L-theanine and Nausea: What Users Say

• cla...
• Taken for 1 to 6 months
• May 14, 2021

For Dietary Supplementation "I am a 52-year-old average size (5'10', 180 lbs) male. I suffer from severe depression, anxiety with panic attacks, and agoraphobia. Medications given by my psychiatrist only stabilize me to be functional. THEN I found L-Theanine. When my anxiety begins rising toward a panic attack (throwing my mood deeper into depression), I take 200mg of L-Theanine. Within 45 minutes, I just notice 'hey, no panic attack yet' and 'I feel so calm.' If I still feel a bit anxious after 45 minutes, I take another 200mg. I take 200mg before I leave my home. It doesn't make me tired but does give me a relaxed sleep. The only side effects I have noticed are sometimes a slight headache and moderate nausea if I take on an empty stomach. I prefer it over Rx meds to avoid the dizziness and chance of addiction. L-Theanine has dramatically improved my quality of life. It is my lifesaver!"

• Ang...
• Taken for less than 1 month
• October 24, 2020

For Dietary Supplementation "I tried just one pill last night and shortly after felt really relaxed, like that feeling when you’re about to fall asleep. Then my heart was beating closer to 125 bpm for at least an hour or more. I felt dizzy and also nauseous. I won’t be taking this again."

• 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."

• RJA...
• Taken for less than 1 month
• October 26, 2021

For Dietary Supplementation "I discovered L-theanine by accident through drinking green tea, which I noticed had a hugely positive effect on my mental state - feeling relaxed, calm, as well as alert with mental clarity. This led me to buy L-theanine supplements, and unfortunately, dosages from 40 mg to 400 mg each caused me physical and mental discomfort - headache, nausea, anxiety, and lack of focus. I wondered if I am sensitive to the L-theanine and should try out micro dosages."

• Iss...
• Taken for less than 1 month
• October 10, 2021

For Dietary Supplementation "I've had sleep issues for the past week since stopping smoking cannabis. I took nutritional advice at a health food shop and bought L-theanine and Serotonin 5-HTP. I took one each of the capsules shortly before going to bed last night, following the directions on the bottles. I had a terrible night with stomach pains and nausea, and then a headache developed. These symptoms have remained more or less constant, with a slight reduction for a time after taking paracetamol. It is now 4:25 PM. I will not be taking either of these supplements again."

• Jwc...
• Taken for 1 to 6 months
• May 22, 2022

For Dietary Supplementation "Diagnosed in the early '90s with ADD as a kid, docs tried me on all the usual suspects, made me a zombie kid, I hated it. 30 years of non-medicated personal mind battle later, and I learned about L-theanine. I take 200 mg in the morning and again after dinner. First dose ever, after 30 min or so, it was like the dust cloud in my head settled and the uncontrolled randomness of my otherwise frolicking mind just kind of chilled out. Not some voodoo miracle, but a legitimately settled and amiable thought process for me. Unfortunately, about 4 weeks in, and I believe it to be causing a pretty low-grade but almost constant nausea with an unsettled but not painful stomach. I am going to stop for a few days/week to confirm my experience. I do not notice any real boost when combined with caffeine, but I may tinker more. I don’t drink coffee, so I may need more caffeine content. I may try a different brand of L-theanine also, I really feel it helped me in a life-altering way as long as I can beat the nausea."

• Eme...
• Taken for less than 1 month
• November 6, 2021

For Dietary Supplementation "Opened a capsule and took some, and immediately felt anxious, nauseated, and worried with palpitations. Will not try again."