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NAC User Reviews & Ratings

NAC has an average rating of 5.9 out of 10 from a total of 9 reviews on Drugs.com. 55% of reviewers reported a positive experience, while 27% reported a negative experience.

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Dietary Supplementation  
5.9
 9 reviews for Dietary Supplementation 704 medications
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Reviews for NAC

  • Cat-L...
  • Taken for 1 to 6 months
  • March 4, 2023

For Dietary Supplementation "I'm female, mid-30's. Started taking this when I had COVID as I am prone to developing ARDS. I read that NAC can help boost immunity and repress inflammatory overreaction. I did not develop ARDS. I can't say for certain that the NAC prevented it. I will say, however, that wheezing and chest tightness stopped, fever went down, and I began to recover within 24 hours of starting the NAC. I stopped taking it for a while. Later I started taking daily for 4-6 months. Stopped recently due to medical issues. Results: 1) (neutral) At last 2 med checkups BP was 95/66 and 106/60 (usual 125/80) 2) (negative) Started having severe palpitations, iron deficiency worsened, odd results on metabolic panel. 3) (positive) I did not catch stomach flu or colds that others in my home had"

7 / 10
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25 Report
  • Anonymous
  • Taken for less than 1 month
  • September 5, 2022

For Dietary Supplementation "Gave me bad acid reflux, coughing and I later found out it exacerbates asthma, had me so sick. Will never take again. Also read online NAC exacerbated tumor growth in lung cancer and melanoma. It may help some, but if you gave asthma be cautious. Wish I read before taking. Don't let the good reviews fool you."

2 / 10
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28 Report
  • Elise
  • Taken for less than 1 month
  • September 23, 2023

For Dietary Supplementation "I've now been taking NAC 650 mg in the evening for 2 weeks. I suffer from chronic depression and generalized anxiety. It helps to stabilize my mood and it definitely helps with anxiety. I thought I should perhaps take a small break and yesterday I skipped the pill. I woke up feeling quite sad and in couple of hours the anxiety started to get stronger. I gave up the idea of a break and took one NAC pill right away. After a while I felt a lot lighter. What surprised me is that my singing voice suddenly improved a lot. I have suffered from voice issues. I think NAC helps with acid reflux, lungs and mucous membranes. Also anxiety and stress relief helps. I hope this doesn't wear off, as all the other supplements have done, so far."

9 / 10
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8 Report

Frequently asked questions

  • richard
  • Taken for 6 months to 1 year
  • August 16, 2022

For Dietary Supplementation "I take this for COPD I am wheezing constantly after regular use of NAC cysteine, it helps a little reducing mucus, but creating a difficulty in breathing and wheezing daily . whereas this did not happen before taking this drug , l revert back to MSM powder with vitamin C liquid and feel better ."

3 / 10
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15 Report
  • fourt...
  • Taken for 1 to 6 months
  • August 21, 2023

"This is the best. I had breathing issues, always winded, couldn't walk up stairs without losing my breath. They were going to put me on an inhaler. They all cost $300.00 and up. So my lung specialist told me to try this. Oh my god, it was amazing! My breathing started to get back to normal, I felt great, and I didn't sit around. I started to exercise cardio again for 1 hour. I started losing weight, my breathing got better, my coughing stopped, and my depression left. I felt so happy, everything that was wrong went away. I'm so active again, and I'm not winded. I will continue to take this. This is my miracle drug. I'm so happy I can walk my dog 4 miles again. I do everything I used to do. I am me again. Thank you. I saw bad reviews. Maybe it doesn't work for all, but it sure did for me. It took a while, but I could feel my breathing slowly getting better."

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8 Report

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  • happy...
  • Taken for 2 to 5 years
  • March 26, 2023

"In my late 70's I had Atrial fibrillation (A-fib) daily for a year or two. I tried NAC, and starting the next day I had not one episode of A-fib. I have been taking NAC (specifically Swanson N-Acetyl-L Cysteine) every day for over two years with mostly positive results against A-fib. I still occasionally have a bout of it, mostly mild and short-lived. No negatives to report."

10 / 10
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8 Report
  • Femal...
  • Taken for 2 to 5 years
  • October 14, 2022

For Dietary Supplementation "I've taken it off and on for a few years, for its antioxidant effects initially, and the past couple years for lung support, as my asthma tries to blossom into COPD. I take 600mg once daily. Seems to help, doesn't hurt, with one exception. If I take it daily more than a couple weeks, it aggravates a pain in my left calf that is also aggravated by consuming generous amounts of smoked meat (yes, really.) My doc has no idea what's up with any of this, but isn't worried. My present hypothesis is nitrogen sticking with endothelial tissue in a vein. Oh, ageing is SUCH fun!"

8 / 10
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9 Report
  • NancyM
  • Taken for 6 months to 1 year
  • March 26, 2018

"I' ve been taking 1800 mg/day of acetylcysteine for CFS (Chronic fatigue syndrome) or myalgic encephalomyelitis (ME) symptoms and it is the single best supplement I’ve found. Dosage based on CFS study. Half life is only 3 hours, so timed release is most helpful, tho more expensive and only one brand available at this time."

9 / 10
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21 Report
  • Rose
  • Taken for less than 1 month
  • February 20, 2024

For Dietary Supplementation "I had taken NAC a few years ago to help repair damage in my body caused by taking the very strong antibiotic cipro. It helped to restore cell damage and I tolerated it well. With the flu hitting close to home, I decided to take it again as a prevention, but within a few days I started having terrible acid reflux and just a feeling of unwellness."

5 / 10
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2 Report
  • bill
  • Taken for 6 months to 1 year
  • January 5, 2024

For Dietary Supplementation "Used NAC with quercetin to reduce COVID symptoms. It definitely helped since I took blood thinners and was unable to have the recommended shot. No negative side effects, 600 mg twice a day. It does smell terrible."

9 / 10
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0 Report
  • sofi_...
  • Taken for 1 to 6 months
  • January 12, 2024

For Dietary Supplementation "I wanted to share my experience with using NAC as part of my approach to managing high cholesterol. After researching potential solutions, I incorporated Nutraharmony's NAC into my routine. I've been taking NAC for a while now, and it seems to be contributing positively to my cholesterol management journey. While it's not a one-size-fits-all solution, I've noticed some improvements. So, I will continue to monitor my results."

9 / 10
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  • Anonymous
  • Taken for less than 1 month
  • July 28, 2022

For Dietary Supplementation "Coughing fits and still coughing 7 days later after taking this. I don't recommend and wish I never took this. :("

1 / 10
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19 Report

Reviews may be edited to correct grammar/spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest are not published. This information is not intended to endorse any particular medication. While these reviews may be helpful, they are not a substitute for the expertise, knowledge, and judgement of healthcare professionals.