I have never heard of Klonopin containing aspartame, but I am not certain that it doesn't either...I suppose it might be part of the compounding filler...?
You could call your pharmacist for the best answer to this question.
I hope you get the answers you seek...and relief from your headaches soon.
"Courage is not the abscence of fear, it is feeling afraid and doing it anyway!"
"Worrying does not empty tomorrow of its troubles...it empties today of its strength."
Corrie Ten Boom
Panic Syndrome recovery due to CBT