Synthroid and Brain Fog: What Users Say

• Hyp...
• Taken for 10 years or more
• November 23, 2019

For Underactive Thyroid "I am a 57-year-old woman who has hypothyroidism. I've been taking 100mcg of Synthroid for 10 years. I dread taking this pill every morning. I feel like I have an out-of-body experience, blood rushes to my brain, causing anxiety, hair loss, muscle and joint pains, itching all over, brain fog, and insomnia. For the past week, I have been cutting it in half. I will be stopping this crazy cycle. I have lost so much weight just from the anxiety and insomnia. I do not want to have to rely on a synthetic pill and Klonopin, and be told I am depressed. I feel better without it."

• Kat...
• Taken for 1 to 6 months
• September 15, 2016

For Underactive Thyroid "I was taking Levothyroxin 50mcg for the past 3 months. My initial TSH was 13 when I started Levo; within 2 months, my TSH dropped to 2.5. Although my levels were normal, I continued to have some fatigue, sleepiness upon waking, night sweats, facial flushing, anxiety, and horrible brain fog. I decided to try my sample of Synthroid 50mcg and within a week, the brain fog, night sweats, and sleepiness were gone! I wake up with the most energy I have ever had! I am still experiencing some anxiety and facial flushing which we are monitoring, but overall Synthroid is working for me! I am 32 years old and 9 months postpartum. I also take my dose at night, hours after dinner."

• ric...
• August 6, 2020

For Hypothyroidism, After Thyroid Removal "Many doctors have begun to realize that many people are allergic to the ten or more additives in Synthroid. I had papillary thyroid cancer over 30 years ago. I had surgery, and I have been sick for over 30 years. The brain fog was terrible. I have fired more than 20 doctors over this time. They always said, 'Your lab report says your levels are fine.' On my second visit to a holistic doctor, she changed me to Tirosint, which has no additives. Tirosint is relatively new and is produced in Europe. TRY TIROSINT. Please…. You will not be sorry."

• Lbj...
• Taken for 5 to 10 years
• January 13, 2018

For Hypothyroidism, After Thyroid Removal "I'm taking Synthroid - it's a horrible drug. I'm losing all my hair, headaches, insomnia, depression, fatigue, brain fog, etc. This drug sucks, I have no idea why doctors keep pushing this drug. I have a new insurance and doctor, hopefully, I can start taking Armour. If not, I have no idea what's to come."

• Ave...
• Taken for 1 to 6 months
• October 27, 2022

For Underactive Thyroid "I've been on this medication for a month. 50 mcg. It makes me so tired I can barely stay awake to work during the day. It makes it very hard to concentrate. I didn't have fatigue or brain fog before starting this medicine. It has improved my joint pains, itching, and the ringing in my ears."

• Anonymous
• January 28, 2023

For Underactive Thyroid "I was on Synthroid for four weeks after I had a prothrombin time (PT) test. I didn't notice much change until week four, and I developed pretty severe heart palpitations that I'm still getting on and off. My anxiety increased, and I had brain fog, bloating, and weight gain. I have been off of it for a week, and my numbers are double what they were prior to starting it."

• Syn...
• Taken for 2 to 5 years
• November 13, 2022

For Hashimoto's disease "Currently on Synthroid 125 mcg, 22-year-old male. The medication does not get rid of symptoms, and I feel like death every day on it. Brain fog, joint pains."

• Anonymous
• Taken for 1 to 6 months
• December 26, 2022

For Underactive Thyroid "I have been on 25 mg, and I started out feeling better, more like myself. However, I have had some fog, anxiety, and depression lately. Also, I have had fever and fatigue. I need to switch medicines."