during episodes of low blood sugar, or if you're allergic to insulin. get medical help right away if you have a serious allergic reaction such as body rash, or trouble breathing. don't reuse needles, or share insulin pens. the most common side effect is low blood sugar, which can be life-threatening. it may cause shaking, sweating, fast heartbeat, and blurred vision. check your blood sugar levels daily. injection site reactions may occur. don't change your dose of insulin without talking to your doctor. tell your doctor about all your medicines and medical conditions. check insulin label each time you inject. taking tzds with insulins like toujeo® may cause heart failure that can lead to death. toujeo®, ask your doctor. ♪let's groove tonight. that can lead to death. heartburn and gas? ♪ fight both fast tums chewy bites with gas relief all in one relief of heartburn and gas ♪ ♪ tum tum tum tums tums chewy bites with gas relief