Thyroid UK

Newly diagnosed


I've just been diagnosed with hypothyroidism after going to see my GP with chest pain and generally feeling unwell. I've been commenced on 25 of levo thyroxine.

Struggling with feelings of anxiety and the other symptoms associated with this.

For the past few months I have felt like I was going mad and couldn't cope, especially at work. My GP has said that he had never seen results so low and that I had probably been battling on for a long time. I'm just pleased that I now know why I have been feeling like I do.

Thank you!

1 Reply

Welcome to the forum, Mevamum.

Ask your GP receptionist to printout your thyroid results and ranges (ranges are the figures in brackets after results) and post them in a new question for advice.

25mcg is a low starting dose. If your thyroid levels were very low you will need dose increases every 6-8 weeks until you are optimally dosed. Dose adjustments are usually in 25mcg increments.

The goal of Levothyroxine is to restore the patient to euthyroid status. For most patients that will be when TSH is 1.0 or lower with FT4 in the upper range. FT4 needs to be in the upper range in order that sufficient T3 is converted. Read Treatment Options in

For maximum absorption Levothyroxine should be taken with water 1 hour before, or 2 hours after, food and drink, 2 hours away from other medication and supplements, and 4 hours away from calcium, iron, vitamin D supplements and oestrogen.

It takes 7-10 days for Levothyroxine to be absorbed before it starts working and it will take up to six weeks to feel the full impact of the dose. Symptoms may lag behind good biochemistry by several months.

You should have a follow up thyroid test 6-8 weeks after starting Levothyroxine. Arrange an early morning and fasting (water only) blood draw when TSH is highest, and take Levothyroxine after your blood draw.


I am not a medical professional and this information is not intended to be a substitute for medical advice from your own doctor. Please check with your personal physician before applying any of these suggestions.

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