u/Dutchlawyer001

Okay, so this is my story. I’m currently on day 9 of dealing with this and trying to understand what happened.

I already have some pre-existing allergies (dust mites, hay fever, cats), but otherwise I had been tolerating supplements very well for months.

For about 2.5 months, I had been taking:

400mg magnesium glycinate nightly

400mg L-theanine nightly

I never had any issues with that combination. In fact, it helped me relax and sleep better.

At some point I ran out of my usual magnesium glycinate, so I bought a different magnesium supplement instead. Around the same time, I also decided to try NAC (N-Acetyl Cysteine) 600mg for the first time ever.

Timeline

April 27 – around 3 PM I took:

NAC 600mg (first time ever)

About an hour later I noticed a very clear effect: my thoughts became much quieter and calmer.

April 27 – evening Before bed I took:

200mg L-theanine

1 tablet of the new magnesium supplement

The new magnesium tablet contained:

Magnesium Bisglycinate: 66.7mg

Magnesium Taurate: 33.3mg

L-Glycine: 50mg

L-Taurine: 50mg

Vitamin B6 (P5P): 0.5mg

So compared to what I had been taking before, I suddenly introduced:

NAC for the first time

a different magnesium form

taurine

extra glycine

P5P/B6

The next morning I woke up feeling extremely dizzy and drowsy, almost like a drunk sensation. Very heavy/lightheaded feeling in my head.

Because of that, I immediately stopped ALL supplements that same day.

What happened afterwards

The intense spinning sensation mostly improved, but the lightheaded feeling remained. Since then I’ve continued feeling:

lightheaded / “floaty” in the head

off-balance

occasional shortness of breath (although this may partly be anxiety)

My doctor checked my blood pressure on the first day and it was normal.

My main question

Could this simply be a temporary nervous system / neurotransmitter imbalance from suddenly changing supplements and introducing NAC all at once?

Again:

I tolerated 400mg magnesium glycinate + 400mg theanine for months without problems.

The only thing that changed was:

switching to a different magnesium formula

adding NAC 600mg for the first time

Since the symptoms started, I stopped everything immediately. Yet now, 9 days later, I still feel lightheaded.

I’m wondering whether the sudden switch may have temporarily disrupted something neurologically or neurochemically, and whether it simply takes time for the nervous system to stabilize again.

My concerns/questions

Does this sound more like a nervous system reaction or something else?

Could 1 pil of NAC trigger something like this in sensitive people?

Could the combination simply have been “too much” for my system at once?

Can a reaction like this cause permanent issues, or is that unlikely?

Has anyone experienced prolonged dizziness/lightheadedness after NAC or changing magnesium supplements?

At this point I honestly don’t know whether:

this was caused mainly by the NAC,

the sudden supplement switch,

or some temporary imbalance that just needs time to settle.

Any thoughts or similar experiences would really help. Thanks in advance.

Oke so this is my story, this is day 7 of my living nightmare;

I am a male 38 years, 170 cm long, weight 100 kg.

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline: April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took L-Theanine (had been taking this for 6 weeks) The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems. So What changed?

I ran out of magnesium Glycinate so I used another mixed pill that contained magnesium Glycinate which contained lower dose. It contained (1 tablet contained): Magnesium Bisglycinate: 66.7mg Magnesium Taurate: 33.3mg L-Glycine: 50mg L-Taurine: 50mg Vitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I stopped all supplements immediately.

Following Days: no spinning feelings but still felt very lightheaded and had some shortness of breath. rest of the days lightheaded.

April 30: Had a massage hoping it would helpt me. Upon standing up, the severe spinning dizziness returned immediately. After a few minutes back to light headed again.

Current Situation: My doctor checked my blood pressure on the day the symptoms started and it was normal.

My Questions: Does this sound like a histamine-related reaction or something else? Did I just messed up my brain with taking to much supplements? NAC 600 mg only took one pil and thats it.

Is it possible for a one-time reaction like this to cause permanent damage?

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just too much for my nervous system to handle. When I was taking 400mg magnesium glycinate and 400 mg theanine at night I didnt experience anything like this now. Maybe the switch from magnesium to the new multitablet and introducing NAC (600mg) the same day was just to much for my system to handle and messed up some balance in my brain? How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance or MCAS? Are my mast cells going haywire. I just don't know anymore.

If anyone have some thoughts please. Thanks in advance.

Just to be clear I only took 1 pil NAC 600mg and the new magnesium tablet I took was also just 1 pill that same day. The day after my nightmare started and i stopped everything. Now after 7 days still light headed and also shortness of breath (although the latter could be anxiety related, my breathing isnt wheezing). I literally cry, it scares the hell out of me. Is this something that's going to correct itself all on its own?

When I was a teenager (16 years old) I had a bad reaction to weed and got derealization/light headedness for like 18 months. It was living hell, I am very scared that I'd trigger something similair. Although I haven't touched a joint ever since (I am 38 now). If anyone, has similiar experience, advice, or anything please. I have a daughter and a wife and I barely manage to be happy around them because of this. It's really breaking me. Sorry for the trauma dump, but I can really use some help. Thank you.

Oke so this is my story, this is day 7 of my living nightmare; 6 weeks ago I got my diagnoses because of a burn-out got tested. Because of the burn out I had been taking some supplements.

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline: April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took L-Theanine (had been taking this for 6 weeks) The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems. So What changed?

I ran out of magnesium Glycinate so I used another mixed pill that contained magnesium Glycinate which contained lower dose. It contained (1 tablet contained): Magnesium Bisglycinate: 66.7mg Magnesium Taurate: 33.3mg L-Glycine: 50mg L-Taurine: 50mg Vitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I stopped all supplements immediately.

Following Days: no spinning feelings but still felt very lightheaded and had some shortness of breath. rest of the days lightheaded.

April 30: Had a massage hoping it would helpt me. Upon standing up, the severe spinning dizziness returned immediately. After a few minutes back to light headed again.

Current Situation: My doctor checked my blood pressure on the day the symptoms started and it was normal.

My Questions: Does this sound like a histamine-related reaction or something else? Did I just messed up my brain with taking to much supplements? NAC 600 mg only took one pil and thats it.

Is it possible for a one-time reaction like this to cause permanent damage?

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just too much for my nervous system to handle. When I was taking 400mg magnesium glycinate and 400 mg thesnine at night I didnt experience anything like this now. Maybe the switch from magnesium to the new multitablet and introducing NAC (600mg) the same day was just to much for my system to handle and messed up aome balance in my brain? How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance or MCAS? Are my mast cells going haywire. I just don't know anymore.

If anyone have some thoughts please. Thanks in advance.

Just to be clear I only took 1 pil NAC 600mg and the new magnesium tablet I took was also just 1 day. The day after my nightmare started and i stopped everything. Now after 7 days still light headed and also shortness of breath (although the latter could be anxiety related, my breathing isnt wheezing). I literally cry, it scares the hell out of me. Is this something that's going to correct itself all on its own?

When I was a teenager (16 years old) I had a bad reaction to weed and got derealization/light headedness for like 18 months. It was living hell, I am very scared that I'd trigger something similair. Although I haven't touched a joint ever since (I am 38 now). If anyone, has similiar experience, advice, or anything please. I have a daughter and a wife and I barely manage to be happy around them because of this. It's really breaking me. Sorry for the trauma dump, but I can really use some help. Thank you.

Oke so this is my story, this is day 7 of my living nightmare;

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline: April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took L-Theanine (had been taking this for 6 weeks) The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems. So What changed?

I ran out of magnesium Glycinate so I used another mixed pill that contained magnesium Glycinate which contained lower dose. It contained (1 tablet contained): Magnesium Bisglycinate: 66.7mg Magnesium Taurate: 33.3mg L-Glycine: 50mg L-Taurine: 50mg Vitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I stopped all supplements immediately.

Following Days: no spinning feelings but still felt very lightheaded and had some shortness of breath. rest of the days lightheaded.

April 30: Had a massage hoping it would helpt me. Upon standing up, the severe spinning dizziness returned immediately. After a few minutes back to light headed again.

Current Situation: My doctor checked my blood pressure on the day the symptoms started and it was normal.

My Questions: Does this sound like a histamine-related reaction or something else? Did I just messed up my brain with taking to much supplements? NAC 600 mg only took one pil and thats it.

Is it possible for a one-time reaction like this to cause permanent damage?

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just too much for my nervous system to handle. When I was taking 400mg magnesium glycinate and 400 mg thesnine at night I didnt experience anything like this now. Maybe the switch from magnesium to the new multitablet and introducing NAC (600mg) the same day was just to much for my system to handle and messed up aome balance in my brain? How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance or MCAS? Are my mast cells going haywire. I just don't know anymore.

If anyone have some thoughts please. Thanks in advance.

Just to be clear I only took 1 pil NAC 600mg and the new magnesium tablet I took was also just 1 day. The day after my nightmare started and i stopped everything. Now after 7 days still light headed and also shortness of breath (although the latter could be anxiety related, my breathing isnt wheezing). I literally cry, it scares the hell out of me. Is this something that's going to correct itself all on its own?

When I was a teenager (16 years old) I had a bad reaction to weed and got derealization/light headedness for like 18 months. It was living hell, I am very scared that I'd trigger something similair. Although I haven't touched a joint ever since (I am 38 now). If anyone, has similiar experience, advice, or anything please. I have a daughter and a wife and I barely manage to be happy around them because of this. It's really breaking me. Sorry for the trauma dump, but I can really use some help. Thank you.

Oke so this is my story, this is day 7 of my living nightmare;

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline:

April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took 200mg L-Theanine (had been taking this for 4 weeks) and 1 tablet of a new Magnesium complex (see ingredients below). The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems. But since I ran out I tried a new magnesium tablet which contained lower dose. It contained (1 tablet contained): Magnesium Bisglycinate: 66.7mg Magnesium Taurate: 33.3mg L-Glycine: 50mg L-Taurine: 50mg Vitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I stopped all supplements immediately.

Following Days: no spinning feelings but still felt very lightheaded and had some shortness of breath.

April 30: Had a massage. Upon standing up, the severe spinning dizziness returned immediately. After a few minutes back to light headed again.

Current Situation: My doctor checked my blood pressure on the day the symptoms started and it was normal.

My Questions: Does this sound like a histamine-related reaction or something else?

Is it advisable to take an antihistamine like Cetirizine or Meclizine/cinnerazine (for the vertigo)?

Is it possible for a one-time reaction like this to cause permanent damage?

When I was younger about 10 years ago I did experience similar vertigo issues although it was temporary.

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just too much for my nervous system to handle. When I was taking 400mg magnesium glycinate and 400 mg thesnine at night I didnt experience anything like this now. Maybe the switch from magnesium to the new multitablet and introducing NAC (600mg) the same day was just to much for my system to handle and messed up aome balance in my brain? How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance or MCAS? Are my mast cells going haywire. I just don't know anymore.

If anyone have some thoughts please. Thanks in advance.

Just to be clear I only took 1 pil NAC 600mg and the new magnesium tablet I took was also just 1 day. The day after my nightmare started and i stopped everything. Now after 7 days still dizzy and also shortness of breath (although the latter could be anxiety related, my breathing isnt wheezing).

I've also added photos of the pills where I switching to the new magnesium pil and NAC (although day after I got dizzy/lightheaded and stopped everyhting)

Hi everyone, I’m looking for some insight into a scary reaction I had recently.

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline:April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took 200mg L-Theanine (had been taking this for 4 weeks) and 1 tablet of a new Magnesium complex (see ingredients below). The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems But since I ran out I tried a new magnesium tablet which contained lower dose. It contained (1 tablet contained):Magnesium Bisglycinate: 66.7mgMagnesium Taurate: 33.3mgL-Glycine: 50mgL-Taurine: 50mgVitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I also experienced brief nystagmus (involuntary eye movements). I stopped all supplements immediately.

Following Days: Gradual improvement, but still felt lightheaded and had some shortness of breath. April 30: Had a massage. Upon standing up, the severe dizziness returned immediately. Current Situation:My doctor checked my blood pressure on the day the symptoms started and it was normal. I suspect this might be a severe histamine reaction because I’ve read NAC can trigger mast cells, and I already have a high "histamine bucket" due to my allergies.My Questions:Does this sound like a histamine-related reaction or something else? Could the massage have triggered a relapse due to blood pressure drops or vestibular issues (like BPPV)? I am considering taking an antihistamine like Cetirizine or Meclizine (for the vertigo). Is this advisable?Is it possible for a one-time reaction like this to cause permanent damage to the nervous system or inner ear? (I am quite anxious about this). When I was younger about 10 years ago I did experience similiar vertigo issues although it was temporary. I would appreciate any thoughts or similar experiences.

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just to much for my nervous system to handle. How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance? Are my mastcells going haywire. I just don't know anymore. If anyone have some thoughts please. Thanks in advance.

Hi everyone, I’m looking for some insight into a scary reaction I had recently.

I’m a person with pre-existing allergies (dust mites, hay fever, cats).

The Timeline:April 27, 3:00 PM: Took 600mg NAC (first time ever). After I took it an hour or so later felt immediate effect. My thoughts were quieter.

April 27, Evening: Took 200mg L-Theanine (had been taking this for 4 weeks) and 1 tablet of a new Magnesium complex (see ingredients below). The previous 6 weeks I was taking 400mg Magnesium glycinate and 400mg theanine. With zero problems But since I ran out I tried a new magnesium tablet which contained lower dose. It contained (1 tablet contained):Magnesium Bisglycinate: 66.7mgMagnesium Taurate: 33.3mgL-Glycine: 50mgL-Taurine: 50mgVitamin B6 (P5P): 0.5mg

Next Morning: Woke up extremely dizzy, feeling "drunk." I also experienced brief nystagmus (involuntary eye movements). I stopped all supplements immediately.

Following Days: Gradual improvement, but still felt lightheaded and had some shortness of breath. April 30: Had a massage. Upon standing up, the severe dizziness returned immediately. Current Situation:My doctor checked my blood pressure on the day the symptoms started and it was normal. I suspect this might be a severe histamine reaction because I’ve read NAC can trigger mast cells, and I already have a high "histamine bucket" due to my allergies.My Questions:Does this sound like a histamine-related reaction or something else? Could the massage have triggered a relapse due to blood pressure drops or vestibular issues (like BPPV)? I am considering taking an antihistamine like Cetirizine or Meclizine (for the vertigo). Is this advisable?Is it possible for a one-time reaction like this to cause permanent damage to the nervous system or inner ear? (I am quite anxious about this). When I was younger about 10 years ago I did experience similiar vertigo issues although it was temporary. I would appreciate any thoughts or similar experiences.

I just don't know what to do, is what I did irreversible? Is it because a bad reaction to the NAC or were the combination of pills just to much for my nervous system to handle. How to move forward? My doctor just shrugs his shoulders. Could one pill of NAC cause permanent histamine intolerance? Are my mastcells going haywire. I just don't know anymore. If anyone have some thoughts please. Thanks in advance.