Tsh is 0 048 T4 12 3 on 100 mcg Synthroid (thyroxine) dr decreased my dosage to half is this correct?

Recheck in 6 weeks. Don't forget to have your level rechecked 6 weeks after the change in dose, to insure further changes are needed. Make sure you're receiving brand name synthroid, (thyroxine) not a generic.
Too low a dose. The low TSH means that you need less synthroid, (thyroxine) but if you have been on 100 mcg for a long time, you likely need only a small reduction to 88 mcg. Cutting the dose in half (to 50 mcg) will likely result in your thyroid level coming out low.

Related Questions

On 75 mcg Synthroid for 8 months and TSH is. 7, FT4 1.46, FT3 3.3 but still wake at 2am. Lower T4 dosage, wait it out or investigate cortisol issues?

NO. Your labs suggest you are on the right dose of synthroid. When you take it ( should be in the AM) can affect sleep. If you are taking it correctly, I would recommend exploring other causes of your wakefulness. Read more...

Hi my TSH is 16 in spite of taking 100mcu of thyroxine. What is the best dosage. T3 (liothyronine) n T4 r normal?

Hypothyroidism. If free T4 is normal and you have no clinical signs or symptoms and TSH is elevated, you should be okay. Your doctor will make that determination. Read more...

TSH w/reflex to T4 was 0.25. T4 free 1.2. T3 free 2.7. Tsh level was higher and synthroid (thyroxine) 137mg. Still on same dosage. Would this cause fatigue?

Possibly. The low TSH with associated normal free T4 and free T3, (liothyronine) suggests borderline hyperthyroidism (overactive thyroid) which can cause fatigue. However, one should seek a thorough medical exam prior to concluding that the symptom of fatigue is not due to some other problem. Read more...

My T3 (liothyronine) : 78 ; T4 :6.9 & TSH 9.24. My daily dosage is one tablet of 25mcg thyroxine. Do I need to increase or decrease my dosage?

Hypothyroid. Your thyroid level is way too low. Please follow the instructions given you by your physician. No physician would be prescribing you this dose given your lab results. Read more...

My TSH is 9.75, T3 (liothyronine) is 2.10 and T4 is 0.73. I am taking 50 mg Thyroxine everyday. Is this enough or should I increase my dose?

Need more. TSH is still high. If you have been on same dosage for more than 6 weeks, you should talk to your primary. If dosage has been adjusted recently, you need to give it time for TSH to come down. Typically takes four to six weeks. You can also request a consult on health tap for a charge. Read more...
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Does normal (1.01) "thyroxine (t4) free, direct, s, " normal (0.931) "tsh, " and low (67) "triiodothyronine (t3)" = Synthroid dose good? Or go up/down?

Thyroid tests. The tsh, and secondarily the ft4, are normally used to guide the dosage of levothyroxine replacement. T3 (liothyronine) is not normally followed for this. There are a number of issues, and you would be best discussing this with your doctor. Read more...