N-acetylcysteine question

Hi there! I’ve been taking n acetylcysteine for about 2 weeks now every day for compulsively picking the skin around my fingers. I’ve been doing this for about 15 years now. I haven’t noticed any difference since starting, if anything, seems to have gotten worse. Two 750 mg capsules daily in the evening.

Should I continue on or will this just not work for me unfortunately // switch dosage?

Thank you in advance!