The effects of medications on plants? (Furacyn)

Hello all,

I was wondering if any of you had a store of knowledge regarding
interaction between plants and common aquaria medications. 

My fiance had a body slime infection on some fish in a planted tank.  
After checking for copper, she chose Furacyn by Aquatronics.  Now, her 
plants look awful.  Is this a known reaction?

The ingredients are listed as '100 mg Capsules of Water Soluble 
Nitrofurazone Activity'

Christopher L. Weeks            |Are the opinions expressed herein 
                                |those of my employer?
Training Specialist &           | 
Graduate Computing Consultant   |Maybe, maybe not...
University of Missouri-Columbia |
Campus Computing                |
200 Heinkel Building            |well...probably not.