Hi, I Have Had A Total Thyroidectomy And Take 175mg

Hi, I have had a total thyroidectomy and take 175mg daily of eutroxsig, last blood test my t4 and t3 were in normal range
I started duromine 15 mg and lost 6 kgs over 9 weeks but nothing much for the past 3 weeks, on the 15 mg I had no noted side effects, today I started on 30mg every second day
Is it safe to take this medication whilst on eutroxsig