- Do not use Byetta if: you have type 1 diabetes or diabetic ketoacidosis (often caused by very high blood glucose levels), you are allergic to exenatide or meta-Cresol or any of the ingredients listed at the end of this leaflet, or you have severe kidney problems or you are on dialysis.
- Do not use the Byetta pen after the expiry date printed on the pack or if the packaging is torn or shows signs of tampering. Return the product to your pharmacist if it has expired or is damaged.
- Do not use the Byetta pen if you see solid particles or if the solution is cloudy or coloured.
- Do not use the Byetta pen if the pen has been in use for 30 days, even if there is medicine left in the pen.