Tresiba doesn’t usually affect people’s heart rates.
But rarely, hypokalemia (having too little potassium in your blood) can be a side effect of Tresiba. Hypokalemia may cause heart palpitations (a fast or irregular heart rate).
Heart palpitations can also be a symptom of hypoglycemia (low blood sugar levels). Hypoglycemia is the most common side effect of all insulins, including Tresiba.
Most cases of hypoglycemia and hypokalemia from using Tresiba aren’t serious. However, these side effects can become severe in rare cases. For this reason, talk with your doctor immediately if you experience changes in your heart rate while using Tresiba.
Your doctor can help determine if your symptoms are mild or serious. And they can recommend the best way to treat both your side effects and your diabetes. This may include changing your Tresiba dosage or having you switch to a different medication.