What is N-Acetylcysteine NAC?

Category: Supplements

Most popular types: GNC N-Acetyl Cysteine ACC 600 Fluimucil Show all

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See also: Acetylcysteine R+ lipoic acid and NAC SR

N-acetyl cysteine (NAC) is an altered form of the amino acid cysteine, which is commonly found in food and synthesized by the body. It is used as a mucolytic, any agent that dissolves thick mucus, to correct abnormally low glutathione levels, and for paracetamol/acetaminophen overdoses.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Idiopathic pulmonary fibrosis 136 44
Amyotrophic lateral sclerosis 59 24
General health 34 14
Parkinson's disease 15 9
Support immune health 10 0

Show all 72 reasons taken


  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations
Severe 6
Moderate 2
Mild 8
None 108

Commonly reported side effects and conditions associated with N-Acetylcysteine NAC

Side effect Patients
Nausea 3
Acid reflux 1
Decreased respiratory function 1
Diarrhea 1
Excessive gas 1
Excess mucus 1

Show all 21 reported side effects

Dosages

Based on patients currently taking N-Acetylcysteine NAC

Dosage Patients
600 mg daily 13
600 mg twice daily 8
1,200 mg daily 6
600 mg three times daily 6
500 mg daily 4
3 capsule(s) daily 3
1,800 mg daily 3
2 mg daily 2
3 tablet(s) daily 2
1 mg weekly 1

See all 35 dosages

Why patients stopped taking N-Acetylcysteine NAC

Multiple reasons could be selected

Reason Patients
Other 33
Did not seem to work 31
Doctor's advice 21
Course of treatment ended 10
Side effects too severe 10
Expense 8
Personal research 6
See all 95 patients who've stopped taking N-Acetylcysteine NAC

Duration

Currently taking N-Acetylcysteine NAC

Duration Patients
1 - 6 months 6
6 months - 1 year 7
1 - 2 years 8
2 - 5 years 29
5 - 10 years 18
10 years or more 5

Stopped taking N-Acetylcysteine NAC

Duration Patients
Less than 1 month 11
1 - 6 months 22
6 months - 1 year 21
1 - 2 years 21
2 - 5 years 18
5 - 10 years 4
Adherence
Adherence Evaluations
Always 83
Usually 23
Sometimes 9
Never taken as prescribed 9
Burden
Burden Evaluations
Very hard to take 1
Somewhat hard to take 7
A little hard to take 24
Not at all hard to take 92
Cost per month
Cost per month Evaluations
$200+ 0
$100-199 1
$50-99 3
$25-49 18
< $25 47
Not specified 55
Last updated:

16 patient evaluations for N-Acetylcysteine NAC

Dec 2, 2016 (Started Nov 12, 2016)

  • Effectiveness
    None (for myalgic encephalomyelitis/chronic fatigue syndrome)
  • Side effects
    Severe (sleepiness, overwhelming fatigue)
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 600 mg Daily
Advice & Tips: Got more and more fatigued. It crept up on me, so took me a good while to realize it was the NAC causing it. Already housebound, but became more or less bedbound within three-four weeks. The last week before I realized the culprit I slept for a whole week and could not take on anything. Awake for only hours at a time. Got back to normal within two days after I stopped. Same reaction as when I tried MSM but slower/less obvious.

  • 0 helpful marks

Jun 19, 2016 (Started Nov 15, 2015)

  • Effectiveness
    Can’t tell (for amyotrophic lateral sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    A little hard to take
Dosage: 600 mg Twice daily

  • 0 helpful marks

Nov 1, 2015 (Started Jun 01, 2008)

  • Effectiveness
    None (for Support brain health)
  • Effectiveness
    None (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: 500 mg Daily
Cost: < $25 monthly

Feb 15, 2012 (Started Jun 01, 2008)

  • Effectiveness
    Can’t tell (for Neuroprotection)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    A little hard to take
Dosage: 600 mg Daily
Cost: < $25 monthly

  • 0 helpful marks
Last updated:
Showing 3 of 16 patient evaluations for N-Acetylcysteine NAC