ADHD sufferer here. I hate nicotine so much. Withdrawal brought me to the emergency room.

I've been using nicotine for about 20 years—so I'm already not a smoker, but an extreme nicotine addict. Pouches, snuff, gums, e-cigarettes. The more, the better.

My whole life I didn't realize that I have ADHD—and thus needing medical help. So I always used high doses of nicotine to force my brain to concentrate. Concentrating has always been the hardest thing for me. If I'm not extremely interested in something, it's absolutely impossible without nicotine, no matter how hard I try.

When I was getting older I realized that this would constantly push my heart rate to about 100. When I was sleeping I had 70—this can't be healthy in the long run.

So my decision was clear: I need to stop with nicotine.

The first time I seriously tried (and didn't already give up after 1 or 2 days), it worked for two months. The withdrawal only lasted about a week, and the symptoms were negligible. But then I started again, because I wasn't able to work any more, I just couldn't concentrate.

So I tried it again for two weeks, failed again. Lowered my nicotine consumption, sometimes using no nicotine for the whole day but only in the evening. This is when all started.

After taking my meal which is typically when the body expects nicotine I got a tachykardia and ended up in the emergency room. I then stopped nicotine for more than two months.

The withdrawal symptoms I had were the biggest nightmare I ever had:

• High blood pressure (up to 168/97).
• Constant dizziness.
• Often I had nausea.
• Anxiety, shame and sadness.
• Inability to concentrate on anything.
• Heart palpitations (also tachycardia after eating).
• Unable to eat normally. I would have constipation and diarrhea at the same time.
• Tingling in the arms and legs.
• Stinging in the head.
• Suddenly, my calf was swollen for several days and I couldn't walk properly anymore. I never had a swollen calf. I thought I had thrombosis, but after the examination it turned out that everything was fine. They found a Baker's cyst.

These physical reactions were so strong that, from my subjective point of view, I didn't feel like I was suffering from withdrawal at all, but simply that my body was giving up and that I would soon die.

I had the tachycardia (which brought me to the emergency room) always only after eating, even two months after I stopped with nicotine. Once I even woke up in the middle of the night, trembling (shivering attack), and had to empty everything (from the gut) in the toilet for some inexplicable reason.

The first month was the worst. After about a month it became better and better.

About three months later I became really anxious about my financial situation, because I was unable to work, unable to concentrate without nicotine due to my ADHD. So I tried nicotine—only snuff—and a day later, of course again after eating, I had a tachycardia. My body again started to become crazy. I immediately disposed the snuff can.

I really don't know what's wrong with my body. It's like nicotine crashed my whole nervous system. From a scientific point of view, it would be very interesting to know what is going on here.

In any case, I hate nicotine so much. It's so disgusting. It really damages your entire nervous system and drives you crazy, with or without.