L-theanine and Tiredness: What Users Say

• lif...
• Taken for less than 1 month
• September 24, 2020

For Dietary Supplementation "I write this as I was searching for adverse effects from l-theanine. Well, lo and behold, I see others on there have also experienced dizziness and strange symptoms. I currently take 1 mg of Klonopin and 50 mg of Zoloft daily. I decided to try 200 mg of l-theanine last night. My hands are still shaky as I type this almost 24 hours later. I was unable to leave my house today due to dizziness, exhaustion, depression, and anxiety. When I woke up last night to go to the bathroom, I felt like the room was spinning, and I awoke from a coma. I can only conclude that the l-theanine reduced my blood pressure to near zero. There were no indications that I could not take it with the medications I am on. Well, guess what? IT HAD A VERY BAD ONE! Those of you on medications, be very cautious!"

• mes...
• Taken for 2 to 5 years
• January 20, 2017

For Dietary Supplementation "This works on my dog's anxiety, my anxiety, and my college son's anxiety. We all get relief within 15 minutes of taking this. I actually found it originally from my vet (expensive anti-anxiety dog pill ingredients: L-theanine and meat flavoring). I keep buying tablets in the large foil bag on eBay (the ones for humans, not dogs!). It is better than an anti-anxiety pill as there is no exhaustion or other side effects, just a calming feeling that allows you to relax a bit and think. I buy a huge bag and that makes it cheap. The capsule form is more expensive."

• Bet...
• April 22, 2020

For Dietary Supplementation "I took this supplement this morning on the way to work. By the time I got to work, I felt a little tired and dizzy. Within an hour, I became so nauseous and dizzy, and my head felt tight, and my neck got stiff, and my arms started to feel weak, and I got a little confused when trying to talk. I had to leave and go home. I still feel all of those things. I will not be taking this supplement again."

• NYg...
• Taken for less than 1 month
• August 26, 2018

For Dietary Supplementation "The first time I took 100 mg of L-Theanine, it made me feel spacey, tired, and gave me a headache. It did calm me down, I felt my dopamine level rise, but the overall feeling was somewhat uncomfortable. A lot of sources recommend having coffee with it. I loved the combination. It made me feel happy, motivated, and energetic, but that didn’t last long. In 5 hours, I started to have a bad crash. I had jitters all over my body, and my heart rate was very high. I took 50 mg of L-Theanine to calm down, but it didn’t feel the same the second time, not the same mood, and I felt cranky, but it relaxed me. Since I don’t feel right after a calm down, I take 5-HTP after. I also pair L-Theanine with 5-HTP for sleep and have happy dreams, sleep, and wake up with a smile. I recommend that combination for people who suffer from depression. For those who suffer from anxiety, don’t have it with coffee and be careful with it, calm downs can be pleasant. Could be the brand too, get a quality brand."

• swi...
• Taken for less than 1 month
• August 2, 2021

For Dietary Supplementation "I felt so spaced out, couldn't really work. I got focused on doing all kinds of things I've wanted to do for a long time, but not work. I couldn't calm down in the evening, had this urge to get stuff done, organize things, etc., very unpleasant. Somehow made me a little bit calm, but mostly way too over the place to get anything done sensibly. Now I feel exhausted after a few days of it, feel as if I'd have been on drugs for a few days."