Long COVID
Outcome unclear
Long COVID: NAC made them feel like dying with anxiety and chest pain, then stopped
- Condition
- Long COVID
- At worst
- Not stated
- Ill for
- Not stated
- Last post
- Aug 2026
In their words
- Condition: Long COVID
r/covidlonghaulers
In context ↗
Read from 1 of their posts and comments; links to the one this page draws on
Summary
A Reddit user in a long-COVID community reported that taking 500 mg of NAC a day made them feel like they were dying, with anxiety, a raised heart rate, chest pain, non-stop overthinking, back pain and muscle spasms. They stopped the NAC and said they were back to normal within a week or so.
Ask Miruvor AI
What they tried
Also tried
Their words about each treatment
- Nac · Worse
Nac literally made me feel like I was dying. Anxiety, increased heart rate, chest pain, non stop overthinking, back pain and muscle spasms. Took 500mg a day.
In context ↗
Their path
They say too little about how ill they were at each step to draw it on the severity scale, so the steps are listed as they describe them. Dates are when they posted.
| When | What happened | After |
|---|---|---|
| 2026-08-19 | severe reaction to 500 mg NAC dailyNac literally made me feel like I was dying. Anxiety, increased heart rate, chest pain, non stop overthinking, back pain and muscle spasms.In context ↗ | NAC (N-acetylcysteine) |
| 2026-08-19 | back to normal about a week after stopping NACOnce I stopped nac it got back to normal in a week or so.In context ↗ |
Adverse events
- NAC (N-acetylcysteine)“Nac literally made me feel like I was dying.” In context ↗ Made symptoms worse
- NAC (N-acetylcysteine)“Anxiety, increased heart rate, chest pain, non stop overthinking” In context ↗ Mood or psychiatric effects
- NAC (N-acetylcysteine)“increased heart rate, chest pain” In context ↗ Heart rhythm problems
- NAC (N-acetylcysteine)“back pain and muscle spasms” In context ↗ Side effects
Symptoms mentioned
Their words about their symptoms
- Anxiety & low mood
Anxiety, increased heart rate, chest pain, non stop overthinking
In context ↗ - Heart symptoms & palpitations
increased heart rate, chest pain
In context ↗ - Pain & fibromyalgia
back pain and muscle spasms
In context ↗