Too much Levothyroxine?

[ValBudding]

l have been on levothyoxine for underactive thyroid for many years now, slowly increasing in dose. However, a year ago l went from 50mg to 75mg and suffered a bout of vertigo and dizziness. 6 months ago, l was then increased to 100mg and once again suffered extreme vertigo, raised BP and dizziness. Beta blockers have now reduced my BP to normal. Problem is l am extremely disoriented, stumble around, blurred vision, suffer anxiety attacks to mention just a few symptoms. ls my dose too high? l have also lost 1 stone in the last year (purposely). l would appreciate your comments, Thanks, Val

[ValBudding]

Thank you for your response, l will talk to GP to see how far his testing goes and whether he is willing to do additional tests

[Barb135]

I understand that you are in U.K and it's harder for you to get adequate testing and treatment.  You should be tested for Free T3 and Free T4, along with the TSH, approximately 6 weeks after a dosage change, but I understand that most doctors in U.K only test TSH, though some will test FT4, too.

Yes, weight loss could affect the dosage you need; I thought you were mentioning it as a symptom of being over medicated.

With the symptoms you mentioned, you really should see your doctor and get retested.  Some of the symptoms you mentioned could apply to either over or under medicated.

Try to get your B-12 level tested, too, as long term untreated deficiency can cause neurological issues like the disorientation, stumbling, etc, though there are other things that can cause it, as well.  B-12 deficiency could also give you that drugged up/out of it (brain fog) feeling because the fatigue it causes is the worst imaginable.  

Of course, you have known hypothyroidism, so that's the first thing to have checked.

[ValBudding]

Unfortunately l don't know any of my results. I was last tested in November when the doctor raised my dose. l am from the UK. l understood that weight loss could affect the dose you needed. l am returning to my GP after the weekend but wanted to be a little more informed beforehand. All l know is that l feel like l am "drugged" up all the time now, and very much "out" of it. l want and need my life back!
By the way, my B-12 has not been tested.

[Barb135]

What are your actual thyroid hormone levels?  If you have a recent test, please post the results, with reference ranges, so we can see where your levels are within the range.  Ranges vary lab to lab and have to come from your own report.

It's not unusual for symptoms to worsen or for new ones to appear, when one is actively adjusting dosages.  

I don't see the weight loss as an issue, since you've done it on purpose.

Have you had vitamin B-12 tested?