I am experiencing swelling feet and hands. Is that the Spectral DNC side effect?

Spectral DNC is a medication containing 5% Minoxidil and Aminexil SP94. Most of the side effects in Spectral DNC are due to the use of Minoxidil 5% and are very similar to side effects reported by users of regular Minoxidil containing medications. In some people this can be a simple irritation, in others it can be an allergic reaction.
In your case, experiencing sudden swelling of the hands and feet indicates that you should stop using Spectral DNC and consult your doctor.

The swelling of hands and feet when taking any medication is a sign of allergy to the medications and it should be stopped