)

1996
endofyorerror (CD)

1998
The Orbit EP (7”)

1999
He’s No Good To Me Dead (CD Comp) (Game Two Records)

2000
The Orion Chronicles (CD)

2003
Destroysall (CD Comp)

2003
Everything You Need For Galactic Battle Adventures (CD)

2004
Negative Reaction/Ramesses Split (CD)

2006
Under the Ancient Penalty (Dark Reign/ Devildoll Records)