Levothyroxine can elevate your blood sugar numbers but hypothyroidism is "terrible" for causing onset/advancement of Diabetic Complications, so a properly functioning Thyroid is imperative to overall diabetes management

The Thyroid is also responsible for regulating something called our "Basil Metabolic Rate" which is the number of calories we each need just to keep the body running when in a totally relaxed state (such as sleeping) - for most of us in our 50's or 60's our BMR might be in the 1300-1500 calorie range if everything is fine

An imbalance can significantly effect that BMR number which is why thyroid issues can make it more difficult for some to either lose or gain weight - they may need many more or less calories compared to others in order to effect a weight change one way or the other

I ran a couple of queries in the medical study database and found a "review" of a couple hundred studies around using Levothyroxine in patients with diabetes and here is a couple of hilites from the conclusions

Levothyroxine reduces oxidative stress, decreases UAER (had to look that one up - it's something that is measured to determine the level of kidney disease caused by diabetes - so "lower is better"), and provides an overall reno-protective effect in diabetic patients (kidney protection).

Levothyroxine replacement therapy may lower the risk of diabetic nephropathy and CVD development in hypothyroid patients

(so shows Kidney and Heart Protection in Diabetics who are prone to both)

The incidence of CVD was frequent in patients with T2DM with albuminuria and Thyroid disorder

(so while the drug can protect the kidneys, if CKD develops (high blood sugar would be a cause) patients were more likely to develop cardio vascular disease - obviously loss of any heart protection from the Thyroid Med)

So unless the side effects noted by the user are really debilitating it sounds (to me) like one of those drugs that does more Good than Harm if you have Hypothyroidism coupled with Type 2, both of which are based in our Metabolism (or more correctly - the "dysfunction" of our metabolisms that resulted in these metabolic disorders)

**(full article if anyone is interested is called: Systematic Review to Gauge the Effect of Levothyroxine Substitution on Progression of Diabetic Nephropathy in Patients With Hypothyroidism and Type 2 Diabetes Mellitus)

I also take a low dose of Levothyroxine . Thyroid and many metabolic diseases go hand in hand

https://www.verywellhealth.com/thyroid-disease-...

Why Thyroid Disease and Diabetes May Occur Together

https://www.verywellhealth.com/thyroid-disease-and-diabetes-3289616

I've been on levothyroxine for years. It has not exacerbated my diabetes at all.

Hi Everyone I just wanted to say I am praying for everyone and they get well you know God doesn't want any of us sick are to worry because he knows what we all need 🙏

I am SO GLAD I asked this question.
One of my best friend's daughters is fighting cancer and after her treatment, it threw her ( as it does many cancer patients) into diabetes. She asked me if my levothyroxine affected my blood sugars. I had honestly never even wondered because I was hypothyroid before I was diabetic. So I had no answers for her. Still, her questioning made me begin doing research..and since I have such an amazing community here I told her that I would also be coming to all of you, I see my doctor this Thursday for different issues but I am gonna bring this up to her and also tell her to recommend Very Well Health site to her diabetic patients.
Thank you so much!!