No, it’s a supplement you can buy OTC. It’s $10 for 100 pills (so 50 days). Here’s what I bought but there are many brands: Swanson NAC N-Acetyl Cysteine https://www.amazon.com/dp/B07F92YLRW?ref=ppx_pop_mob_ap_share
I used Swanson and it's just as good as the NOW I'm on now.