Most definitely. See the orange-brown fumes? They are all sorts of nitrogen oxides which do a jolly good job of oxidizing lungs when inhaled. And apparently there have been several nasty accidents since it is necessary to empty and refuel rockets at regular intervals.
At least they don't do much of environmental damage once they are done oxidizing.

Nitric tetroxide is the best reason for solid fuel rockets.

Edit: Having fluoric acid listed as "inhibitor" should be a sure sign to STAY AWAY from this.