Sorry for the long winded post but I really need some advice.
June 2021 I had bloods taken for my extreme tiredness. TFT came back fine but Ferritin was 9. I was put on iron tablets for 3 months in which time my ferritin had crept up but GP told me to stay on them for another 3 month. At the end of the 3 month the tiredness had improved significantly.
In February 2022 I commenced a 3 month course of Terbinafine for fungal nail. 4 week after starting Terbinafine I needed a blood test to check my liver enzymes as the medication can cause liver problems. I asked the GP if they could also check my ferritin level as the tiredness had returned. He also rechecked my TFT. Liver enzymes were extremely elevated but had these rechecked after another 4 week and they had returned to normal range, Ferritin was fine but my TFT showed hypothyroidism. I was started on 125mcg of Levothyroxine daily and needed another blood test 8 week later. Had repeat bloods last week and the results showed I have now gone hyperthyroid. GP has reduced my Levothyroxine to 100mcg and review in another 8 week.
I am concerned that the Terbinafine gave a false TFT result but have researched and can not see anything about this. GP never mentioned it and did not seem concerned.
I have attached photos of my before and after Levothyroxine results.
Written by
TraceyT30
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Come back with new post once you get vitamin results and thyroid levels should be retested 8-10 weeks after dose reduction
ALWAYS test thyroid levels early morning, ideally before 9am and last dose levothyroxine 24 hours before test
Which brand of levothyroxine are you currently taking
Many people find different brands are not interchangeable
Do you normally take levothyroxine waking or bedtime
It must always be on empty stomach and then nothing apart from water for at least an hour after
No other medications or supplements within 2 hours minimum. Some like iron, calcium, magnesium, vitamin D tablets or HRT must be minimum 4 hours away from levothyroxine
Hi Tracy, I was diagnosed with Graves (hyperthyroid) and was prescribed Carbimazole to control the symptoms. Separately I had started taking Terbinafine for fungal toenails. Very fortunately for me the Graves disappeared, as did another auto immune issue I was having after a year or so. Interestingly at the same time my fungal infection got better. I do not know if the killing of nail and other fungi or the Terbinafine or just luck sorted the immune issues. I don't think the Terbinafine made anything worse in my case as I believe I had symptoms of Graves before I started taking the Terbinafine.
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